通过request拿到网页原源代码
通过re来提取想要的有效信息
import requests
import re
请求头
headers = {
"User-Agent": "Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (HTML, "
"like Gecko) Chrome/90.0.4430.93 Mobile Safari/537.36 "
}
预编译所有re表达式
sub = re.compile(r''?P.*?)">.*?</a><span>(?P<time>.*?)</span></li>'</span><span class="token punctuation">,</span> re<span class="token punctuation">.</span>S<span class="token punctuation">)</span>
detail_1 <span class="token operator">=</span> re<span class="token punctuation">.</span><span class="token builtin">compile</span><span class="token punctuation">(</span>r<span class="token string">'<div id="vsb_content_501">(?P<detail>.*?)<div id="div_vote_id">'</span><span class="token punctuation">,</span> re<span class="token punctuation">.</span>S<span class="token punctuation">)</span>
detail_1 <span class="token operator">=</span> re<span class="token punctuation">.</span><span class="token builtin">compile</span><span class="token punctuation">(</span>r<span class="token string">'<img border="0".*"></p>(?P<detail>.*?)<div id="div_vote_id">'</span><span class="token punctuation">,</span> re<span class="token punctuation">.</span>S<span class="token punctuation">)</span>
</code></pre>
<h1>爬取网页源代码</h1>
<h1>遍历389页新闻目录页</h1>
<pre><code class="prism language-python"><span class="token keyword">for</span> i <span class="token keyword">in</span> <span class="token builtin">range</span><span class="token punctuation">(</span><span class="token number">389</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">:</span>
</code></pre>
<p>在所写文档中将每页区内容区分开</p>
<pre><code class="prism language-python"> news <span class="token operator">=</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">"科院新闻.txt"</span><span class="token punctuation">,</span> <span class="token string">"a"</span><span class="token punctuation">,</span> encoding<span class="token operator">=</span><span class="token string">'utf-8'</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"*"</span><span class="token operator">*</span><span class="token number">10</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"第"</span><span class="token operator">+</span><span class="token builtin">str</span><span class="token punctuation">(</span><span class="token number">390</span><span class="token operator">-</span>i<span class="token punctuation">)</span><span class="token operator">+</span><span class="token string">"页"</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"*"</span><span class="token operator">*</span><span class="token number">10</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"\n"</span><span class="token operator">*</span><span class="token number">2</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>close<span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<p>在控制台输出进度</p>
<pre><code class="prism language-python"><span class="token keyword">print</span><span class="token punctuation">(</span><span class="token string">"第"</span><span class="token operator">+</span><span class="token builtin">str</span><span class="token punctuation">(</span><span class="token number">390</span><span class="token operator">-</span>i<span class="token punctuation">)</span><span class="token operator">+</span><span class="token string">"页新闻下载中"</span><span class="token punctuation">)</span>
</code></pre>
<p>获取每一页的源代码</p>
<pre><code class="prism language-python">url <span class="token operator">=</span> <span class="token string">"https://news.hist.edu.cn/kyyw/"</span><span class="token operator">+</span><span class="token builtin">str</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span><span class="token operator">+</span><span class="token string">".htm"</span>
resp <span class="token operator">=</span> requests<span class="token punctuation">.</span>get<span class="token punctuation">(</span>url<span class="token punctuation">,</span> headers<span class="token operator">=</span>headers<span class="token punctuation">)</span>
content <span class="token operator">=</span> resp<span class="token punctuation">.</span>content<span class="token punctuation">.</span>decode<span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<p>匹配所需内容</p>
<pre><code class="prism language-python"> result <span class="token operator">=</span> sub<span class="token punctuation">.</span>finditer<span class="token punctuation">(</span>content<span class="token punctuation">)</span>
</code></pre>
<p>调出并使用匹配到的内容</p>
<pre><code class="prism language-python"><span class="token keyword">for</span> it <span class="token keyword">in</span> result<span class="token punctuation">:</span>
title <span class="token operator">=</span> it<span class="token punctuation">.</span>group<span class="token punctuation">(</span><span class="token string">"title"</span><span class="token punctuation">)</span>
time <span class="token operator">=</span> it<span class="token punctuation">.</span>group<span class="token punctuation">(</span><span class="token string">"time"</span><span class="token punctuation">)</span>
half <span class="token operator">=</span> it<span class="token punctuation">.</span>group<span class="token punctuation">(</span><span class="token string">"content_url"</span><span class="token punctuation">)</span>
</code></pre>
<p>拼出接下来要前往的网页</p>
<pre><code class="prism language-python">whole <span class="token operator">=</span> <span class="token string">"https://news.hist.edu.cn/"</span> <span class="token operator">+</span> half
</code></pre>
<p>爬取新的网页的源代码</p>
<pre><code class="prism language-python">article <span class="token operator">=</span> requests<span class="token punctuation">.</span>get<span class="token punctuation">(</span>whole<span class="token punctuation">,</span> headers<span class="token operator">=</span>headers<span class="token punctuation">)</span>
detail_2 <span class="token operator">=</span> article<span class="token punctuation">.</span>content<span class="token punctuation">.</span>decode<span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<p>匹配所需内容</p>
<pre><code class="prism language-python">result2 <span class="token operator">=</span> detail_1<span class="token punctuation">.</span>finditer<span class="token punctuation">(</span>detail_2<span class="token punctuation">)</span>
