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：