Java解析XML格式数据的方法详解

import java.io.*;  
import org.w3c.dom.*;  
import org.xml.sax.SAXException;  
import javax.xml.parsers.*;  
public class Xml {  
  public static void main(String[] args) {  
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();  
    try {  
      DocumentBuilder builder = factory.newDocumentBuilder();  
      Document doc = builder.parse(new File("E:\\work\\test\\xml1.xml"));  
      NodeList nl = doc.getElementsByTagName("book");  
      for (int i = 0; i < nl.getLength(); i++) {  
        System.out.println(nl.item(i).getAttributes().item(0));  
        System.out.println(doc.getElementsByTagName("title").item(i)  
            .getFirstChild().getNodeValue());  
        System.out.println(doc.getElementsByTagName("title").item(i)  
            .getAttributes().item(0));  
        System.out.println(doc.getElementsByTagName("author").item(i)  
            .getFirstChild().getNodeValue());  
        System.out.println(doc.getElementsByTagName("year").item(i)  
            .getFirstChild().getNodeValue());  
        System.out.println(doc.getElementsByTagName("price").item(i)  
            .getFirstChild().getNodeValue());  
        System.out.println();  
      }  
    } catch (ParserConfigurationException e) {  
      e.printStackTrace();  
    } catch (SAXException e) {  
      e.printStackTrace();  
    } catch (IOException e) {  
      e.printStackTrace();  
    }  
  }  
}  

<bookstore> 
<book category="COOKING"> 
 <title lang="en">Everyday Italian</title> 
 <author>Giada De Laurentiis</author> 
 <year>2005</year> 
 <price>30.00</price> 
</book> 
<book category="CHILDREN"> 
 <title lang="en">Harry Potter</title> 
 <author>J K. Rowling</author> 
 <year>2005</year> 
 <price>29.99</price> 
</book> 
<book category="WEB"> 
 <title lang="en">Learning XML</title> 
 <author>Erik T. Ray</author> 
 <year>2003</year> 
 <price>39.95</price> 
</book> 
</bookstore>

category="COOKING"
Everyday Italian
lang="en"
Giada De Laurentiis
2005
30.00

category="CHILDREN"
Harry Potter
lang="en"
J K. Rowling
2005
29.99

category="WEB"
Learning XML
lang="en"
Erik T. Ray
2003
39.95