Java 序列化与反序列化

序列化

序列化：将对象转换为二进制序列在网络中传输或保存到磁盘

反序列化：从网络或磁盘中将二进制序列转换为对象

注意：

• 对象必须实现Serializable接口
  

• 对象的所有属性都要能序列化（Integer,Byte等都进行了序列化）

String

Integer

案例：

1.编写大象类

public class Elephant implements Serializable {
   
    private String name;
    private String age;
    private String sex;
  
    public Elephant(String name, String age, String sex) {
   
        this.name = name;
        this.age = age;
        this.sex = sex;
    }

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

    public String getName() {
   
        return name;
    }

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

    public String getAge() {
   
        return age;
    }

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

    public String getSex() {
   
        return sex;
    }

    public void setSex(String sex) {
   
        this.sex = sex;
    }
}

2.大象测试类

public class ElephantTest {
   
    public static  final  String PATH = "D:\\elephant";
    static  void write(Elephant elephant){
   
        //创建对象输出流
        try( ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream(PATH))) {
   
           //写入对象
            out.writeObject(elephant);
        } catch (IOException e) {
   
            e.printStackTrace();
        }
    }

    static Object read(){
   
        //创建对象输出流
        try( ObjectInputStream in = new ObjectInputStream(new FileInputStream(PATH))) {
   
            //写入对象
           return in.readObject();
        } catch (Exception e) {
   
            e.printStackTrace();
        }
        return null;
    }

    public static void main(String[] args) {
   
        Elephant elephant7 = new Elephant("小红象", "18", "男");
        write(elephant7);
      	Elephant elephant1 = (Elephant) read();
      	System.out.println(elephant1);
        System.out.println(elephant7);
        System.out.println(elephant1==elephant7);
    }
}

运行结果：

写入D盘的对象：