</code></pre>
<p>创建科院新闻txt文档，<br> a：打开一个文件用于追加</p>
<pre><code class="prism language-python">news <span class="token operator">=</span> <span class="token builtin">open</span><span class="token punctuation">(</span><span class="token string">"科院新闻.txt"</span><span class="token punctuation">,</span> <span class="token string">"a"</span><span class="token punctuation">,</span> encoding<span class="token operator">=</span><span class="token string">'utf-8'</span><span class="token punctuation">)</span>
</code></pre>
<p>调出并处理匹配到的内容</p>
<pre><code class="prism language-python"> <span class="token keyword">for</span> mor <span class="token keyword">in</span> result2<span class="token punctuation">:</span>
content <span class="token operator">=</span> mor<span class="token punctuation">.</span>group<span class="token punctuation">(</span><span class="token string">"detail"</span><span class="token punctuation">)</span>
</code></pre>
<p>进行数据清洗</p>
<pre><code class="prism language-python"> content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'(0, 0, 0)'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'&'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'<'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'>'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'/'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'a'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'b'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'c'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'d'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'e'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'f'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'g'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'h'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'i'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'j'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'k'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'b'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'l'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'m'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'n'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'o'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'p'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'q'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'r'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'s'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'t'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'u'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'v'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'w'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'x'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'y'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'z'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'=":'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">';-:'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'=":'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">': "'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'="-'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'="_"'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
content <span class="token operator">=</span> content<span class="token punctuation">.</span>replace<span class="token punctuation">(</span><span class="token string">'\r\n'</span><span class="token punctuation">,</span> <span class="token string">''</span><span class="token punctuation">)</span>
</code></pre>
<p>写入标题，内容，时间</p>
<pre><code class="prism language-python"> news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"《"</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span>title<span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"》"</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"\n"</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span>content<span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"\n"</span><span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span>time<span class="token punctuation">)</span>
news<span class="token punctuation">.</span>write<span class="token punctuation">(</span><span class="token string">"\n"</span> <span class="token operator">*</span> <span class="token number">3</span><span class="token punctuation">)</span>
</code></pre>
<p>当我们写文件时，操作系统往往不会立刻把数据写入磁盘，而是放到内存缓存起来，空闲的时候再慢慢写入。<br> 只有调用close()方法时，操作系统才保证把没有写入的数据全部写入磁盘。忘记调用close()的后果是数据可能只写了一部分到磁盘，剩下的丢失了。</p>
<pre><code class="prism language-python"> news<span class="token punctuation">.</span>close<span class="token punctuation">(</span><span class="token punctuation">)</span>
</code></pre>
<blockquote>
<p>自己看完视频敲得，有很多操作可能有些沙雕，欢迎大佬在评论区指手画脚</p>
</blockquote>
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<a class="tag" taget="_blank" href="/search/Python%E7%BC%96%E7%A8%8B%E4%B9%8B%E9%81%93/1.htm">Python编程之道</a><a class="tag" taget="_blank" href="/search/python/1.htm">python</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/ai/1.htm">ai</a>
<div>PythonGradio：实现交互式图像编辑关键词：Python,Gradio,交互式图像编辑,计算机视觉,深度学习,图像处理,Web应用摘要：本文将深入探讨如何使用Python的Gradio库构建交互式图像编辑应用。我们将从基础概念开始，逐步介绍Gradio的核心功能，并通过实际代码示例展示如何实现各种图像处理功能。文章将涵盖图像滤镜应用、对象检测、风格迁移等高级功能，同时提供完整的项目实战案例</div>
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<div>ruby来写hadoop的mapreduce，我用的方法是rubydoop。怎么配置环境呢：
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不说了 网上有
2.安装ruby：
由于我以前是做ruby的，所以习惯性的先安装了ruby，起码调试起来比jruby快多了。
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rvm install jruby然后等待安</div>
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<span class="text-muted">百合不是茶</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E8%AE%BF%E9%97%AE%E6%8E%A7%E5%88%B6%E6%9D%83%E9%99%90/1.htm">访问控制权限</a><a class="tag" taget="_blank" href="/search/%E5%8D%95%E4%BE%8B%E6%A8%A1%E5%BC%8F/1.htm">单例模式</a>
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一:包访问权限;
自定义包:
package com.wj.control;
//包
public class Demo {
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System.out.println("调用</div>
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现在的餐馆里面出售的小龙虾,有一些是在野外捕捉的,这些小龙虾身体里面可能带有某些病毒和细菌,人食用以后可能会导致一些疾病,严重的甚至会死亡.....
