JAVA 序列化

一、概念

序列化：将对象转换为字节序列的过程。

反序列化：将字节序列恢复为对象的过程。

二、简单示例

package serialization;

import java.io.Serializable;

public class Person implements Serializable {

    /**
     * @Fields serialVersionUID : 自动生成的序列化id
     */

    private static final long serialVersionUID = 903332120406898371L;

    private String name;

    //使用transient修饰，序列化时，将忽略该字段。
    private transient String password;

    public String getName() {
        return name;
    }

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

    public String getPassword() {
        return password;
    }

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

}

Person类（被序列化的对象）

package serialization;

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

public final class SerializePerson {

    public void serPerson() throws IOException {

        Person p = new Person();

        p.setName("Test");
        p.setPassword("password");

        File f = new File(".\\src\\serialization\\Person.out");

        FileOutputStream fo = new FileOutputStream(f);
        ObjectOutputStream oo = new ObjectOutputStream(fo);

        oo.writeObject(p);
        oo.close();

        System.out.println("Person对象序列化成功！");
    }

    @SuppressWarnings("resource")
    public Person deserPerson() throws Exception {

        File f = new File(".\\src\\serialization\\Person.out");

        FileInputStream fis = new FileInputStream(f);
        ObjectInputStream ois = new ObjectInputStream(fis);

        Person person = (Person) ois.readObject();
        System.out.println("Person对象反序列化成功！");
        return person;

    }

}

序列化与反序列化方法

package serialization;

public class Test {

    public static void main(String[] args) throws Exception {

        SerializePerson sp = new SerializePerson();
        sp.serPerson();
        Person p = sp.deserPerson();

        System.out.println("name:" + p.getName() + ", password:"
                + p.getPassword());
    }
}

测试类

使用 transient 修饰字段，序列化时将忽略该字段。