java - java中的序列化和外部化

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What is the difference between Serializable and Externalizable in Java?

java中序列化和外部化有什么区别？

Answer 1

基本上，Serializable 之间的区别和 Externalizable实现 Serialized 的类会自动处理对象的序列化，而实现 Externalizable 的类则负责序列化自身，无需默认序列化的帮助程序。

Externalizable 的 API 规范中提供了更多信息。界面，以及 Serializable界面。来自 Externalized 接口(interface)文档:

Only the identity of the class of an Externalizable instance is written in the serialization stream and it is the responsibility of the class to save and restore the contents of its instances. The writeExternal and readExternal methods of the Externalizable interface are implemented by a class to give the class complete control over the format and contents of the stream for an object and its supertypes.

Discover the secrets of the Java Serialization API本文的“创建您自己的协议(protocol):Externalized 接口(interface)”部分对 Externalized 接口(interface)进行了讨论。