使用dom4j需要导入jar包
jar包下载地址：http://pan.baidu.com/s/1o65jWRw
将dom4j-1.6.1.jar包导入Eclipse
book2.xml
- xml version="1.0" encoding="UTF-8"?>
-
- <书架>
- <书>
- <书名>JAVA书名>
- <作者>XXXXXX作者>
- <售价>23333售价>
- 书>
- <书>
- <书名>ANDROID书名>
- <作者>XXXXXX作者>
- <售价>23333售价>
- 书>
- 书架>
解析book2.xml这个文件。
方法：
获取文档的根结点：
Element root = document.getRootElement();
获取某个结点的子节点
Element element = root.element();
获取某个结点下的所有子节点：
List elements = root.elements();
遍历该结点下的所有子节点
以递归的方式进行
- public class dom4j {
-
- public static void main(String[] args) throws Exception {
- // method_1();
- method_2();
- }
-
- private static void method_2() throws Exception {
- SAXReader reader = new SAXReader();
- Document document = reader.read("book2.xml");
- Element root = document.getRootElement();
- parse(root);
- }
-
- private static void parse(Element ele) {
- // 处理当前元素包含的所有属性
- parseAttribute(ele);
- // 获取当前元素包含的所有
- List el = ele.elements();
- for (Object e : el) {
- Element element = (Element) e;
- // 如果该元素的内容不是只包含字符串
- if (!element.isTextOnly()) {
- parse(element);
- } else {
- // 处理当前 元素的全部属性
- parseAttribute(element);
- // 获取当前元素的内容
- System.out.println(element.getQName().getName() + "-->"
- + element.getText());
- }
- }
- }
-
- /**
- * 处理元素属性
- *
- * @param ele
- */
- private static void parseAttribute(Element ele) {
- List attributes = ele.attributes();
- for (Object e : attributes) {
- Attribute attribute = (Attribute) e;
- System.out.println(ele.getQName().getName() + "元素的"
- + attribute.getQName().getName() + "属性为"
- + attribute.getValue());
- }
- }
-
- private static void method_1() throws Exception {
- // 获取解析器
- SAXReader reader = new SAXReader();
- // 解析xml获取代表整个文档的dom对象
- Document document = reader.read("book2.xml");
- // 获取根结点
- Element rootElement = document.getRootElement();
- // 获取书名
- String bookName = rootElement.element("书").element("书名").getText();
- System.out.println("bookName--: " + bookName);
- }
-
- }
ML
XML 被设计用来传输和存储数据。HTML 被设计用来显示数据。
什么是 XML?
eXtensible Markup Language
- XML 指可扩展标记语言（EXtensible Markup Language）
- XML 是一种标记语言，很类似 HTML
- XML 的设计宗旨是传输数据，而非显示数据
- XML 标签没有被预定义。您需要自行定义标签。
- XML 被设计为具有自我描述性。
- XML 是 W3C 的推荐标准
XML 与 HTML 的主要差异
- XML 不是 HTML 的替代。
- XML 和 HTML 为不同的目的而设计：
- XML 被设计为传输和存储数据，其焦点是数据的内容。
- HTML 被设计用来显示数据，其焦点是数据的外观。
- HTML 旨在显示信息，而 XML 旨在传输信息。
<note>
<to>Georgeto>
<from>Johnfrom>
<heading>Reminderheading>
<body>Don't forget the meeting!body>
note>
- XML 不是对 HTML 的替代
- XML 是对 HTML 的补充。
- XML 不会替代 HTML，理解这一点很重要。在大多数 web 应用程序中，XML 用于传输数据，而 HTML 用于格式化并显示数据。
对 XML 最好的描述是：XML 是独立于软件和硬件的信息传输工具。
XML 的用途
XML 应用于 web 开发的许多方面，常用于简化数据的存储和共享。
XML 把数据从 HTML 分离。如果你需要在 HTML 文档中显示动态数据，那么每当数据改变时将花费大量的时间来编辑 HTML。通过 XML，数据能够存储在独立的 XML 文件中。这样你就可以专注于使用 HTML 进行布局和显示，并确保修改底层数据不再需要对 HTML 进行任何的改变。
XML树结构
XML 文档形成了一种树结构，它从“根部”开始，然后扩展到“枝叶”。
XML 文档必须包含根元素。该元素是所有其他元素的父元素。
XML 文档中的元素形成了一棵文档树。这棵树从根部开始，并扩展到树的最底端。所有元素均可拥有子元素：
<root>
<child>
<subchild>.....subchild>
child>
root>
父、子以及同胞等术语用于描述元素之间的关系。父元素拥有子元素。相同层级上的子元素成为同胞（兄弟或姐妹）。
所有元素均可拥有文本内容和属性（类似 HTML 中）。
如：
根元素是 。文档中的所有 元素都被包含在 中。 元素有 4 个子元素：、< author>、<year>、<price>。</p>
<pre class="prettyprint xml" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"> <span class="tag" style="color:rgb(0,0,128)"><<span class="title">bookstore</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">book</span> <span class="attribute" style="color:rgb(0,128,128)">category</span>=<span class="value" style="color:rgb(221,17,68)">"COOKING"</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">title</span> <span class="attribute" style="color:rgb(0,128,128)">lang</span>=<span class="value" style="color:rgb(221,17,68)">"en"</span>></span>Everyday Italian<span class="tag" style="color:rgb(0,0,128)"></<span class="title">title</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">author</span>></span>Giada De Laurentiis<span class="tag" style="color:rgb(0,0,128)"></<span class="title">author</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">year</span>></span>2005<span class="tag" style="color:rgb(0,0,128)"></<span class="title">year</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">price</span>></span>30.00<span class="tag" style="color:rgb(0,0,128)"></<span class="title">price</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">book</span> <span class="attribute" style="color:rgb(0,128,128)">category</span>=<span class="value" style="color:rgb(221,17,68)">"CHILDREN"</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">title</span> <span class="attribute" style="color:rgb(0,128,128)">lang</span>=<span class="value" style="color:rgb(221,17,68)">"en"</span>></span>Harry Potter<span class="tag" style="color:rgb(0,0,128)"></<span class="title">title</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">author</span>></span>J K. Rowling<span class="tag" style="color:rgb(0,0,128)"></<span class="title">author</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">year</span>></span>2005<span class="tag" style="color:rgb(0,0,128)"></<span class="title">year</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">price</span>></span>29.99<span class="tag" style="color:rgb(0,0,128)"></<span class="title">price</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">book</span> <span class="attribute" style="color:rgb(0,128,128)">category</span>=<span class="value" style="color:rgb(221,17,68)">"WEB"</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">title</span> <span class="attribute" style="color:rgb(0,128,128)">lang</span>=<span class="value" style="color:rgb(221,17,68)">"en"</span>></span>Learning XML<span class="tag" style="color:rgb(0,0,128)"></<span class="title">title</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">author</span>></span>Erik T. Ray<span class="tag" style="color:rgb(0,0,128)"></<span class="title">author</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">year</span>></span>2003<span class="tag" style="color:rgb(0,0,128)"></<span class="title">year</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">price</span>></span>39.95<span class="tag" style="color:rgb(0,0,128)"></<span class="title">price</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">bookstore</span>></span></code>
</pre>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> XML 语法规则</h4>
<ul style="padding:0px; margin:0px 0px 0.75em 25px; list-style-type:none; font-size:16px; line-height:27.2px; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<li style="line-height:1.7em; list-style-type:disc">所有 XML 元素都须有关闭标签</li>
<li style="line-height:1.7em; list-style-type:disc">XML 标签对大小写敏感</li>
<li style="line-height:1.7em; list-style-type:disc">XML 必须正确地嵌套</li>
<li style="line-height:1.7em; list-style-type:disc">XML 文档必须有根元素</li>
<li style="line-height:1.7em; list-style-type:disc">XML 的属性值须加引号</li>
<li style="line-height:1.7em; list-style-type:disc">实体引用</li>
</ul>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th width="36%" style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 实体</th>
<th width="32%" style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 引用</th>
<th width="32%" style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 意义</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> <</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> <</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 小于</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> ></td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> ></td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 大于</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> &</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> &</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 和号</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> '</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> '</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 单引号</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> "</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> "</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 引号</td>
</tr>
</tbody>
</table>
<div style="font-size:16px; line-height:27.2px; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<p style="margin-top:0px; margin-bottom:0.75em; line-height:1.7em; text-indent:1em"> - XML 中的注释</p>
<p style="margin-top:0px; margin-bottom:0.75em; line-height:1.7em; text-indent:1em"> 在 XML 中编写注释的语法与 HTML 的语法很相似：</p>
<p style="margin-top:0px; margin-bottom:0.75em; line-height:1.7em; text-indent:1em"> <!- - This is a comment - -></p>
</div>
<ul style="padding:0px; margin:0px 0px 0.75em 25px; list-style-type:none; font-size:16px; line-height:27.2px; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<li style="line-height:1.7em; list-style-type:disc">在 XML 中，空格会被保留</li>
<li style="line-height:1.7em; list-style-type:disc">XML <strong>以 LF 存储换行</strong></li>
</ul>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> XPATH</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> XPath即为XML路径语言，它是一种用来确定XML（标准通用标记语言的子集）文档中某部分位置的语言</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 最有用的路径表达式：</p>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th width="15%" style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 表达式</th>
