Java笔记——XML解析

 1 import java.io.File;

 2 import java.io.IOException;

 3 import javax.xml.parsers.DocumentBuilder;

 4 import javax.xml.parsers.DocumentBuilderFactory;

 5 import javax.xml.parsers.ParserConfigurationException;

 6 import org.w3c.dom.Document;

 7 import org.w3c.dom.Element;

 8 import org.w3c.dom.Node;

 9 import org.w3c.dom.NodeList;

10 import org.xml.sax.SAXException;

11 

12 public class XmlTest {

13 

14     public static void main(String[] args) {

15 

16         try {

17             

18             DocumentBuilderFactory builderFactory = DocumentBuilderFactory

19                     .newInstance();

20             DocumentBuilder builder = builderFactory.newDocumentBuilder();

21             Document document = builder.parse(new File("NewFile.xml"));

22             Element root = document.getDocumentElement();

23             System.out.println(root.getAttribute("name")+":");

24             NodeList list = root.getElementsByTagName("student");

25             for (int i = 0; i < list.getLength(); i++) {

26                 Element student = (Element) list.item(i);

27                 System.out.println("-----------------------");

28                 System.out.println("id= " + student.getAttribute("id"));

29                 NodeList clist = student.getChildNodes();

30                 for (int j = 0; j < clist.getLength(); j++) {

31                     Node c = clist.item(j);

32                     if (c instanceof Element) {

33                         System.out.println(c.getNodeName() + "="

34                                 + c.getTextContent());

35                     }

36                 }

37             }

38 

39         } catch (ParserConfigurationException e) {

40             e.printStackTrace();

41         } catch (SAXException e) {

42             e.printStackTrace();

43         } catch (IOException e) {

44             e.printStackTrace();

45         }

46 

47     }

48 }

被解析的XML：

 1 <?xml version="1.0" encoding="UTF-8"?>

 2 <root name="StudentInformation">

 3     <student id="1">

 4         <name>张三</name>

 5         <address>北京</address>

 6     </student>

 7     <student id="2">

 8         <name>李四</name>

 9         <address>上海</address>

10     </student>

11     <student id="3">

12         <name>王五</name>

13         <address>广州</address>

14     </student>

15 </root>

 

显示结果：

StudentInformation:
-----------------------
id= 1
name=张三
address=北京
-----------------------
id= 2
name=李四
address=上海
-----------------------
id= 3
name=王五
address=广州