系列文章目录

文章目录

• ​​系列文章目录​​
• ​​一、是什么？​​
• ​​二、问题二​​
• ​​总结​​

一、是什么？

然后进行序列化

运行后我们发现报错了

说明一个问题

虽然Husband实现了Serializable，但是因为在序列化Husband过程中，包含wife对象，所以要求Wife类也要实现Serializable接口

二、问题二

为什么会出现这个问题

打印 自动调用 toString对象

死循环了

怎么解决呢？

解决办法：

Wife类也一样修改一下，这样就不会死循环了

总结

在序列化Husband对象，要求Wife序列化。
String类型也实现序列化接口
1、序列化一个对象时，要求它的属性要么是基本数据类型，如果是引用数据类型，这个引用数据类型也必须实现Serializable接口。
2、序列化一个数组，要求元素类型实现Serializable接口。
完整代码：

package com.atguigu.test03;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.junit.Test;

public class Test01序列化 {
  @Test
  public void test2() throws IOException, ClassNotFoundException{
    //反序列化Husband
  FileInputStream fis=new FileInputStream("marry.dat");
  ObjectInputStream ois= new ObjectInputStream(fis);
  Object o=ois.readObject();
  Husband h=(Husband)o;
  System.out.println(h);
    
  }
  @Test
  public void test1() throws IOException{
    //序列化Husband
    
    Husband h = new Husband();
    Wife w=new Wife();
    
    h.setName("李亮");
    w.setName("瞿月娇");
    
    h.setWife(w);
    w.setHusband(h);
    
    FileOutputStream fos = new FileOutputStream("marry.dat");
    ObjectOutputStream oos = new ObjectOutputStream(fos);
    
    oos.writeObject(h);
    oos.close();
    fos.close();
  }
}

Husband类：

package com.atguigu.test03;

import java.io.Serializable;

public class Husband implements Serializable {
  private static final long serialVersionUID=1L;
  private String name;
  private Wife wife;
  public Husband() {
    super();
  }
  public Husband(String name, Wife wife) {
    super();
    this.name = name;
    this.wife = wife;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public Wife getWife() {
    return wife;
  }
  public void setWife(Wife wife) {
    this.wife = wife;
  }
  @Override
  public String toString() {
    return "Husband [name=" + name + ", wife=" + wife.getName() + "]";
  }
  
  
}

Wife类

package com.atguigu.test03;

import java.io.Serializable;

public class Wife implements Serializable{
  private static final long serialVersionUID=1L;
  private String name;
  private Husband husband;
  public Wife() {
    super();
  }
  public Wife(String name, Husband husband) {
    super();
    this.name = name;
    this.husband = husband;
  }
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public Husband getHusband() {
    return husband;
  }
  public void setHusband(Husband husband) {
    this.husband = husband;
  }
  @Override
  public String toString() {
    return "Wife [name=" + name + ", husband=" + husband.getName() + "]";
  }
  
}