序列化流与反序列化流

Posted 2022-07-20 zhai1997

序列化：将对相中的数据写入到文件。

反序列化：将对象的数据从文件中读取出来。

要实现序列化或反序列化必须实现接口Serializable 。

1、序列化

package pers.zxc.xulie;

import java.io.Serializable;

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

    public String getName() 
        return name;
    

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

    public int getAge() 
        return age;
    

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

    public String toString() 
        return "Person [name=" + name + ", age=" + age + "]";
    

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

package pers.zxc.xulie;

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

public class Test 
    public static void main(String[] args) throws IOException 
        FileOutputStream fos = new FileOutputStream("E:\\\\IO流\\\\java\\\\2221.txt");

        ObjectOutputStream oos = new ObjectOutputStream(fos);
    
        oos.writeObject(new Person("Tom", 12));

        oos.close();

    

运行结果不能看懂，但是可以通过反序列化将数据读出来。

2、反序列化

package pers.zxc.xulie;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;

public class ReadDemo 
    public static void main(String[] args) throws IOException,
            ClassNotFoundException 
        FileInputStream fis = new FileInputStream("E:\\\\IO流\\\\java\\\\2221.txt");
        ObjectInputStream ois = new ObjectInputStream(fis);
        Person obj = (Person) ois.readObject();
        System.out.println(obj.toString());

    

将序列化的结果读了出来。

3、瞬态关键字transient

被transient关键字修饰后，属性就不会被序列化。同时，被静态修饰符修饰后的属性也不会被序列化。

package pers.zxc.xulie;

import java.io.Serializable;

public class Person implements Serializable
    private String name;
    private transient int age;

    public String getName() 
        return name;
    

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

    public int getAge() 
        return age;
    

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

    public String toString() 
        return "Person [name=" + name + ", age=" + age + "]";
    

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