使用Dom4j对XML进行增删改查

使用Dom4j对XML进行增删改查非常简单，这里就不多说废话，下面上代码

package com.bird.dom4j;

import java.io.FileOutputStream;
import java.io.OutputStreamWriter;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

/**
 * @use 使用Dom4j对指定标签增加内容
 * @author Bird
 *
 */
public class DomAdd {
	@SuppressWarnings("unchecked")
	public static void add() throws Exception{
		SAXReader reader = new SAXReader();
		Document document = reader.read("d://book.xml");
		
		Element book = document.getRootElement().element("书");
		List list = book.elements();
		
		Element price = DocumentHelper.createElement("售价");
		price.setText("999元");
		list.add(2, price);
		
		OutputFormat former =OutputFormat.createPrettyPrint();//设置格式化输出器
		former.setEncoding("UTF-8");
		
		XMLWriter writer = new XMLWriter(new OutputStreamWriter(new FileOutputStream("d://book.xml"),"UTF-8"),former);
		writer.write(document);
		writer.close();
	}
	
	
	public static void delete() throws Exception{
		SAXReader reader = new SAXReader();
		Document document = reader.read("d://book.xml");
		
		Element price = document.getRootElement().element("书").element("售价");
		price.getParent().remove(price);
		
		OutputFormat format = OutputFormat.createPrettyPrint();
		format.setEncoding("UTF-8");
		
		XMLWriter writer = new XMLWriter(new FileOutputStream("d://book.xml"),format);
		writer.write(document);
		writer.close();
	}
	
	public static void update() throws Exception{
		SAXReader reader = new SAXReader();
		Document document = reader.read("d://book.xml");
		
		Element price = document.getRootElement().element("书").element("售价");
		price.setText("10086元");
		
		OutputFormat format = OutputFormat.createPrettyPrint();
		format.setEncoding("UTF-8");
		
		XMLWriter writer = new XMLWriter(new FileOutputStream("d://book.xml"),format);
		writer.write(document);
		writer.close();
	}
	
	public static void main(String[] args) throws Exception{
//		add();
//		delete();
		update();
	}
}