关于XMLEncoder和XMLDecoder

我们用XMLEncoder和XMLDecoder来序列化和反序列化一个类。

我觉得需要注意的是，我们在new一个对象的时候，XMLEncoder本身默认的是类中无参的构造函数，我今儿在实现的时候，老是报出exception,原来是我用有参的构造函数new了对象，改成set方法设置值，就ok了。

需要序列化的类：

package com.test.Bean;



import java.io.Serializable;



public class Customer implements Serializable {

	/**

	 * 

	 */

	private static final long serialVersionUID = 1L;

	private String name;

	private int age;

	public Customer(){

		

	}

	

	public Customer(String name, int age){

		this.name = name;

		this.age = age;

		

	}

	

	public String toString(){

		return "name=" + name + ", age=" + age;

	}



	public int getAge() {

		return age;

	}



	public void setAge(int age) {

		this.age = age;

	}



	public String getName() {

		return name;

	}



	public void setName(String name) {

		this.name = name;

	}

	

}

　　XMLEncoder和XMLDecoder的工具类：

package com.test.Serializable;



import java.beans.XMLDecoder;

import java.beans.XMLEncoder;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.UnsupportedEncodingException;



public class BeanXML {

	

	public static String encodeBean(Object bean){

		ByteArrayOutputStream out = new ByteArrayOutputStream();

		XMLEncoder encoder = new XMLEncoder(out);

		encoder.writeObject(bean);

		encoder.close();

		return out.toString();

	}

	

	public static Object decodeBean(String xml){

		XMLDecoder decoder;

		try {

			decoder = new XMLDecoder(new ByteArrayInputStream(xml.getBytes("GBK")));

			return decoder.readObject();

		} catch (UnsupportedEncodingException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		

		return null;

	}



}

　测试类：

package com.test.Serializable;

import com.citi.test.Bean.Customer;



public class TestBeanXML {

	

	public static void main(String[] args){

		Customer customer = new Customer();

		customer.setName("Ruth");

		customer.setAge(10);

		BeanXML testBeanXml = new BeanXML();

		testBeanXml.encodeBean(customer);

		//testBeanXml.decodeBean("ruth.xml");

		System.out.print(testBeanXml.encodeBean(customer));

		

//		testBeanXml.decodeBean(testBeanXml.encodeBean(customer));

//		System.out.println(testBeanXml.decodeBean(testBeanXml.encodeBean(customer)).getClass());

		

		Customer cust = (Customer) testBeanXml.decodeBean(testBeanXml.encodeBean(customer));

		System.out.print(cust.getName()+cust.getAge());

	}



}

　　测试结果：