200_IO流_序列化版本号_serialVersionUID详解

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import java.io.Serializable;//因为User实现了Serializable 接口。JVM会特殊待遇，会给该类添加一个属性// static final long serialVersionUID = -5777248435420590281Lpublic class User implements Serializable {//不让系统自动生成，自己写一个序列化版本号private static final long serialVersionUID = -5777248435420590281L;String name;//如果不想让该属性参加序列化，需要使用transient关键字transient int  age;public User(String name, int age) {super();this.name = name;this.age = age;}@Overridepublic String toString() {return "User [name=" + name + ", age=" + age + "]";}  }

import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;public class Test {public static void main(String[] args) throws Exception {ObjectOutputStream  oos = new ObjectOutputStream(new FileOutputStream("bin/temp01"));User u1 = new User("张三",20);User u2 = new User("李四",30);oos.writeObject(u1);oos.writeObject(u2);oos.close();ObjectInputStream ois  = new ObjectInputStream(new FileInputStream("bin/temp01"));Object obs = ois.readObject();Object obs1 = ois.readObject();System.out.println(obs);System.out.println(obs1);ois.close();}}

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