JDOM解析XML

1.导入jdom包
2.JdomParse.java

package com.lijun.xml.jdom;

import java.io.File;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.util.List;

import org.jdom.Attribute;
import org.jdom.Comment;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.input.SAXBuilder;
import org.jdom.output.Format;
import org.jdom.output.XMLOutputter;

public class JdomParse {

	public static void main(String[] args) throws Exception {
		String fileName="output.xml";
		//生成XML
		createXML(fileName);
		//解析XML
		parserXML(fileName);
	}
	
	/**
	 * 创建XML
	 * @param fileName XML文件名
	 * @throws Exception
	 */
	private static void createXML(String fileName) throws Exception {
		//生成文档根节点
		Document document=new Document();
		//文档根元素
		Element root=new Element("root");
		//增加根元素到根节点
		document.addContent(root);
		
		//生成元素e1
		Element e1=new Element("e1");
		//在元素e1上增加注释
		e1.addContent(new Comment("this is commnet"));
		//在元素e1上增加子元素和子元素属性
		Attribute attr1=new Attribute("a2","2");
		e1.addContent(new Element("e11").setAttribute("a1","1").setAttribute(attr1));
		//将e1元素加载到根元素
		root.addContent(e1);
		
		//自定义格式化输出
		Format format=Format.getPrettyFormat();
		XMLOutputter out=new XMLOutputter(format);
		
		out.output(document,new FileOutputStream(fileName));
	}
	
	/**
	 * 解析XML
	 * @param fileName 文件名
	 * @throws Exception 
	 * @throws  
	 */
	private static void parserXML(String fileName) throws Exception{
		//创建JDOM解析器
		SAXBuilder builder=new SAXBuilder();
		//获得根节点
		Document doc=builder.build(new File(fileName));
		//获得根元素
		Element root=doc.getRootElement();
		
		System.out.println(root.getName());
		
		Element e11=root.getChild("e1").getChild("e11");
		
		System.out.println(e11.getText());
		
		List list=e11.getAttributes();
		
		for(int i=0;i<list.size();i++){
			Attribute attr=(Attribute)list.get(i);
			String attrName=attr.getName();
			String attrValue=attr.getValue();
			System.out.println(attrName+"="+attrValue);
		}
		
		root.removeChild("e1");
		
		//输出到新文件
		XMLOutputter output=new XMLOutputter();
		output.output(doc,new FileOutputStream("output2.xml"));
		//或用如下方法
		output.output(doc,new FileWriter("output3.xml"));
	}

}