Dom 解析xml(二)

<?xml version="1.0" encoding="UTF-8"?>
<books>
    <book id="001">
         <name>love you</name>
         <price>20.5</price>
     </book>
     <book id="002"> 
         <name>hurt my heart</name>
         <price>27.5</price>
     </book>
</books>

package com.test;

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;
/**  
 * DOM解析XML  
 * 通过获取子节点方法  
 * @author kai
 */ 
public class DomXML {
    public static void main(String[] args) {
         DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();   
            System.out.println(dbf.getClass().getName());   
               
            try {   
                DocumentBuilder db=dbf.newDocumentBuilder();   
                //读取文件   
                Document doc=db.parse(new File("book.xml"));   
                //获取子节点   
                NodeList nl=doc.getElementsByTagName("book");   
                int len=nl.getLength();   
                //获取节点数   
                System.out.println("节点数:"+len);   
                for(int i=0;i<len;i++)   
                {   
                    Element eltStu=(Element)nl.item(i);   
                       
                    Node eltName=eltStu.getElementsByTagName("name").item(0);   
                    Node eltAge=eltStu.getElementsByTagName("price").item(0);   
                       
                    String name=eltName.getFirstChild().getNodeValue();   
                    String price=eltAge.getFirstChild().getNodeValue();   
                       
                    System.out.println("name: "+name);   
                    System.out.println("price: "+price);   
                    System.out.println("-------------------------");   
                }   
            } catch (ParserConfigurationException e) {   
                e.printStackTrace();   
            }catch (SAXException e) {   
                e.printStackTrace();   
            } catch (IOException e) {   
                e.printStackTrace();   
            }   
    }
}