序列化中readObject / writeObject的使用 [英] Uses of readObject/writeObject in Serialization

问题描述

我正在浏览这篇文章以了解更多信息关于Java序列化过程。当使用 readObject / writeObject 时，我可以看到两个用例：

I was going through this article to understand more about Java Serialization process. When it comes to uses of readObject/writeObject I could see two use cases:

1. 我们可以使用 writeObject 在序列化之前加密字节码。从安全的角度来看，这是件好事。


2. 我们可以使用 readObject 来执行需要执行的任何特定代码段在反序列化之后立即从＃1开始，我们甚至可以使用 readObject 来解密序列化对象时被盗取的字节代码。

1. We can use writeObject to encrypt the byte code before it gets serialized. From the security point of view, that's good thing.
2. we can use readObject to execute any specific piece of code that need to execute immediately after deserialization, and off course from poin#1, we can even use readObject to decrypt the byte code that was excrypted while serializing the object.

在编写自定义readObject / writeObject方法时序列化/反序列化对象时是否还有其它实际情况？或者，如果你能指出我可以看到readObject / writeObject的一些体面和实际用途的任何地方？

Is there any other practical scenario you've come across while serializing/deserializing objects by writing customr readObject/writeObject method? Or If you could point me to any place where I could see some decent and practical uses of readObject/writeObject?

推荐答案

自定义 readObject 方法在对象被反序列化后需要初始化瞬态（非序列化）字段时也很有用。

Custom readObject methods are also useful when you need to initialize transient (non-serialized) fields after the object has been deserialized.

BTW，请查看 Effective Java，Chapter 11 （我不确定第2版中的章节/项目编号是什么。）。这是一篇关于序列化的精彩读物。

BTW, check out Effective Java, Chapter 11 (I'm not sure what the chapter/item number is in the 2nd ed.). It's an excellent read on serialization.

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