dom4j 创建 并 写入 xml文件

package com.xml;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;
import org.xml.sax.SAXException;


public class Test02 {

	
	public static void main(String[] args) throws SAXException, IOException  {
		//路径及文件名称
		String path = "f:"+ File.separator + "t2.xml" ;
		//对象
		ArrayList<E> es = new ArrayList<E>();
		es.add(new E(1,"jack" , 20 , 8888.88)) ;
		es.add(new E(2,"mary" , 19 , 9999.88)) ;
		es.add(new E(1,"tom" , 20 , 7777.88)) ;
		//创建一个文档对象
		Document doc = DocumentHelper.createDocument();
		//添加根节点
		Element root = doc.addElement("List");
		//从对象中取出数据，在文档中添加节点和内容信息
		for (int i = 0; i < es.size(); i++) {
			Element element = root.addElement("E");
			element.addAttribute("id", es.get(i).getId()+"");
			element.addElement("name").setText(es.get(i).getName());
			element.addElement("age").setText(es.get(i).getAge()+"");
			element.addElement("salary").setText(es.get(i).getSalary()+"");
		}
		//格式化输出
		OutputFormat format = OutputFormat.createPrettyPrint();
		//将输出流有格式的写出到xml文档中
		XMLWriter w = new XMLWriter(new FileOutputStream(path) , format);
		w.write(doc);
		w.close();
		
	}
}
class E implements Serializable{
	private static final long serialVersionUID = 1L;
	private int id ; 
	private String name ;
	private int age ;
	private double salary ;
	public E() {
		super();
		// TODO Auto-generated constructor stub
	}
	public E(int id, String name, int age, double salary) {
		super();
		this.id = id;
		this.name = name;
		this.age = age;
		this.salary = salary;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public double getSalary() {
		return salary;
	}
	public void setSalary(double salary) {
		this.salary = salary;
	}
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + age;
		result = prime * result + id;
		result = prime * result + ((name == null) ? 0 : name.hashCode());
		long temp;
		temp = Double.doubleToLongBits(salary);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		return result;
	}
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		E other = (E) obj;
		if (age != other.age)
			return false;
		if (id != other.id)
			return false;
		if (name == null) {
			if (other.name != null)
				return false;
		} else if (!name.equals(other.name))
			return false;
		if (Double.doubleToLongBits(salary) != Double
				.doubleToLongBits(other.salary))
			return false;
		return true;
	}
	@Override
	public String toString() {
		return "E [age=" + age + ", id=" + id + ", name=" + name + ", salary="
				+ salary + "]";
	}
	
}