Dom4j操作XML文件---写文件

package com.beckham.dom;
import java.io.File;
import java.io.FileWriter;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
/**
*  @author 作者<Beckham>
*  Email:gaowm0207@gmail.com
*  Jan 28, 2010   10:03:12 AM
*  DOM4j写XML文件
*/
public class CreateXMLFile {
public static void main(String[] args)throws Exception {
createFile("src/com/beckham/dom/application.xml") ;
}

public static void createFile(String fileName) throws Exception{

Document document = DocumentHelper.createDocument() ;
//根节点
Element root = document.addElement("beans") ;
//根节点注释
root.addComment("这是根节点") ;

//第一个子节点
Element elementBean1 = root.addElement("bean") ;
elementBean1.addAttribute("id", "boy") ;
elementBean1.addAttribute("class", "com.beckham.spring.Boy") ;
Element elementProp = elementBean1.addElement("property") ;
elementProp.addAttribute("name", "user") ;
elementProp.addAttribute("ref", "com.beckham.User") ;

//第二个子节点
Element elementBean2 = root.addElement("bean") ;
elementBean2.addAttribute("id", "girl") ;
elementBean2.addAttribute("class", "com.beckham.spring.Girl") ;
Element elementProp2 = elementBean2.addElement("property") ;
elementProp2.addAttribute("name", "user") ;
elementProp2.addAttribute("ref", "com.beckham.User") ;

//前一个参数表示缩进4个空格
OutputFormat format = new OutputFormat("    ",true) ;

format.setEncoding("GBK") ;

XMLWriter w = new XMLWriter(new FileWriter(new File(fileName)),format ) ;

w.write(document) ;
w.close() ;
}

}

<?xml version="1.0" encoding="GBK"?>
<beans>
<!--这是根节点-->
<bean id="boy" class="com.beckham.spring.Boy">
<property name="user" ref="com.beckham.User"/>
</bean>
<bean id="girl" class="com.beckham.spring.Girl">
<property name="user" ref="com.beckham.User"/>
</bean>
</beans>