序列化和反序列化

序列化:将对象转换成字节序列,方便对象的存储和传输
反序列化:将字节序列转换成对象的过程

序列化需要实现Serializable这个接口,或者子类的父类实现了Serializable接口,
通过ObjectOutputStream对象输出流将java对象持久化到磁盘上,
通过ObjectIntputStream对象输入流将磁盘中的字节码文件转换成java对象

public class SerializableDemo implements Serializable {
    //serialVersionUID: 保证版本一致,修改了这个类,就要修改这个值,否则可能会报错
    private static final Long serialVersionUID = 1L;
    private static String AGE = "269";
    private String name;
    private String color;
    transient private String car;

    @Override
    public String toString() {
        return "SerializableDemo{" +
                "AGE='" + AGE + '\''+
                ", name='" + name + '\'' +
                ", color='" + color + '\'' +
                ", car='" + car + '\'' +
                '}';
    }

import java.io.*;

public class SerializableTest01 {
    public static void main(String[] args) throws Exception {
        oosTest();
        SerializableDemo sd = oisTest();
        System.out.println(sd.toString());
    }

    private static SerializableDemo oisTest() throws Exception{
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("d:/hello.txt")));
        SerializableDemo o = (SerializableDemo)ois.readObject();
        System.out.println("完成反序列化");
        ois.close();
        return o;
    }

    public static void oosTest() throws IOException{
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("d:/hello.txt")));
        SerializableDemo sd = new SerializableDemo("小明","黄色","奥迪");
        oos.writeObject(sd);
        System.out.println("完成序列化");
        oos.close();
    }
}