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

问题描述

我正在阅读这篇文章以了解更多信息关于 Java 序列化过程.当谈到 readObject/writeObject 的使用时，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 在字节码被序列化之前对其进行加密.从安全的角度来看，这是一件好事.
2. 我们可以使用 readObject 来执行任何需要在反序列化后立即执行的特定代码段，当然，从 poin#1 开始，我们甚至可以使用 readObject解密在序列化对象时解密的字节码.

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.

在通过编写自定义 readObject/writeObject 方法序列化/反序列化对象时，您是否遇到过其他任何实际场景?或者，如果您能指出我可以看到 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 方法在您需要在对象反序列化后初始化瞬态(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.

顺便说一句，看看 Effective Java，第 11 章(我不确定第二版中的章节/项目编号是什么.).这是一本关于序列化的优秀读物.

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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