Java序列化与serialVersionUID生成方法详解

import java.io.Serializable;

public class Person implements Serializable {
    // 手动指定 serialVersionUID
    private static final long serialVersionUID = 1234567890123456789L;

    private String name;
    private int age;

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

    // Getter 和 Setter 方法省略
}

import java.io.Serializable;
import java.util.Random;

public class Employee implements Serializable {
    // 使用随机数生成 serialVersionUID
    private static final long serialVersionUID = new Random().nextLong();

    private String id;
    private String name;
    private double salary;

    public Employee(String id, String name, double salary) {
        this.id = id;
        this.name = name;
        this.salary = salary;
    }

    // Getter 和 Setter 方法省略
}

serialver

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;

public class SerializationExample {
    public static void main(String[] args) {
        Person person = new Person("John Doe", 30);

        try {
            // 创建 ObjectOutputStream 对象
            ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("person.ser"));
            // 序列化对象
            out.writeObject(person);
            out.close();
            System.out.println("对象已序列化到 person.ser 文件");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import java.io.File;
import java.io.FileInputStream;
import java.io.ObjectInputStream;

public class DeserializationExample {
    public static void main(String[] args) {
        File file = new File("person.ser");

        if (file.exists()) {
            try {
                // 创建 ObjectInputStream 对象
                ObjectInputStream in = new ObjectInputStream(new FileInputStream(file));
                // 反序列化对象
                Person person = (Person) in.readObject();
                in.close();
                System.out.println("对象已反序列化: " + person.getName() + ", " + person.getAge());
            } catch (Exception e) {
                e.printStackTrace();
            }
        } else {
            System.out.println("文件不存在");
        }
    }
}