Java实现对象的序列化和反序列化

Java中对象的序列化和反序列化可以通过实现Serializable接口来实现。下面是一个简单的例子：

import java.io.*;

public class SerializationDemo {
    public static void main(String[] args) {
        // 创建一个Person对象
        Person person = new Person("Tom", 20);

        // 将Person对象序列化到文件中
        try {
            FileOutputStream fileOut = new FileOutputStream("person.ser");
            ObjectOutputStream out = new ObjectOutputStream(fileOut);
            out.writeObject(person);
            out.close();
            fileOut.close();
            System.out.println("Serialized data is saved in person.ser");
        } catch (IOException i) {
            i.printStackTrace();
        }

        // 从文件中反序列化Person对象
        try {
            FileInputStream fileIn = new FileInputStream("person.ser");
            ObjectInputStream in = new ObjectInputStream(fileIn);
            person = (Person) in.readObject();
            in.close();
            fileIn.close();
        } catch (IOException i) {
            i.printStackTrace();
            return;
        } catch (ClassNotFoundException c) {
            System.out.println("Person class not found");
            c.printStackTrace();
            return;
        }

        // 输出反序列化后的Person对象
        System.out.println("Deserialized Person...");
        System.out.println("Name: " + person.getName());
        System.out.println("Age: " + person.getAge());
    }
}

class Person implements Serializable {
    private String name;
    private int age;

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

    public String getName() {
        return name;
    }

    public int getAge() {
        return age;
    }
}

上述代码中，我们首先创建了一个Person对象，然后将其序列化到文件中。接着，我们从文件中反序列化Person对象，并输出其属性值。