IO流17 --- 对象流操作自定义对象 --- 技术搬运工（尚硅谷）

序列化

@Test
public void test14() throws IOException {
    ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("object1.dat"));
    oos.writeObject(new Person("张三", 20));
    oos.close();
}

反序列化

@Test
public void test15() throws IOException, ClassNotFoundException {
    ObjectInputStream ois = new ObjectInputStream(new FileInputStream("object1.dat"));
    Person p = (Person) ois.readObject();
    System.out.println(p);
    ois.close();
}

自定义的Person类。

1.实现Serializable接口，

2.提供序列版本号serialVersionUID，

3.类的属性也必须是可序列化的。

4.其中static（类所有）和transient修饰的属性不会被序列化。

package com.atguigu.java.pojo;

import java.io.Serializable;

public class Person implements Serializable {
    private static final long serialVersionUID = 487667876562L;
    private String name;
    private int age;

    public Person() {
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}