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原因： tomcat7-maven-plugin 2.0 不知吃 jdk 1.8，换成 tomcat7-maven-plugin 2.2就行，即
<plugin>
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<div>前序:本人菜鸟，此文研究学习来自网络，各位牛牛多指教
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<span class="text-muted">aichenglong</span>
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<div>wordpress 使用侧边栏的小工具，很方便调整页面结构
小工具的制作过程
1 在自己的主题文件中新建一个文件夹(如widget)，在文件夹中创建一个php(AWP_posts-category.php)
小工具是一个类,想侧边栏一样，还得使用代码注册，他才可以再后台使用，基本的代码一层不变
<?php
class AWP_Post_Category extends WP_Wi</div>
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&nb</div>
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在 Aname类中申明三个属性，将其封装在一个类中：通过对象来调用
例如 1：
//属性 将其设为私有
姓名 name 可以公开
</div>
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<div>我想让radio来控制当前我选择的是机动车还是特种车，如下所示：
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js" type="text/javascript"><</div>
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<span class="text-muted">bijian1013</span>
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当使用一个GET请求获取JSON数组信息的时候（尤其是当这一信息非常敏感，</div>
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<a class="tag" taget="_blank" href="/search/maven/1.htm">maven</a>
<div>基于Maven的web项目的标准项目结构
user-project
user-core
user-service
user-web
src
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<a class="tag" taget="_blank" href="/search/hive/1.htm">hive</a>
<div>用户自定义聚合函数，用户提供的多个入参通过聚合计算(求和、求最大值、求最小值)得到一个聚合计算结果的函数。
问题：UDF也可以提供输入多个参数然后输出一个结果的运算，比如加法运算add(3，5)，add这个UDF需要实现UDF的evaluate方法,那么UDF和UDAF的实质分别究竟是什么？
Double evaluate(Double a, Double b)
</div>
</li>
<li><a href="/article/1806.htm"
title="通过 nginx-lua 给 Nginx 增加 OAuth 支持" target="_blank">通过 nginx-lua 给 Nginx 增加 OAuth 支持</a>
<span class="text-muted">ronin47</span>
<div>前言：我们使用Nginx的Lua中间件建立了OAuth2认证和授权层。如果你也有此打算，阅读下面的文档，实现自动化并获得收益。SeatGeek 在过去几年中取得了发展，我们已经积累了不少针对各种任务的不同管理接口。我们通常为新的展示需求创建新模块，比如我们自己的博客、图表等。我们还定期开发内部工具来处理诸如部署、可视化操作及事件处理等事务。在处理这些事务中，我们使用了几个不同的接口来认证：
&n</div>
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title="利用tomcat-redis-session-manager做session同步时自定义类对象属性保存不上的解决方法" target="_blank">利用tomcat-redis-session-manager做session同步时自定义类对象属性保存不上的解决方法</a>
<span class="text-muted">bsr1983</span>
<a class="tag" taget="_blank" href="/search/session/1.htm">session</a>
<div>在利用tomcat-redis-session-manager做session同步时，遇到了在session保存一个自定义对象时，修改该对象中的某个属性，session未进行序列化，属性没有被存储到redis中。 在 tomcat-redis-session-manager的github上有如下说明： Session Change Tracking
As noted in the &qu</div>
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<li><a href="/article/2060.htm"
title="《代码大全》表驱动法-Table Driven Approach-1" target="_blank">《代码大全》表驱动法-Table Driven Approach-1</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/%E7%AE%97%E6%B3%95/1.htm">算法</a>
<div>关于Table Driven Approach的一篇非常好的文章：
http://www.codeproject.com/Articles/42732/Table-driven-Approach
package com.ljn.base;
import java.util.Random;
public class TableDriven {
public </div>
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title="Sybase封锁原理" target="_blank">Sybase封锁原理</a>
<span class="text-muted">chicony</span>
<a class="tag" taget="_blank" href="/search/Sybase/1.htm">Sybase</a>
<div> 昨天在操作Sybase IQ12.7时意外操作造成了数据库表锁定，不能删除被锁定表数据也不能往其中写入数据。由于着急往该表抽入数据，因此立马着手解决该表的解锁问题。 无奈此前没有接触过Sybase IQ12.7这套数据库产品，加之当时已属于下班时间无法求助于支持人员支持，因此只有借助搜索引擎强大的</div>
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<li><a href="/article/2314.htm"
title="java异常处理机制" target="_blank">java异常处理机制</a>
<span class="text-muted">CrazyMizzz</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a>
<div>java异常关键字有以下几个，分别为 try catch final throw throws
他们的定义分别为
try： Opening exception-handling statement.
