public class Person

    implements java.io.Serializable

{

    private String name;

    private int age;

    // 注意此处没有提供无参数的构造器!

    public Person(String name, int age)

    {

        System.out.println("有参数的构造器");

        this.name = name;

        this.age = age;

    }

    // 省略name与age的setter和getter方法

    // name的setter和getter方法

    public void setName(String name)

    {

        this.name = name;

    }

    public String getName()

    {

        return this.name;

    }

    // age的setter和getter方法

    public void setAge(int age)

    {

        this.age = age;

    }

    public int getAge()

    {

        return this.age;

    }

}

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.ObjectOutputStream;

public class WriteObject {

    public static void main(String[] args) {

        try {

            var oos = new ObjectOutputStream(new FileOutputStream("object.txt"));

            var per = new Person("孙武空",);

            oos.writeObject(per);

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.ObjectInputStream;

public class ReadObject {

    public static void main(String[] args) throws FileNotFoundException {

        try {

            var ois = new ObjectInputStream(new FileInputStream("object.txt"));

            var p = (Person)ois.readObject();

            System.out.println("name: " + p.getName() + " age : " + p.getAge());

        } catch (IOException e) {

            e.printStackTrace();

        } catch (ClassNotFoundException e) {

            e.printStackTrace();

        }

    }

}