什么是Java中的序列化？ [英] What is serialization in Java?

问题描述

可能重复：

什么是对象序列化？

我做了一个小RSS使用Swing和Eclipse的Reader应用程序一直告诉我可序列化类MochaRSSView没有声明类型为long的静态最终serialVersionUID字段

I've made a small RSS Reader app using Swing and Eclipse keeps telling me "The serializable class MochaRSSView does not declare a static final serialVersionUID field of type long"

什么是序列化以及它有什么好处？ ？

What is serialization and what benefits would it have?

推荐答案

Serializable是一个标记接口，它告诉JVM它可以将对象的状态写出到某些流（基本上是读取的）所有成员，并将他们的状态写入流，或磁盘或其他东西）。默认机制是二进制格式。你也可以用它来克隆东西，或者在调用之间保持状态，通过网络发送对象等。

Serializable is a marker interfaces that tells the JVM it can write out the state of the object to some stream (basically read all the members, and write out their state to a stream, or to disk or something). The default mechanism is a binary format. You can also use it to clone things, or keep state between invocations, send objects across the network etc.

你可以让eclipse为你生成一个（基本上只是一个长的）随机但唯一的ID）。这意味着您可以控制何时认为类与序列化版本兼容。

You can let eclipse generate one for you (basically just a long random but unique ID). That means you can control when you think a class would be compatible with a serialized version, or not.

（注意：所有非瞬态成员变量必须是可序列化的类，否则您将收到错误 - 因为JVM将通过结构写出来每个对象的状态，直到将原语写入ObjectOutputStream的水平。）

(Note: that all the non transient member variables must be of a serializable class, or you will get an error - as the JVM will recurse through the structure writing out the state of each object down to the level of writing primitives to the ObjectOutputStream).

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