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 描述</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> nodename</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取此节点的所有子节点。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> /</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 从根节点选取。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> //</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 从匹配选择的当前节点选择文档中的节点，而不考虑它们的位置。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> .</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取当前节点。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> ..</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取当前节点的父节点。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> @</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取属性。</td>
</tr>
</tbody>
</table>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th width="25%" style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 路径表达式</th>
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 结果</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> bookstore</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取 bookstore 元素的所有子节点。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> /bookstore</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取根元素 bookstore。注释：假如路径起始于正斜杠( / )，则此路径始终代表到某元素的绝对路径！</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> bookstore/book</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取属于 bookstore 的子元素的所有 book 元素。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> //book</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取所有 book 子元素，而不管它们在文档中的位置。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> bookstore//book</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选择属于 bookstore 元素的后代的所有 book 元素，而不管它们位于 bookstore 之下的什么位置。</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> //@lang</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 选取名为 lang 的所有属性。</td>
</tr>
</tbody>
</table>
<h3 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> Java解析XML文件</h3>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> 4种解析方式</h4>
<div style="font-size:16px; line-height:27.2px; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<p style="margin-top:0px; margin-bottom:0.75em; line-height:1.7em; text-indent:1em"> 来自</p> http://bbs.csdn.net/topics/290027113/
</div>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> DOM（Document Object Model JAXP Crimson解析器）</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> DOM是用与平台和语言无关的方式表示XML文档的官方W3C标准。DOM是以层次结构组织的节点或信息片断的集合。这个层次结构允许开发人员在树中寻找特定信息。分析该结构通常需要加载整个文档和构造层次结构，然后才能做任何工作。由于它是基于信息层次的，因而DOM被认为是基于树或基于对象的。DOM以及广义的基于树的处理具有几个优点。首先，由于树在内存中是持久的，因此可以修改它以便应用程序能对数据和结构作出更改。它还可以在任何时候在树中上下导航，而不是像SAX那样是一次性的处理。DOM使用起来也要简单得多。</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> SAX（Simple API for XML）</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> SAX处理的优点非常类似于流媒体的优点。分析能够立即开始，而不是等待所有的数据被处理。而且，由于应用程序只是在读取数据时检查数据，因此不需要将数据存储在内存中。这对于大型文档来说是个巨大的优点。事实上，应用程序甚至不必解析整个文档；它可以在某个条件得到满足时停止解析。一般来说，SAX还比它的替代者DOM快许多。</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> DOM解析器把XML文档转化为一个包含其内容的树，并可以对树进行遍历。用DOM解析模型的优点是编程容易，开发人员只需要调用建树的指令，然后利用navigation APIs访问所需的树节点来完成任务。可以很容易的添加和修改树中的元素。然而由于使用DOM解析器的时候需要处理整个XML文档，所以对性能和内存的要求比较高，尤其是遇到很大的XML文件的时候。由于它的遍历能力，DOM解析器常用于XML文档需要频繁的改变的服务中。</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> SAX解析器采用了基于事件的模型，它在解析XML文档的时候可以触发一系列的事件，当发现给定的tag的时候，它可以激活一个回调方法，告诉该方法制定的标签已经找到。SAX对内存的要求通常会比较低，因为它让开发人员自己来决定所要处理的tag.特别是当开发人员只需要处理文档中所包含的部分数据时，SAX这种扩展能力得到了更好的体现。但用SAX解析器的时候编码工作会比较困难，而且很难同时访问同一个文档中的多处不同数据。</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> JDOM http://www.jdom.org</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> JDOM的目的是成为Java特定文档模型，它简化与XML的交互并且比使用DOM实现更快。由于是第一个Java特定模型，JDOM一直得到大力推广和促进。正在考虑通过“Java规范请求JSR-102”将它最终用作“Java标准扩展”。从2000年初就已经开始了JDOM开发。</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> JDOM与DOM主要有两方面不同。首先，JDOM仅使用具体类而不使用接口。这在某些方面简化了API，但是也限制了灵活性。第二，API大量使用了Collections类，简化了那些已经熟悉这些类的Java开发者的使用。</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> DOM4J http://dom4j.sourceforge.net</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 虽然DOM4J代表了完全独立的开发结果，但最初，它是JDOM的一种智能分支。它合并了许多超出基本XML文档表示的功能，包括集成的XPath支持、XML Schema支持以及用于大文档或流化文档的基于事件的处理。它还提供了构建文档表示的选项，它通过DOM4J API和标准DOM接口具有并行访问功能。</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 比较</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 1）DOM4J性能最好，连Sun的JAXM也在用DOM4J.目前许多开源项目中大量采用DOM4J，例如大名鼎鼎的Hibernate也用DOM4J来读取XML配置文件。如果不考虑可移植性，那就采用DOM4J.</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 2）JDOM和DOM在性能测试时表现不佳，在测试10M文档时内存溢出。在小文档情况下还值得考虑使用DOM和JDOM.虽然JDOM的开发者已经说明他们期望在正式发行版前专注性能问题，但是从性能观点来看，它确实没有值得推荐之处。另外，DOM仍是一个非常好的选择。DOM实现广泛应用于多种编程语言。它还是许多其它与XML相关的标准的基础，因为它正式获得W3C推荐（与基于非标准的Java模型相对），所以在某些类型的项目中可能也需要它（如在JavaScript中使用DOM）。</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 3）SAX表现较好，这要依赖于它特定的解析方式－事件驱动。一个SAX检测即将到来的XML流，但并没有载入到内存（当然当XML流被读入时，会有部分文档暂时隐藏在内存中）。</p>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> dom4j简易教程</h4>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> 获取Document</h4>
<pre class="prettyprint cs" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto">SAXReader reader = <span class="keyword" style="font-weight:bold">new</span> SAXReader();
Document document = reader.read(<span class="string" style="color:rgb(221,17,68)">"bookstore.xml"</span>);</code></pre>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> Iterator</h4>
<pre><code class="language-java"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">void</span> bar(Document document) <span class="keyword" style="font-weight:bold">throws</span> DocumentException
Element root = document.getRootElement();
<span class="comment" style="color:rgb(153,153,136); font-style:italic">// iterate through child elements of root</span>
<span class="keyword" style="font-weight:bold">for</span> ( Iterator i = root.elementIterator(); i.hasNext(); ) {
<span class="indent"> </span> Element element = (Element) i.next();
<span class="indent"> </span> <span class="comment" style="color:rgb(153,153,136); font-style:italic">// do something</span>
}
<span class="comment" style="color:rgb(153,153,136); font-style:italic">// iterate through child elements of root with element name "foo"</span>
<span class="keyword" style="font-weight:bold">for</span> ( Iterator i = root.elementIterator( <span class="string" style="color:rgb(221,17,68)">"foo"</span> ); i.hasNext(); ) {
<span class="indent"> </span> Element foo = (Element) i.next();
<span class="indent"> </span> <span class="comment" style="color:rgb(153,153,136); font-style:italic">// do something</span>
}
<span class="comment" style="color:rgb(153,153,136); font-style:italic">// iterate through attributes of root</span>
<span class="keyword" style="font-weight:bold">for</span> ( Iterator i = root.attributeIterator(); i.hasNext(); ) {
<span class="indent"> </span> Attribute attribute = (Attribute) i.next();
<span class="indent"> </span> <span class="comment" style="color:rgb(153,153,136); font-style:italic">// do something</span>
}
}</code>
</code></pre>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> XPath表达式</h4>
<pre class="prettyprint cs" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> main(String[] args) throws DocumentException
{
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"Hello World!"</span>);
<span class="indent"> </span>SAXReader sax = <span class="keyword" style="font-weight:bold">new</span> SAXReader();
<span class="indent"> </span>Document document = sax.read(<span class="string" style="color:rgb(221,17,68)">"bookstore.xml"</span>);
<span class="indent"> </span>List<Node> list = document.selectNodes( <span class="string" style="color:rgb(221,17,68)">"//book/title"</span> );
<span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span>(Node n : list){
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"======================="</span>);
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"节点名："</span> + n.getName());
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"节点值："</span> + n.getText());
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"节点XPath："</span> + n.getPath());
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"节点属性lang值："</span> + n.valueOf(<span class="string" style="color:rgb(221,17,68)">"@lang"</span>));
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"节点所属的xml文档对象："</span> +n.getDocument().equals(document));
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"节点父亲名字："</span> + n.getParent().getQName().getName());
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"节点类型："</span> + n.getNodeTypeName());
<span class="indent"> </span>}
<span class="indent"> </span>Node node = document.selectSingleNode( <span class="string" style="color:rgb(221,17,68)">"/bookstore/book"</span> );
<span class="indent"> </span>String name = node.valueOf( <span class="string" style="color:rgb(221,17,68)">"@category"</span> );
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(name);
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(node.getDocument());
}</code>
</pre>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> 快速遍历</h4>