catch： Captures the exception.
finally： Runs its code before terminating</div>
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<li><a href="/article/2441.htm"
title="hive 数据插入DML语法汇总" target="_blank">hive 数据插入DML语法汇总</a>
<span class="text-muted">daizj</span>
<a class="tag" taget="_blank" href="/search/hive/1.htm">hive</a><a class="tag" taget="_blank" href="/search/DML/1.htm">DML</a><a class="tag" taget="_blank" href="/search/%E6%95%B0%E6%8D%AE%E6%8F%92%E5%85%A5/1.htm">数据插入</a>
<div>Hive的数据插入DML语法汇总1、Loading files into tables语法：1) LOAD DATA [LOCAL] INPATH 'filepath' [OVERWRITE] INTO TABLE tablename [PARTITION (partcol1=val1, partcol2=val2 ...)]解释：1)、上面命令执行环境为hive客户端环境下： hive>l</div>
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<li><a href="/article/2568.htm"
title="工厂设计模式" target="_blank">工厂设计模式</a>
<span class="text-muted">dcj3sjt126com</span>
<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> 使用设计模式是促进最佳实践和良好设计的好办法。设计模式可以提供针对常见的编程问题的灵活的解决方案。 工厂模式
工厂模式（Factory）允许你在代码执行时实例化对象。它之所以被称为工厂模式是因为它负责“生产”对象。工厂方法的参数是你要生成的对象对应的类名称。
Example #1 调用工厂方法（带参数）
<?phpclass Example{ </div>
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<li><a href="/article/2695.htm"
title="mysql字符串查找函数" target="_blank">mysql字符串查找函数</a>
<span class="text-muted">dcj3sjt126com</span>
<a class="tag" taget="_blank" href="/search/mysql/1.htm">mysql</a>
<div>
FIND_IN_SET(str,strlist)
假如字符串str 在由N 子链组成的字符串列表strlist 中，则返回值的范围在1到 N 之间。一个字符串列表就是一个由一些被‘,’符号分开的自链组成的字符串。如果第一个参数是一个常数字符串，而第二个是type SET列，则 FIND_IN_SET() 函数被优化，使用比特计算。如果str不在strlist 或st</div>
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<li><a href="/article/2822.htm"
title="jvm内存管理" target="_blank">jvm内存管理</a>
<span class="text-muted">easterfly</span>
<a class="tag" taget="_blank" href="/search/jvm/1.htm">jvm</a>
<div>一、JVM堆内存的划分
分为年轻代和年老代。年轻代又分为三部分：一个eden,两个survivor。
工作过程是这样的：e区空间满了后，执行minor gc，存活下来的对象放入s0, 对s0仍会进行minor gc，存活下来的的对象放入s1中，对s1同样执行minor gc，依旧存活的对象就放入年老代中；
年老代满了之后会执行major gc，这个是stop the word模式，执行</div>
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<li><a href="/article/2949.htm"
title="CentOS-6.3安装配置JDK-8" target="_blank">CentOS-6.3安装配置JDK-8</a>
<span class="text-muted">gengzg</span>
<a class="tag" taget="_blank" href="/search/centos/1.htm">centos</a>
<div>JAVA_HOME=/usr/java/jdk1.8.0_45
JRE_HOME=/usr/java/jdk1.8.0_45/jre
PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib
export JAVA_HOME</div>
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<li><a href="/article/3076.htm"
title="【转】关于web路径的获取方法" target="_blank">【转】关于web路径的获取方法</a>
<span class="text-muted">huangyc1210</span>
<a class="tag" taget="_blank" href="/search/Web/1.htm">Web</a><a class="tag" taget="_blank" href="/search/%E8%B7%AF%E5%BE%84/1.htm">路径</a>
<div>假定你的web application 名称为news,你在浏览器中输入请求路径： http://localhost:8080/news/main/list.jsp 则执行下面向行代码后打印出如下结果： 1、 System.out.println(request.getContextPath()); //可返回站点的根路径。也就是项</div>
