Java笔记——XML解析

 import java.io.File;
 import java.io.IOException;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.parsers.ParserConfigurationException;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 import org.xml.sax.SAXException;

 public class XmlTest {

     public static void main(String[] args) {

         try {

             DocumentBuilderFactory builderFactory = DocumentBuilderFactory
                     .newInstance();
             DocumentBuilder builder = builderFactory.newDocumentBuilder();
             Document document = builder.parse(new File("NewFile.xml"));
             Element root = document.getDocumentElement();
             System.out.println(root.getAttribute("name")+":");
             NodeList list = root.getElementsByTagName("student");
             for (int i = 0; i < list.getLength(); i++) {
                 Element student = (Element) list.item(i);
                 System.out.println("-----------------------");
                 System.out.println("id= " + student.getAttribute("id"));
                 NodeList clist = student.getChildNodes();
                 for (int j = 0; j < clist.getLength(); j++) {
                     Node c = clist.item(j);
                     if (c instanceof Element) {
                         System.out.println(c.getNodeName() + "="
                                 + c.getTextContent());
                     }
                 }
             }

         } catch (ParserConfigurationException e) {
             e.printStackTrace();
         } catch (SAXException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }

     }
 }

被解析的XML：

 <?xml version="1.0" encoding="UTF-8"?>
 <root name="StudentInformation">
     <student id="1">
         <name>张三</name>
         <address>北京</address>
     </student>
     <student id="2">
         <name>李四</name>
         <address>上海</address>
     </student>
     <student id="3">
         <name>王五</name>
         <address>广州</address>
     </student>
 </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