<pre class="prettyprint cs" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> main(String[] args) throws DocumentException
{
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"Hello World!"</span>);
<span class="indent"> </span>SAXReader sax = <span class="keyword" style="font-weight:bold">new</span> SAXReader();
<span class="indent"> </span>Document document = sax.read(<span class="string" style="color:rgb(221,17,68)">"bookstore.xml"</span>);
<span class="indent"> </span>Element root = document.getRootElement();
<span class="indent"> </span>DFS(root);
}
<span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> DFS(Element e){
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(e.getQName().getName()+<span class="string" style="color:rgb(221,17,68)">"------------"</span>+e.getNodeTypeName());
<span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span> ( <span class="keyword" style="font-weight:bold">int</span> i = <span class="number" style="color:rgb(0,153,153)">0</span>, size = e.nodeCount(); i < size; i++ ) {
<span class="indent"> </span><span class="indent"> </span>Node node = e.node(i);
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">if</span> ( node instanceof Element ) {
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>DFS( (Element) node );
<span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">else</span> {
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">if</span>(node.getText().trim().length() > <span class="number" style="color:rgb(0,153,153)">0</span>){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(node.getNodeTypeName()+<span class="string" style="color:rgb(221,17,68)">"-------------"</span> + node.getText().trim());
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span>}
}</code>
</pre>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> </p>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> 制作新XML文件</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 从零开始制作XML</p>
<pre class="prettyprint cs" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> main(String[] args) throws Exception
{
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"Hello World!"</span>);
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//1. 创建Document对象</span>
<span class="indent"> </span>Document document = createDocument();
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//2. 将Document写入文件，两种方式，简洁方式和美观方式</span>
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//2.1 简洁方式，设置OutputFormat为compact</span>
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//2.2 美观方式，设置OutputFormat为pretty</span>
<span class="indent"> </span>write(document);
}
<span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> Document createDocument(){
<span class="indent"> </span>Document document = DocumentHelper.createDocument();
<span class="indent"> </span>Element root = document.addElement(<span class="string" style="color:rgb(221,17,68)">"root"</span>);
<span class="indent"> </span>Element author1 = root.addElement( <span class="string" style="color:rgb(221,17,68)">"author"</span> )
<span class="indent"> </span><span class="indent"> </span>.addAttribute( <span class="string" style="color:rgb(221,17,68)">"name"</span>, <span class="string" style="color:rgb(221,17,68)">"James"</span> )
<span class="indent"> </span><span class="indent"> </span>.addAttribute( <span class="string" style="color:rgb(221,17,68)">"location"</span>, <span class="string" style="color:rgb(221,17,68)">"UK"</span> )
<span class="indent"> </span><span class="indent"> </span>.addText( <span class="string" style="color:rgb(221,17,68)">"James Strachan"</span> );
<span class="indent"> </span>Element author2 = root.addElement( <span class="string" style="color:rgb(221,17,68)">"author"</span> )
<span class="indent"> </span><span class="indent"> </span>.addAttribute( <span class="string" style="color:rgb(221,17,68)">"name"</span>, <span class="string" style="color:rgb(221,17,68)">"Bob"</span> )
<span class="indent"> </span><span class="indent"> </span>.addAttribute( <span class="string" style="color:rgb(221,17,68)">"location"</span>, <span class="string" style="color:rgb(221,17,68)">"US"</span> )
<span class="indent"> </span><span class="indent"> </span>.addText( <span class="string" style="color:rgb(221,17,68)">"Bob McWhirter"</span> );
<span class="indent"> </span><span class="keyword" style="font-weight:bold">return</span> document;
}
<span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> write(Document document) throws Exception {
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">// lets write to a file</span>
<span class="indent"> </span>XMLWriter writer = <span class="keyword" style="font-weight:bold">new</span> XMLWriter( <span class="keyword" style="font-weight:bold">new</span> FileWriter( <span class="string" style="color:rgb(221,17,68)">"output.xml"</span> ) );
<span class="indent"> </span>writer.write( document );
<span class="indent"> </span>writer.close();
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">// Pretty print the document to System.out</span>
<span class="indent"> </span>OutputFormat format = OutputFormat.createPrettyPrint();
<span class="indent"> </span>writer = <span class="keyword" style="font-weight:bold">new</span> XMLWriter( System.<span class="keyword" style="font-weight:bold">out</span>, format );
<span class="indent"> </span>writer.write( document );
<span class="indent"> </span>writer.close();
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">// Compact format to System.out</span>
<span class="indent"> </span>format = OutputFormat.createCompactFormat();
<span class="indent"> </span>writer = <span class="keyword" style="font-weight:bold">new</span> XMLWriter( System.<span class="keyword" style="font-weight:bold">out</span>, format );
<span class="indent"> </span>writer.write( document );
<span class="indent"> </span>writer.close();
}</code>
</pre>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> 字符串与XML互换</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 实现字符串和XML文件之间的转换</p>
<pre class="prettyprint cs" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> main(String[] args) throws Exception
{
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"Hello World!"</span>);
<span class="indent"> </span>SAXReader sax = <span class="keyword" style="font-weight:bold">new</span> SAXReader();
<span class="indent"> </span>Document document = sax.read(<span class="string" style="color:rgb(221,17,68)">"bookstore.xml"</span>);
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//将XML文件转成string</span>
<span class="indent"> </span>String str = document.asXML();
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(str);
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//删除换行</span>
<span class="indent"> </span>str = str.replaceAll(<span class="string" style="color:rgb(221,17,68)">"[\n]"</span>,<span class="string" style="color:rgb(221,17,68)">""</span>);
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(str);
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//将string转换成document对象，然后写入XML文件</span>
<span class="indent"> </span>Document document1 = DocumentHelper.parseText(str);
<span class="indent"> </span>XMLWriter writer = <span class="keyword" style="font-weight:bold">new</span> XMLWriter(<span class="keyword" style="font-weight:bold">new</span> FileWriter(<span class="string" style="color:rgb(221,17,68)">"stringToXML.xml"</span>));
<span class="indent"> </span>writer.write(document1);
<span class="indent"> </span>writer.flush();
<span class="indent"> </span>writer.close();
}</code>
</pre>
<h3 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> 实例</h3>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 将一个XML文件转换成类对象1、创建xml文件</p>
<pre class="prettyprint xml" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="pi" style="color:rgb(153,153,153); font-weight:bold"><?xml version="1.0" ?