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<li><a href="/article/3203.htm"
title="php里获取第一个中文首字母并排序" target="_blank">php里获取第一个中文首字母并排序</a>
<span class="text-muted">远去的渡口</span>
<a class="tag" taget="_blank" href="/search/%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84/1.htm">数据结构</a><a class="tag" taget="_blank" href="/search/PHP/1.htm">PHP</a>
<div>很久没来更新博客了，还是觉得工作需要多总结的好。今天来更新一个自己认为比较有成就的问题吧。 最近在做储值结算，需求里结算首页需要按门店的首字母A-Z排序。我的数据结构原本是这样的：
Array
(
[0] => Array
(
[sid] => 2885842
[recetcstoredpay] =&g</div>
</li>
<li><a href="/article/3330.htm"
title="java内部类" target="_blank">java内部类</a>
<span class="text-muted">hm4123660</span>
<a class="tag" taget="_blank" href="/search/java/1.htm">java</a><a class="tag" taget="_blank" href="/search/%E5%86%85%E9%83%A8%E7%B1%BB/1.htm">内部类</a><a class="tag" taget="_blank" href="/search/%E5%8C%BF%E5%90%8D%E5%86%85%E9%83%A8%E7%B1%BB/1.htm">匿名内部类</a><a class="tag" taget="_blank" href="/search/%E6%88%90%E5%91%98%E5%86%85%E9%83%A8%E7%B1%BB/1.htm">成员内部类</a><a class="tag" taget="_blank" href="/search/%E6%96%B9%E6%B3%95%E5%86%85%E9%83%A8%E7%B1%BB/1.htm">方法内部类</a>
<div> 在Java中，可以将一个类定义在另一个类里面或者一个方法里面，这样的类称为内部类。内部类仍然是一个独立的类，在编译之后内部类会被编译成独立的.class文件，但是前面冠以外部类的类名和$符号。内部类可以间接解决多继承问题,可以使用内部类继承一个类，外部类继承一个类，实现多继承。
&nb</div>
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<li><a href="/article/3457.htm"
title="Caused by: java.lang.IncompatibleClassChangeError: class org.hibernate.cfg.Exten" target="_blank">Caused by: java.lang.IncompatibleClassChangeError: class org.hibernate.cfg.Exten</a>
<span class="text-muted">zhb8015</span>
<div>maven pom.xml关于hibernate的配置和异常信息如下，查了好多资料，问题还是没有解决。只知道是包冲突，就是不知道是哪个包....遇到这个问题的分享下是怎么解决的。。
maven pom:
<dependency>
<groupId>org.hibernate</groupId>
<ar</div>
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<li><a href="/article/3584.htm"
title="Spark 性能相关参数配置详解－任务调度篇" target="_blank">Spark 性能相关参数配置详解－任务调度篇</a>
<span class="text-muted">Stark_Summer</span>
<a class="tag" taget="_blank" href="/search/spark/1.htm">spark</a><a class="tag" taget="_blank" href="/search/cache/1.htm">cache</a><a class="tag" taget="_blank" href="/search/cpu/1.htm">cpu</a><a class="tag" taget="_blank" href="/search/%E4%BB%BB%E5%8A%A1%E8%B0%83%E5%BA%A6/1.htm">任务调度</a><a class="tag" taget="_blank" href="/search/yarn/1.htm">yarn</a>
<div>随着Spark的逐渐成熟完善, 越来越多的可配置参数被添加到Spark中来, 本文试图通过阐述这其中部分参数的工作原理和配置思路, 和大家一起探讨一下如何根据实际场合对Spark进行配置优化。
由于篇幅较长，所以在这里分篇组织，如果要看最新完整的网页版内容，可以戳这里：http://spark-config.readthedocs.org/，主要是便</div>
</li>
<li><a href="/article/3711.htm"
title="css3滤镜" target="_blank">css3滤镜</a>
<span class="text-muted">wangkeheng</span>
<a class="tag" taget="_blank" href="/search/html/1.htm">html</a><a class="tag" taget="_blank" href="/search/css/1.htm">css</a>
<div>经常看到一些网站的底部有一些灰色的图标，鼠标移入的时候会变亮，开始以为是js操作src或者bg呢，搜索了一下，发现了一个更好的方法：通过css3的滤镜方法。
html代码：
<a href='' class='icon'><img src='utv.jpg' /></a>
css代码：
.icon{-webkit-filter: graysc</div>
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