Dom4j写XML

package com;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

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

public class Text {
  public static void main(String[] args) {
    //创建文档并设置文档根节点元素：第1种方式
//    Document document=DocumentHelper.createDocument();
//    Element root=DocumentHelper.createElement("student");
//    document.setRootElement(root);
      
    //创建文档并设置文档根节点元素：第2种方式
    Element root=DocumentHelper.createElement("student"); 
    Document document=DocumentHelper.createDocument(root);
    //在节点内添加属性
    root.addAttribute("name", "majun");
    //创建一个新的节点hello放在root下面
    Element  helloelement1=root.addElement("hello");
    //设置节点hello的内容为hello
    helloelement1.setText("hello");
    //设置输出的格式
    OutputFormat  format=new  OutputFormat("   ",true);
    XMLWriter writerxml;
    try {
        //输出
        writerxml = new XMLWriter(new FileOutputStream("mm.xml"),format);
        writerxml.write(document);
        
    } catch (UnsupportedEncodingException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (FileNotFoundException e1) {
        // TODO Auto-generated catch block
        e1.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    
}
}