></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">root</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">Book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">category</span>></span>COOKING<span class="tag" style="color:rgb(0,0,128)"></<span class="title">category</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">title</span>></span>Everyday Italian<span class="tag" style="color:rgb(0,0,128)"></<span class="title">title</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">author</span>></span>Giada De Laurentiis<span class="tag" style="color:rgb(0,0,128)"></<span class="title">author</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">year</span>></span>2005<span class="tag" style="color:rgb(0,0,128)"></<span class="title">year</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">price</span>></span>30.00<span class="tag" style="color:rgb(0,0,128)"></<span class="title">price</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">Book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">Book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">category</span>></span>CHILDREN<span class="tag" style="color:rgb(0,0,128)"></<span class="title">category</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">title</span> <span class="attribute" style="color:rgb(0,128,128)">lang</span>=<span class="value" style="color:rgb(221,17,68)">"en"</span>></span>Harry Potter<span class="tag" style="color:rgb(0,0,128)"></<span class="title">title</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">author</span>></span>J K. Rowling<span class="tag" style="color:rgb(0,0,128)"></<span class="title">author</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">year</span>></span>2005<span class="tag" style="color:rgb(0,0,128)"></<span class="title">year</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">price</span>></span>29.99<span class="tag" style="color:rgb(0,0,128)"></<span class="title">price</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">Book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">Book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">category</span>></span>WEB<span class="tag" style="color:rgb(0,0,128)"></<span class="title">category</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">title</span> <span class="attribute" style="color:rgb(0,128,128)">lang</span>=<span class="value" style="color:rgb(221,17,68)">"en"</span>></span>Learning XML<span class="tag" style="color:rgb(0,0,128)"></<span class="title">title</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">author</span>></span>Erik T. Ray<span class="tag" style="color:rgb(0,0,128)"></<span class="title">author</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">year</span>></span>2003<span class="tag" style="color:rgb(0,0,128)"></<span class="title">year</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">price</span>></span>39.95<span class="tag" style="color:rgb(0,0,128)"></<span class="title">price</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">Book</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">root</span>></span></code></pre>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 2、编写java bean文件3、转换类</p>
<pre class="prettyprint cs" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">class</span> XMLToClass
{
<span class="indent"> </span><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> main(String[] args)
<span class="indent"> </span>{
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"Hello World!"</span>);
<span class="indent"> </span><span class="indent"> </span>readXML(<span class="string" style="color:rgb(221,17,68)">"classXML.xml"</span>);
<span class="indent"> </span>}
<span class="indent"> </span><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> readXML(String xmlFileName) {
<span class="indent"> </span><span class="indent"> </span>SAXReader sax = <span class="keyword" style="font-weight:bold">new</span> SAXReader();
<span class="indent"> </span><span class="indent"> </span>Document document = <span class="keyword" style="font-weight:bold">null</span>;
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">try</span>{
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>document = sax.read(xmlFileName);
<span class="indent"> </span><span class="indent"> </span>}<span class="keyword" style="font-weight:bold">catch</span>(DocumentException dex){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>dex.printStackTrace();
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"获取Document对象失败"</span>);
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">return</span>;
<span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span>Element root = document.getRootElement();
<span class="indent"> </span><span class="indent"> </span>List<Element> objs = root.elements();
<span class="indent"> </span><span class="indent"> </span>List<Element> properties = <span class="keyword" style="font-weight:bold">null</span>;
<span class="indent"> </span><span class="indent"> </span>String className = <span class="string" style="color:rgb(221,17,68)">""</span>;
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">if</span>(objs.size() > <span class="number" style="color:rgb(0,153,153)">0</span>){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取类名</span>
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>className = objs.<span class="keyword" style="font-weight:bold">get</span>(<span class="number" style="color:rgb(0,153,153)">0</span>).getQName().getName();
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>properties = objs.<span class="keyword" style="font-weight:bold">get</span>(<span class="number" style="color:rgb(0,153,153)">0</span>).elements();
<span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"类名："</span> + className);
<span class="indent"> </span><span class="indent"> </span>List<String> pros = <span class="keyword" style="font-weight:bold">new</span> ArrayList<String>();
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span>(<span class="keyword" style="font-weight:bold">int</span> i = <span class="number" style="color:rgb(0,153,153)">0</span> ; i < properties.size(); i ++){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"属性"</span>+i+<span class="string" style="color:rgb(221,17,68)">":"</span>+properties.<span class="keyword" style="font-weight:bold">get</span>(i).getQName().getName());
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>pros.add(properties.<span class="keyword" style="font-weight:bold">get</span>(i).getQName().getName());
<span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(pros);
<span class="indent"> </span><span class="indent"> </span>List<Object> list = createObject(className,objs);
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span>(Object o : list){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(o);
<span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span>}
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">/*
<span class="indent"> </span>* 根据类名，属性值构造对象
<span class="indent"> </span>*/</span>
<span class="indent"> </span><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> List<Object> createObject(String className,List<Element> objNodes){
<span class="indent"> </span><span class="indent"> </span>Class clazz = <span class="keyword" style="font-weight:bold">null</span>;
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">try</span>{
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>clazz = Class.forName(className);
<span class="indent"> </span><span class="indent"> </span>}<span class="keyword" style="font-weight:bold">catch</span>(ClassNotFoundException cnfe){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(className + <span class="string" style="color:rgb(221,17,68)">"没有找到！"</span>);
<span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span>List<Object> objs = <span class="keyword" style="font-weight:bold">new</span> ArrayList<Object>();
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span>(<span class="keyword" style="font-weight:bold">int</span> i = <span class="number" style="color:rgb(0,153,153)">0</span>; i < objNodes.size(); i++){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>List<Element> properties = objNodes.<span class="keyword" style="font-weight:bold">get</span>(i).elements();
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">try</span>{
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>Object obj = clazz.newInstance();
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span>(<span class="keyword" style="font-weight:bold">int</span> j = <span class="number" style="color:rgb(0,153,153)">0</span>; j < properties.size(); j ++){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>Element e = properties.<span class="keyword" style="font-weight:bold">get</span>(j);
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>Field field = clazz.getDeclaredField(e.getQName().getName());
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>field.setAccessible(<span class="keyword" style="font-weight:bold">true</span>);
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取域的类型，需要选择field的set方法</span>
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>String type = field.getType().getName();
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">if</span>(<span class="string" style="color:rgb(221,17,68)">"int"</span>.equals(type)){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>field.setInt(obj,Integer.parseInt(e.getText().trim()));
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}<span class="keyword" style="font-weight:bold">else</span> <span class="keyword" style="font-weight:bold">if</span>(<span class="string" style="color:rgb(221,17,68)">"double"</span>.equals(type)){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>field.setDouble(obj,Double.parseDouble(e.getText().trim()));
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}<span class="keyword" style="font-weight:bold">else</span>{
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>field.<span class="keyword" style="font-weight:bold">set</span>(obj,e.getText().trim());
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>objs.add(obj);
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}<span class="keyword" style="font-weight:bold">catch</span>(InstantiationException ie){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"实例化类失败！"</span>);
