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:[e-mail] 
 *  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>