Java（31）：序列化和反序列化

package zzz;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class SerializationTest {

    public static void main(String[] args) throws IOException, ClassNotFoundException {

        Student stu = new Student("zzz", "123456", 18);

// 序列化：把对象信息写入到本地文件里
// 1.File对象打开本地文件
        File file = new File("f:\object.ser");
// 2.建立数据通道
        FileOutputStream fos = new FileOutputStream(file);
// 3.创建输出流对象：把对象转成字节数据的输出到文件中保存
// 构造方法中传递字节输出流
        ObjectOutputStream ops = new ObjectOutputStream(fos);
// 4.对象写入到硬盘上
        ops.writeObject(stu);
// 5.释放资源
        ops.close();

        System.out.println(stu);

// 反序列化
        FileInputStream fis = new FileInputStream(file);
        ObjectInputStream ois = new ObjectInputStream(fis);
        Student student = (Student) ois.readObject();
        System.out.println(student);
        System.out.println(student.getUserName() + ", " + student.getPassWord() + ", " + student.getAge());
    }

}

class Student implements Serializable {
    public static final long UID = 123L;

    private String userName;
    private String passWord;
    private int age;

    public Student(String userName, String passWord, int age) {
        this.userName = userName;
        this.passWord = passWord;
        this.age = age;
        System.out.println("Student end.");
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public String getUserName() {
        return this.userName;
    }

    public void setPassWord(String passWord) {
        this.passWord = passWord;
    }

    public String getPassWord() {
        return this.passWord;
    }

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

    public int getAge() {
        return this.age;
    }

    @Override
    public String toString() {
        return "Student: userName=" + userName + ", passWord=" + passWord + ", age=" + age;
    }

}