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}<span class="keyword" style="font-weight:bold">catch</span>(NoSuchFieldException nse){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"找不到指定的数据域！"</span>);
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}<span class="keyword" style="font-weight:bold">catch</span>(IllegalAccessException iae){
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"底层字段是不可访问的！"</span>);
<span class="indent"> </span><span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span>}
<span class="indent"> </span><span class="indent"> </span><span class="keyword" style="font-weight:bold">return</span> objs;
<span class="indent"> </span>}
}</code>
</pre>
<h3 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> 相关类和接口</h3>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> </p>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> Document</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 实现了Node接口</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 获取根元素Element getRootElement()</p>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> Element</h4>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 方法</th>
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 意义</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Iterator elementIterator()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回一个包含子元素的迭代器</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> List elements()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回子元素列表</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Element element(String name)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 根据name获取Element</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> QName getQName()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 获取元素的QName名字</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> int attributeCount()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 获取属性个数</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Attribute attribute(int index)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 第index个属性</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> getText()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 如果元素有值，则获取值</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> String elementText(String name)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 获取值</td>
</tr>
</tbody>
</table>
<pre class="prettyprint cs" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="keyword" style="font-weight:bold">public</span> <span class="keyword" style="font-weight:bold">static</span> <span class="keyword" style="font-weight:bold">void</span> main(String[] args) throws DocumentException
{
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"Hello World!"</span>);
<span class="indent"> </span>SAXReader sax = <span class="keyword" style="font-weight:bold">new</span> SAXReader();
<span class="indent"> </span>Document document = sax.read(<span class="string" style="color:rgb(221,17,68)">"bookstore.xml"</span>);
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取xml的根元素</span>
<span class="indent"> </span>Element root = document.getRootElement();
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(root.getQName().getName());
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取指定的元素，根据QName或者name</span>
<span class="indent"> </span>Element foo = root.element(<span class="string" style="color:rgb(221,17,68)">"foo"</span>);
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取元素的属性个数</span>
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"属性个数："</span> + foo.attributeCount());
<span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span>(<span class="keyword" style="font-weight:bold">int</span> i = <span class="number" style="color:rgb(0,153,153)">0</span>; i < foo.attributeCount(); i++){
<span class="indent"> </span><span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取元素的属性，三种方式QName，Name，Index</span>
<span class="indent"> </span><span class="indent"> </span>Attribute a = foo.attribute(i);
<span class="indent"> </span><span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取属性值</span>
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(a.getQName().getName() + <span class="string" style="color:rgb(221,17,68)">"="</span> + a.getValue());
<span class="indent"> </span>}
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取属性列表</span>
<span class="indent"> </span>List<Attribute> list = foo.attributes();
<span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span>(Attribute a : list){
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(a.getQName().getName() + <span class="string" style="color:rgb(221,17,68)">"="</span> + a.getValue());
<span class="indent"> </span>}
<span class="indent"> </span><span class="comment" style="color:rgb(153,153,136); font-style:italic">//获取指定属性名的值</span>
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"color:"</span>+foo.attributeValue(<span class="string" style="color:rgb(221,17,68)">"color"</span>));
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(<span class="string" style="color:rgb(221,17,68)">"================================"</span>);
<span class="indent"> </span>List<Element> list1 = root.elements(<span class="string" style="color:rgb(221,17,68)">"book"</span>);
<span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println();
<span class="indent"> </span><span class="keyword" style="font-weight:bold">for</span>(Element e : list1){
<span class="indent"> </span><span class="indent"> </span>Element child = e.element(<span class="string" style="color:rgb(221,17,68)">"title"</span>);
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(child.getText());
<span class="indent"> </span><span class="indent"> </span>System.<span class="keyword" style="font-weight:bold">out</span>.println(e.elementText(<span class="string" style="color:rgb(221,17,68)">"title"</span>));
<span class="indent"> </span>}
}</code>
</pre>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> Attribute</h4>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th width="35%" style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 方法</th>
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 意义</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> QName getQName()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回属性名QName（）</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> String getValue()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 获取属性值</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> void setValue(String value)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 设置属性值，若是只读则抛出异常UnsupportedOperationException</td>
</tr>
</tbody>
</table>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> QName</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> Namespace getNamespace()String getName()</p>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> SAXReader</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 读取xml文件read</p>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> Node</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 接口类型</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 最好熟悉XPath语法</p>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 方法</th>
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 意义</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Document getDocument()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> String getName()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回Node名</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> String getText()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回节点的文本内容，最好再使用string的trim()方法删除两端的换行符</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Element getParent()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回父节点</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> short getNodeType()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回节点类型整数值</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> String getNodeTypeName()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回节点类型</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> List selectNodes(String xpathExpression)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 返回Node列表</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> write(Writer writer)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
</tbody>
</table>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> Branch</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 接口类型</p>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 定义了节点的共同行为</p>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th width="35%" style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 方法</th>
