Dom4J解析XML文档

<?xml version="1.0" encoding="UTF-8"?>
<students>
	<student>
		<name sn="01">张三</name>
		<age>18</age>
	</student>
	<student>
		<name sn="02">李四</name>
		<age>20</age>
	</student>
</students>

import java.io.File;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.ElementHandler;
import org.dom4j.ElementPath;
import org.dom4j.io.SAXReader;
/**
 * 在不读完XML文档的时候解析里面的数据
 * ElemnetHandler
 * ElementPath
 * @author Administrator
 *
 */

public class ElementHandlerTest {
	public static void main(String[] args){
		//创建一个SAXReader对象来读取XML文档
		SAXReader sax = new SAXReader();
		//ADD一个Handler,用于监听,当读到对应元素时,采取相应的onStart,onEnd里面编写的方法
		//还要指定路径,有相对的,也有绝对的,下面就是绝对的
		//StudentHandler()和NameHandler()都是绝内部类,都implement ElementHandler
		sax.addHandler("/students/student", new ElementHandlerTest.StudentHandler());
		try {
			//读取一个XML文档,返回一个Document对象
			//读的时候就监听
			sax.read(new File("students.xml"));
			
		} catch (DocumentException e) {
			e.printStackTrace();
		}
	}
	private static class StudentHandler implements ElementHandler{
		public void onStart(ElementPath elementPath) {
			//getCurrent()获得当前元素
			Element e = elementPath.getCurrent();
			//attributeValue("sn"))获得当前元素的sn属性
			System.out.println(e.attributeValue("sn"));
			//ElementPath里面也可以添加addHandler,这里面用的是相对路径
			elementPath.addHandler("name", new ElementHandlerTest.NameHandler());
		}

		public void onEnd(ElementPath elementPath) {
			elementPath.removeHandler("name");
		}
	}
	
	private static class NameHandler implements ElementHandler{
		public void onStart(ElementPath elementPath) {
			//获得当前路径
			System.out.println(elementPath.getPath());
		}
		public void onEnd(ElementPath elementPath) {
			
			Element e = elementPath.getCurrent();
			//获得元素的值和名字
			System.out.println(e.getName()+":"+e.getText());
		}
		
	}
}

一篇更加详细的
http://noknower.iteye.com/blog/269736