Java基础-对象序列化

对象序列化：

• 作用：以内存为基准，把内存中的对象存储到磁盘文件中去，称为对象序列化。
• 使用到的流是对象字节输出流：ObjectOutputStream

package per.mjn.serializable;

import java.io.Serializable;

/**
 * 对象要序列化，必须实现Serializable序列化接口
 */
public class Student implements Serializable {

    private String name;
    private String loginName;
    private String password;
    private int age;

    @Override
    public String toString() {
        return "Student{" +
                "name='" + name + '\'' +
                ", loginName='" + loginName + '\'' +
                ", password='" + password + '\'' +
                ", age=" + age +
                '}';
    }

    public Student() {
    }

    public Student(String name, String loginName, String password, int age) {
        this.name = name;
        this.loginName = loginName;
        this.password = password;
        this.age = age;
    }

    public String getName() {
        return name;
    }

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

    public String getLoginName() {
        return loginName;
    }

    public void setLoginName(String loginName) {
        this.loginName = loginName;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public int getAge() {
        return age;
    }

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

package per.mjn.serializable;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

/**
 * 对象序列化，使用ObjectOutputStream将内存中的对象存入磁盘文件中
 */
public class ObjectOutputStreamDemo1 {
    public static void main(String[] args) throws IOException {
        // 1. 创建学生对象
        Student s = new Student("mjn", "mjn", "1111", 22);

        // 2. 对象序列化，使用对象字节输出流包装字节输出流管道
        ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream("d:/obj.txt"));

        // 3. 直接调用序列化方法
        objectOutputStream.writeObject(s);

        // 4. 释放资源
        objectOutputStream.close();
        System.out.println("序列化完成");
    }
}