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 意义</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> int indexOf(Node node)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Node node(int index)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> int nodeCount()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Iterator nodeIterator()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> void add(Comment comment)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Adds the given Comment to this branch.</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> void add(Element element)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Adds the given Element to this branch.</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> void add(Node node)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Adds the given Node or throws IllegalAddException if the given node is not of a valid type.</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Element addElement(String name)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Adds a new Element node with the given name to this branch and returns a reference to the new node.</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> boolean remove(Comment comment)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Removes the given Comment if the node is an immediate child of this branch.</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> boolean remove(Element element)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Removes the given Element if the node is an immediate child of this branch.</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> boolean remove(Node node)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> Removes the given Node if the node is an immediate child of this branch.</td>
</tr>
</tbody>
</table>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> XMLWriter</h4>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 方法</th>
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 意义</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> XMLWriter()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 默认是简洁输出</td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> XMLWriter(OutputFormat format)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> XMLWriter(OutputStream out)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> XMLWriter(OutputStream out, OutputFormat format)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> XMLWriter(Writer writer)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> XMLWriter(Writer writer, OutputFormat format)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> </td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> void write(Document doc)</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> This will print the Document to the current Writer.</td>
</tr>
</tbody>
</table>
<h4 style="margin:0px 0px 0.5em; font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; line-height:1.6em; color:rgb(51,51,51); font-size:18px; text-indent:1em; background-color:rgb(254,254,254)"> OutputFormat</h4>
<p style="margin-top:0px; margin-bottom:0.75em; font-size:16px; line-height:27.2px; text-indent:1em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)"> 输出样式控制</p>
<table class="table table-bordered " style="max-width:100%; border-spacing:0px; width:605.455px; margin-bottom:1.5em; border-width:1px 1px 1px 0px; border-top-style:solid; border-right-style:solid; border-bottom-style:solid; border-top-color:rgb(221,221,221); border-right-color:rgb(221,221,221); border-bottom-color:rgb(221,221,221); font-size:14px; line-height:1.3em; color:rgb(51,51,51); font-family:'Helvetica Neue',Helvetica,Tahoma,Arial,STXihei,'Microsoft YaHei',微软雅黑,sans-serif; background-color:rgb(254,254,254)">
<thead>
<tr style="line-height:1.3em">
<th width="35%" style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 方法</th>
<th style="padding:8px; line-height:1.5em; vertical-align:bottom; border-top-width:0px; border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221)"> 意义</th>
</tr>
</thead>
<tbody>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> static OutputFormat createCompactFormat()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 简洁输出，没有添加为了美观的换行符，如： <code style="padding:2px 4px; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:none; background-color:rgb(247,247,249)"><root><author name="James" location="UK">James Strachan</author><author name="Bob" location="US">Bob McWhirter</author></root></code></td>
</tr>
<tr style="line-height:1.3em">
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> static OutputFormat createPrettyPrint()</td>
<td style="padding:8px; line-height:1.3em; vertical-align:top; border-top-width:1px; border-top-style:solid; border-top-color:rgb(221,221,221); border-left-width:1px; border-left-style:solid; border-left-color:rgb(221,221,221); font-size:14px"> 美观输出，如下面所示</td>
</tr>
</tbody>
</table>
<pre class="prettyprint xml" style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:rgb(51,51,51); margin-top:0px; margin-bottom:1.5em; line-height:1.5em; word-break:break-all; word-wrap:break-word; white-space:pre-wrap; overflow-y:auto; background-color:rgb(246,246,246)"><code style="padding:0.3em; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; border:0px; display:block; overflow-y:auto"><span class="tag" style="color:rgb(0,0,128)"><<span class="title">root</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">author</span> <span class="attribute" style="color:rgb(0,128,128)">name</span>=<span class="value" style="color:rgb(221,17,68)">"James"</span> <span class="attribute" style="color:rgb(0,128,128)">location</span>=<span class="value" style="color:rgb(221,17,68)">"UK"</span>></span>James Strachan<span class="tag" style="color:rgb(0,0,128)"></<span class="title">author</span>></span>
<span class="tag" style="color:rgb(0,0,128)"><<span class="title">author</span> <span class="attribute" style="color:rgb(0,128,128)">name</span>=<span class="value" style="color:rgb(221,17,68)">"Bob"</span> <span class="attribute" style="color:rgb(0,128,128)">location</span>=<span class="value" style="color:rgb(221,17,68)">"US"</span>></span>Bob McWhirter<span class="tag" style="color:rgb(0,0,128)"></<span class="title">author</span>></span>
<span class="tag" style="color:rgb(0,0,128)"></<span class="title">root</span>></span></code></pre>
<br>
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<div>一、报错内容Causedby:com.yomahub.liteflow.exception.ChainDuplicateException:[chainnameduplicate]chainName=categoryChallengeatcom.yomahub.liteflow.parser.helper.ParserHelper.lambda$null$0(ParserHelper.java:1</div>
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<a class="tag" taget="_blank" href="/search/Java%E5%AE%9E%E6%88%98%28%E8%BF%9B%E9%98%B6%E7%89%88%29/1.htm">Java实战(进阶版)</a><a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/Java%E9%9B%B6%E5%9F%BA%E7%A1%80%E5%85%A5%E9%97%A8/1.htm">Java零基础入门</a><a class="tag" taget="_blank" href="/search/Java%E5%B9%B6%E5%8F%91/1.htm">Java并发</a><a class="tag" taget="_blank" href="/search/%E7%BA%BF%E7%A8%8B%E6%B1%A0/1.htm">线程池</a><a class="tag" taget="_blank" href="/search/%E5%A4%9A%E7%BA%BF%E7%A8%8B%E7%AF%87/1.htm">多线程篇</a>
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<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E5%BC%80%E5%8F%91%E8%AF%AD%E8%A8%80/1.htm">开发语言</a><a class="tag" taget="_blank" href="/search/%E9%98%9F%E5%88%97/1.htm">队列</a>
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<span class="text-muted">安卓开发者</span>
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<div>jsonp 常用java方法
(1)以jsonp的形式返回:函数名(json字符串)
/***
* 用于jsonp调用
* @param map : 用于构造json数据
* @param callback : 回调的javascript方法名
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<a class="tag" taget="_blank" href="/search/%E5%A4%9A%E7%BA%BF%E7%A8%8B/1.htm">多线程</a>
<div>0
能不能简单描述一下你在java web开发中需要用到多线程编程的场景？0
对多线程有些了解，但是不太清楚具体的应用场景，能简单说一下你遇到的多线程编程的场景吗？
Java多线程
2012年11月23日 15:41 Young9007 Young9007
4
0 0 4
Comment添加评论关注(2)
3个答案 按时间排序 按投票排序
0
0
最典型的如：
1、</div>
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<div> 安装Maven后我们会在用户目录下发现.m2 文件夹。默认情况下，该文件夹下放置了Maven本地仓库.m2/repository。所有的Maven构件(artifact)都被存储到该仓库中，以方便重用。但是windows用户的操作系统都安装在C盘，把Maven仓库放到C盘是很危险的，为此我们需要修改Maven的本地仓库路径。
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<div>【前言】
自从html5引入placeholder后，问题就来了，
不支持html5的浏览器也先有这样的效果，
各种兼容，之前考虑，今天测试人员逮住不放，
想了个解决办法，看样子还行，记录一下。
【原理】
不使用placeholder，而是模拟placeholder的效果，
大概就是用focus和focusout效果。
【代码】
<scrip</div>
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<span class="text-muted">2002wmj</span>
<a class="tag" taget="_blank" href="/search/Debian/1.htm">Debian</a>
<div>1.将N个debian-506-amd64-DVD-N.iso存放于本地或其他媒介内，本例是放在本机/iso/目录下
2.创建N个挂载点目录
如下：
debian:~#mkdir –r /media/dvd1
debian:~#mkdir –r /media/dvd2
debian:~#mkdir –r /media/dvd3
….
debian:~#mkdir –r /media</div>
</li>
<li><a href="/article/645.htm"
title="SQLSERVER耗时最长的SQL" target="_blank">SQLSERVER耗时最长的SQL</a>
<span class="text-muted">357029540</span>
<a class="tag" taget="_blank" href="/search/SQL+Server/1.htm">SQL Server</a>
<div>对于DBA来说，经常要知道存储过程的某些信息：
1. 执行了多少次
2. 执行的执行计划如何
3. 执行的平均读写如何
4. 执行平均需要多少时间
列名 &</div>
</li>
<li><a href="/article/772.htm"
title="com/genuitec/eclipse/j2eedt/core/J2EEProjectUtil" target="_blank">com/genuitec/eclipse/j2eedt/core/J2EEProjectUtil</a>
<span class="text-muted">7454103</span>
<a class="tag" taget="_blank" href="/search/eclipse/1.htm">eclipse</a>
<div>今天eclipse突然报了com/genuitec/eclipse/j2eedt/core/J2EEProjectUtil 错误，并且工程文件打不开了，在网上找了一下资料，然后按照方法操作了一遍，好了，解决方法如下：
错误提示信息：
An error has occurred.See error log for more details.
