serialVersionUID

public class JustForTest implements Serializable {
    private static final long serialVersionUID = 2482473919699123967L;

    public static void main(String[] args){
        StringBuffer sb = new StringBuffer();
    }
}

package tjq.demo.controller;

import java.io.*;

public class Servial_Test{

    public static void servial(Object object) throws FileNotFoundException,IOException{
        File file = new File("/Users/Sirius/Documents/test.txt");
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(file));
        out.writeObject(object);
        System.out.println("序列化成功！");
        out.close();
    }

    public static void deservial() throws FileNotFoundException,IOException,ClassNotFoundException{
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream("/Users/Sirius/Documents/test.txt"));
        Object object = ois.readObject();
        System.out.println("反序列化成功！");
        System.out.println(object);
        ois.close();
    }

    public static void main(String[] args) throws IOException,ClassNotFoundException{
        JustForTest justForTest = new JustForTest();
        justForTest.setName("辛普森");
        justForTest.setAge(25);
        servial(justForTest);
        deservial();
    }
}