1.准备要序列化的类User

(这个类必须实现Serializable接口，该接口只起到一个标记作用，没有任何抽象方法)

package cn.qdm.ceshi;

import java.io.Serializable;

public class User implements Serializable{

private String name;

private Integer age;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public Integer getAge() {

return age;

}

public void setAge(Integer age) {

this.age = age;

}

@Override

public String toString() {

return "User [name=" + name + ", age=" + age + "]";

}

public User(String name, Integer age) {

super();

this.name = name;

this.age = age;

}

public User() {

super();

// TODO Auto-generated constructor stub

}

}

2. 测试代码

package cn.qdm.ceshi;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

public class Ceshi {

public static void main(String[] args) {

ObjectOutputStream objectOutputStream = null;

try {

objectOutputStream = new ObjectOutputStream(new FileOutputStream(new File("D://obj")));

objectOutputStream.writeObject(new User("张三", 18));

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}finally {

try {

objectOutputStream.close();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

try {

ObjectInputStream objectInputStream = newObjectInputStream(new FileInputStream(new File("D://obj")));

try {

User user = (User) objectInputStream.readObject();

System.out.println(user);

objectInputStream.close();

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}