Reason:
com/genuitec/</div>
</li>
<li><a href="/article/899.htm"
title="用正则删除文本中的html标签" target="_blank">用正则删除文本中的html标签</a>
<span class="text-muted">adminjun</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/html/1.htm">html</a><a class="tag" taget="_blank" href="/search/%E6%AD%A3%E5%88%99%E8%A1%A8%E8%BE%BE%E5%BC%8F/1.htm">正则表达式</a><a class="tag" taget="_blank" href="/search/%E5%8E%BB%E6%8E%89html%E6%A0%87%E7%AD%BE/1.htm">去掉html标签</a>
<div>使用文本编辑器录入文章存入数据中的文本是HTML标签格式，由于业务需要对HTML标签进行去除只保留纯净的文本内容，于是乎Java实现自动过滤。
如下：
public static String Html2Text(String inputString) {
String htmlStr = inputString; // 含html标签的字符串
String textSt</div>
</li>
<li><a href="/article/1026.htm"
title="嵌入式系统设计中常用总线和接口" target="_blank">嵌入式系统设计中常用总线和接口</a>
<span class="text-muted">aijuans</span>
<a class="tag" taget="_blank" href="/search/linux+%E5%9F%BA%E7%A1%80/1.htm">linux 基础</a>
<div> 嵌入式系统设计中常用总线和接口
任何一个微处理器都要与一定数量的部件和外围设备连接，但如果将各部件和每一种外围设备都分别用一组线路与CPU直接连接，那么连线</div>
</li>
<li><a href="/article/1153.htm"
title="Java函数调用方式——按值传递" target="_blank">Java函数调用方式——按值传递</a>
<span class="text-muted">ayaoxinchao</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E6%8C%89%E5%80%BC%E4%BC%A0%E9%80%92/1.htm">按值传递</a><a class="tag" taget="_blank" href="/search/%E5%AF%B9%E8%B1%A1/1.htm">对象</a><a class="tag" taget="_blank" href="/search/%E5%9F%BA%E7%A1%80%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B/1.htm">基础数据类型</a>
<div>Java使用按值传递的函数调用方式，这往往使我感到迷惑。因为在基础数据类型和对象的传递上，我就会纠结于到底是按值传递，还是按引用传递。其实经过学习，Java在任何地方，都一直发挥着按值传递的本色。
首先，让我们看一看基础数据类型是如何按值传递的。
public static void main(String[] args) {
int a = 2;
</div>
</li>
<li><a href="/article/1280.htm"
title="ios音量线性下降" target="_blank">ios音量线性下降</a>
<span class="text-muted">bewithme</span>
<a class="tag" taget="_blank" href="/search/ios%E9%9F%B3%E9%87%8F/1.htm">ios音量</a>
<div>直接上代码吧
//second 几秒内下降为0
- (void)reduceVolume:(int)second {
KGVoicePlayer *player = [KGVoicePlayer defaultPlayer];
if (!_flag) {
_tempVolume = player.volume;
</div>
</li>
<li><a href="/article/1407.htm"
title="与其怨它不如爱它" target="_blank">与其怨它不如爱它</a>
<span class="text-muted">bijian1013</span>
<a class="tag" taget="_blank" href="/search/%E9%80%89%E6%8B%A9/1.htm">选择</a><a class="tag" taget="_blank" href="/search/%E7%90%86%E6%83%B3/1.htm">理想</a><a class="tag" taget="_blank" href="/search/%E8%81%8C%E4%B8%9A/1.htm">职业</a><a class="tag" taget="_blank" href="/search/%E8%A7%84%E5%88%92/1.htm">规划</a>
<div> 抱怨工作是年轻人的常态，但爱工作才是积极的心态，与其怨它不如爱它。
一般来说，在公司干了一两年后，不少年轻人容易产生怨言，除了具体的埋怨公司“扭门”，埋怨上司无能以外，也有许多人是因为根本不爱自已的那份工作，工作完全成了谋生的手段，跟自已的性格、专业、爱好都相差甚远。
</div>
</li>
<li><a href="/article/1534.htm"
title="一边时间不够用一边浪费时间" target="_blank">一边时间不够用一边浪费时间</a>
<span class="text-muted">bingyingao</span>
<a class="tag" taget="_blank" href="/search/%E5%B7%A5%E4%BD%9C/1.htm">工作</a><a class="tag" taget="_blank" href="/search/%E6%97%B6%E9%97%B4/1.htm">时间</a><a class="tag" taget="_blank" href="/search/%E6%B5%AA%E8%B4%B9/1.htm">浪费</a>
<div>一方面感觉时间严重不够用，另一方面又在不停的浪费时间。
每一个周末，晚上熬夜看电影到凌晨一点，早上起不来一直睡到10点钟，10点钟起床，吃饭后玩手机到下午一点。
精神还是很差，下午像一直野鬼在城市里晃荡。
为何不尝试晚上10点钟就睡，早上7点就起，时间完全是一样的，把看电影的时间换到早上，精神好，气色好，一天好状态。
控制让自己周末早睡早起，你就成功了一半。
有多少个工作</div>
</li>
<li><a href="/article/1661.htm"
title="【Scala八】Scala核心二：隐式转换" target="_blank">【Scala八】Scala核心二：隐式转换</a>
<span class="text-muted">bit1129</span>
<a class="tag" taget="_blank" href="/search/scala/1.htm">scala</a>
<div>Implicits work like this: if you call a method on a Scala object, and the Scala compiler does not see a definition for that method in the class definition for that object, the compiler will try to con</div>
</li>
<li><a href="/article/1788.htm"
title="sudoku slover in Haskell (2)" target="_blank">sudoku slover in Haskell (2)</a>
<span class="text-muted">bookjovi</span>
<a class="tag" taget="_blank" href="/search/haskell/1.htm">haskell</a><a class="tag" taget="_blank" href="/search/sudoku/1.htm">sudoku</a>
<div>继续精简haskell版的sudoku程序，稍微改了一下，这次用了8行，同时性能也提高了很多，对每个空格的所有解不是通过尝试算出来的，而是直接得出。
board = [0,3,4,1,7,0,5,0,0,
0,6,0,0,0,8,3,0,1,
7,0,0,3,0,0,0,0,6,
5,0,0,6,4,0,8,0,7,
</div>
</li>
<li><a href="/article/1915.htm"
title="Java-Collections Framework学习与总结-HashSet和LinkedHashSet" target="_blank">Java-Collections Framework学习与总结-HashSet和LinkedHashSet</a>
<span class="text-muted">BrokenDreams</span>
<a class="tag" taget="_blank" href="/search/linkedhashset/1.htm">linkedhashset</a>
<div> 本篇总结一下两个常用的集合类HashSet和LinkedHashSet。
它们都实现了相同接口java.util.Set。Set表示一种元素无序且不可重复的集合；之前总结过的java.util.List表示一种元素可重复且有序</div>
</li>
<li><a href="/article/2042.htm"
title="读《研磨设计模式》-代码笔记-备忘录模式-Memento" target="_blank">读《研磨设计模式》-代码笔记-备忘录模式-Memento</a>
<span class="text-muted">bylijinnan</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E8%AE%BE%E8%AE%A1%E6%A8%A1%E5%BC%8F/1.htm">设计模式</a>
<div>声明： 本文只为方便我个人查阅和理解，详细的分析以及源代码请移步 原作者的博客http://chjavach.iteye.com/
import java.util.ArrayList;
import java.util.List;
/*
* 备忘录模式的功能是，在不破坏封装性的前提下，捕获一个对象的内部状态，并在对象之外保存这个状态，为以后的状态恢复作“备忘”
</div>
</li>
<li><a href="/article/2169.htm"
title="《RAW格式照片处理专业技法》笔记" target="_blank">《RAW格式照片处理专业技法》笔记</a>
<span class="text-muted">cherishLC</span>
<a class="tag" taget="_blank" href="/search/PS/1.htm">PS</a>
<div>注意，这不是教程！仅记录楼主之前不太了解的
一、色彩（空间）管理
作者建议采用ProRGB（色域最广），但camera raw中设为ProRGB，而PS中则在ProRGB的基础上，将gamma值设为了1.8（更符合人眼）
注意：bridge、camera raw怎么设置显示、输出的颜色都是正确的（会读取文件内的颜色配置文件），但用PS输出jpg文件时，必须先用Edit->conv</div>
</li>
<li><a href="/article/2296.htm"
title="使用 Git 下载 Spring 源码 编译 for Eclipse" target="_blank">使用 Git 下载 Spring 源码 编译 for Eclipse</a>
