Java序列化和反序列化

简介

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序列化是将实例化对象转换成字节数组，反序列化是将字节数组转换成对象。

实例

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前提

使需要序列化的类实现Serializable接口

public class MyMessage implements Serializable

序列化

    ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
    ObjectOutputStream objectOutputStream=new ObjectOutputStream(byteArrayOutputStream);
    objectOutputStream.writeObject(object);
    byte[] buffer=byteArrayOutputStream.toByteArray();
    objectOutputStream.close();
    byteArrayOutputStream.close();

反序列化

    ByteArrayInputStream byteArrayInputStream=new ByteArrayInputStream(buffer);
    ObjectInputStream objectInputStream=new ObjectInputStream(byteArrayInputStream);
    Object object=objectInputStream.readObject();
    objectInputStream.close();
    byteArrayInputStream.close();

测试类源码

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

        MyMessage message=new MyMessage("123","456","Hello",new Date());
        File file=new File("F://temp");
        FileOutputStream outputStream=new FileOutputStream(file);
        ByteArrayOutputStream byteArrayOutputStream=new ByteArrayOutputStream();
        ObjectOutputStream objectOutputStream=new ObjectOutputStream(byteArrayOutputStream);
        objectOutputStream.writeObject(message);
        outputStream.write(byteArrayOutputStream.toByteArray());
        objectOutputStream.close();
        byteArrayOutputStream.close();
        outputStream.close();
        System.out.println("OK!");


        File file2=new File("F://temp");
        FileInputStream inputStream=new FileInputStream(file);
        byte[] buffer = new byte[inputStream.available()];
        inputStream.read(buffer);
        ByteArrayInputStream byteArrayInputStream=new ByteArrayInputStream(buffer);
        ObjectInputStream objectInputStream=new ObjectInputStream(byteArrayInputStream);
        MyMessage message2=(MyMessage) objectInputStream.readObject();
        System.out.println(message2.toString());
        objectInputStream.close();
        byteArrayInputStream.close();
        inputStream.close();
    }
}

测试结果为：
OK!
MyMessage [fromIp=123, toIp=456, text=Hello, image=null, date=Wed Sep 30 15:34:45 CST 2015]