Java中的XML操作

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <Language cat="it">
 3 
 4    <lan id="1">
 5         <name>Java</name>
 6         <ide>Eclipse</ide>
 7    </lan>
 8    <lan id="2">
 9         <name>Swift</name>
10         <ide>Xcode</ide>
11    </lan>
12    <lan id="3">
13         <name>C#</name>
14         <ide>Visual Studio</ide>
15    </lan>
16 
17 </Language>

 1 import java.io.File;
 2 import java.io.IOException;
 3 
 4 import javax.xml.parsers.DocumentBuilder;
 5 import javax.xml.parsers.DocumentBuilderFactory;
 6 import javax.xml.parsers.ParserConfigurationException;
 7 
 8 import org.w3c.dom.Document;
 9 import org.w3c.dom.Element;
10 import org.w3c.dom.Node;
11 import org.w3c.dom.NodeList;
12 import org.xml.sax.SAXException;
13 
14 public class TestReadXML {
15 
16     public static void main(String[] args) {
17         //DOM
18         try {
19             DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
20             DocumentBuilder builder =  factory.newDocumentBuilder();
21             Document document =  builder.parse(new File("languages.xml"));
22             Element root = document.getDocumentElement();//获取根元素
23             System.out.println("cat="+root.getAttribute("cat"));
24             NodeList list =    root.getElementsByTagName("lan");//获取子元素lan
25             for(int i=0;i<list.getLength();i++){
26                 Element lan = (Element) list.item(i);
27                 System.out.println("--------");
28                 System.out.println("id="+lan.getAttribute("id"));
29                 
30 //                Element name = (Element) lan.getElementsByTagName("name").item(0);//不使用这种方法
31 //                System.out.println("name="+name.getTextContent());
32                 
33                 NodeList clist = lan.getChildNodes();//获取lan的所有子元素
34                 for(int j=0;j<clist.getLength();j++){
35                     Node c = clist.item(j);
36                     if(c instanceof Element)
37                        System.out.println(c.getNodeName()+"="+c.getTextContent());
38                 }
39             }
40             
41         } catch (ParserConfigurationException e) {
42             
43             e.printStackTrace();
44         } catch (SAXException e) {
45 
46             e.printStackTrace();
47         } catch (IOException e) {
48 
49             e.printStackTrace();
50         }
51     }
52 
53 }