<span class="text-muted">crabdave</span>
<a class="tag" taget="_blank" href="/search/eclipse/1.htm">eclipse</a>
<div>使用 Git 下载 Spring 源码 编译 for Eclipse
1、安装gradle，下载 http://www.gradle.org/downloads
配置环境变量GRADLE_HOME，配置PATH %GRADLE_HOME%/bin，cmd，gradle -v
2、spring4 用jdk8 下载 https://jdk8.java.</div>
</li>
<li><a href="/article/2423.htm"
title="mysql连接拒绝问题" target="_blank">mysql连接拒绝问题</a>
<span class="text-muted">daizj</span>
<a class="tag" taget="_blank" href="/search/mysql/1.htm">mysql</a><a class="tag" taget="_blank" href="/search/%E7%99%BB%E5%BD%95%E6%9D%83%E9%99%90/1.htm">登录权限</a>
<div>mysql中在其它机器连接mysql服务器时报错问题汇总
一、[running]root@192.168.9.136:~$mysql -uroot -h 192.168.9.108 -p //带-p参数，在下一步进行密码输入
Enter password: //无字符串输入
ERROR 1045 (28000): Access </div>
</li>
<li><a href="/article/2550.htm"
title="Google Chrome 为何打压 H.264" target="_blank">Google Chrome 为何打压 H.264</a>
<span class="text-muted">dsjt</span>
<a class="tag" taget="_blank" href="/search/apple/1.htm">apple</a><a class="tag" taget="_blank" href="/search/html5/1.htm">html5</a><a class="tag" taget="_blank" href="/search/chrome/1.htm">chrome</a><a class="tag" taget="_blank" href="/search/Google/1.htm">Google</a>
<div>Google 今天在 Chromium 官方博客宣布由于 H.264 编解码器并非开放标准，Chrome 将在几个月后正式停止对 H.264 视频解码的支持，全面采用开放的 WebM 和 Theora 格式。
Google 在博客上表示，自从 WebM 视频编解码器推出以后，在性能、厂商支持以及独立性方面已经取得了很大的进步，为了与 Chromium 现有支持的編解码器保持一致，Chrome</div>
</li>
<li><a href="/article/2677.htm"
title="yii 获取控制器名 和方法名" target="_blank">yii 获取控制器名 和方法名</a>
<span class="text-muted">dcj3sjt126com</span>
<a class="tag" taget="_blank" href="/search/yii/1.htm">yii</a><a class="tag" taget="_blank" href="/search/framework/1.htm">framework</a>
<div>1. 获取控制器名
在控制器中获取控制器名: $name = $this->getId();
在视图中获取控制器名: $name = Yii::app()->controller->id;
2. 获取动作名
在控制器beforeAction()回调函数中获取动作名: $name = </div>
</li>
<li><a href="/article/2804.htm"
title="Android知识总结（二）" target="_blank">Android知识总结（二）</a>
<span class="text-muted">come_for_dream</span>
<a class="tag" taget="_blank" href="/search/android/1.htm">android</a>
<div>明天要考试了，速速总结如下
1、Activity的启动模式
standard：每次调用Activity的时候都创建一个（可以有多个相同的实例，也允许多个相同Activity叠加。）
singleTop：可以有多个实例，但是不允许多个相同Activity叠加。即，如果Ac</div>
</li>
<li><a href="/article/2931.htm"
title="高洛峰收徒第二期：寻找未来的“技术大牛” ——折腾一年，奖励20万元" target="_blank">高洛峰收徒第二期：寻找未来的“技术大牛” ——折腾一年，奖励20万元</a>
<span class="text-muted">gcq511120594</span>
<a class="tag" taget="_blank" href="/search/%E5%B7%A5%E4%BD%9C/1.htm">工作</a><a class="tag" taget="_blank" href="/search/%E9%A1%B9%E7%9B%AE%E7%AE%A1%E7%90%86/1.htm">项目管理</a>
<div>高洛峰，兄弟连IT教育合伙人、猿代码创始人、PHP培训第一人、《细说PHP》作者、软件开发工程师、《IT峰播》主创人、PHP讲师的鼻祖！
首期现在的进程刚刚过半，徒弟们真的很棒，人品都没的说，团结互助，学习刻苦，工作认真积极，灵活上进。我几乎会把他们全部留下来，现在已有一多半安排了实际的工作，并取得了很好的成绩。等他们出徒之日，凭他们的能力一定能够拿到高薪，而且我还承诺过一个徒弟，当他拿到大学毕</div>
</li>
<li><a href="/article/3058.htm"
title="linux expect" target="_blank">linux expect</a>
<span class="text-muted">heipark</span>
<a class="tag" taget="_blank" href="/search/expect/1.htm">expect</a>
<div>1. 创建、编辑文件go.sh
#!/usr/bin/expect
spawn sudo su admin
expect "*password*" { send "13456\r\n" }
interact
2. 设置权限
chmod u+x go.sh 3.</div>
</li>
<li><a href="/article/3185.htm"
title="Spring4.1新特性——静态资源处理增强" target="_blank">Spring4.1新特性——静态资源处理增强</a>
<span class="text-muted">jinnianshilongnian</span>
<a class="tag" taget="_blank" href="/search/spring+4.1/1.htm">spring 4.1</a>
<div>目录
Spring4.1新特性——综述
Spring4.1新特性——Spring核心部分及其他
Spring4.1新特性——Spring缓存框架增强
Spring4.1新特性——异步调用和事件机制的异常处理
Spring4.1新特性——数据库集成测试脚本初始化
Spring4.1新特性——Spring MVC增强
Spring4.1新特性——页面自动化测试框架Spring MVC T</div>
</li>
<li><a href="/article/3312.htm"
title="idea ubuntuxia 乱码" target="_blank">idea ubuntuxia 乱码</a>
<span class="text-muted">liyonghui160com</span>
<div>
1.首先需要在windows字体目录下或者其它地方找到simsun.ttf 这个 字体文件。
2.在ubuntu 下可以执行下面操作安装该字体：
sudo mkdir /usr/share/fonts/truetype/simsun
sudo cp simsun.ttf /usr/share/fonts/truetype/simsun
fc-cache -f -v
</div>
</li>
<li><a href="/article/3439.htm"
title="改良程序的11技巧" target="_blank">改良程序的11技巧</a>
<span class="text-muted">pda158</span>
<a class="tag" taget="_blank" href="/search/%E6%8A%80%E5%B7%A7/1.htm">技巧</a>
<div>有很多理由都能说明为什么我们应该写出清晰、可读性好的程序。最重要的一点，程序你只写一次，但以后会无数次的阅读。当你第二天回头来看你的代码 时，你就要开始阅读它了。当你把代码拿给其他人看时，他必须阅读你的代码。因此，在编写时多花一点时间，你会在阅读它时节省大量的时间。
让我们看一些基本的编程技巧：
尽量保持方法简短
永远永远不要把同一个变量用于多个不同的</div>
</li>
<li><a href="/article/3566.htm"
title="300个涵盖IT各方面的免费资源（下）——工作与学习篇" target="_blank">300个涵盖IT各方面的免费资源（下）——工作与学习篇</a>
<span class="text-muted">shoothao</span>
<a class="tag" taget="_blank" href="/search/%E5%88%9B%E4%B8%9A/1.htm">创业</a><a class="tag" taget="_blank" href="/search/%E5%85%8D%E8%B4%B9%E8%B5%84%E6%BA%90/1.htm">免费资源</a><a class="tag" taget="_blank" href="/search/%E5%AD%A6%E4%B9%A0%E8%AF%BE%E7%A8%8B/1.htm">学习课程</a><a class="tag" taget="_blank" href="/search/%E8%BF%9C%E7%A8%8B%E5%B7%A5%E4%BD%9C/1.htm">远程工作</a>
<div>工作与生产效率:
A. 背景声音
Noisli:背景噪音与颜色生成器。
Noizio:环境声均衡器。
Defonic:世界上任何的声响都可混合成美丽的旋律。
Designers.mx:设计者为设计者所准备的播放列表。
Coffitivity:这里的声音就像咖啡馆里放的一样。
B. 避免注意力分散
Self Co</div>
</li>
<li><a href="/article/3693.htm"
title="深入浅出RPC" target="_blank">深入浅出RPC</a>
<span class="text-muted">uule</span>
<a class="tag" taget="_blank" href="/search/rpc/1.htm">rpc</a>
<div>深入浅出RPC-浅出篇
深入浅出RPC-深入篇
RPC
Remote Procedure Call Protocol
远程过程调用协议
它是一种通过网络从远程计算机程序上请求服务，而不需要了解底层网络技术的协议。RPC协议假定某些传输协议的存在，如TCP或UDP，为通信程序之间携带信息数据。在OSI网络通信模型中，RPC跨越了传输层和应用层。RPC使得开发</div>
</li>
</ul>
</div>
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