ObjectInputStream自定义类加载器反序列化问题：未调用resolveClass（） [英] ObjectInputStream custom classloader deserialization issue: resolveClass() not called

问题描述

我有一个 ObjectInputStream ，并希望使用自定义的 ClassLoader 加载类。

因此将创建 ObjectInputStream 的子类，该子类将覆盖 resolveClass（）函数。 / p>

现在，我的问题是我想在执行期间更改 ClassLoader 。但是有时候当我在此流上执行 readObject（）时，似乎未执行 resolveClass（）。然后用错误的 ClassLoader 加载类。

任何想法为什么 resolveClass（） 不执行，如何解决此问题？

解决方案

resolveClass（ ）将在流中每个类描述符调用一次。我不知道如果您为相同的完全限定的类名编写了多个描述符（可能未指定）会发生什么。正确的解决方案是使用多个流（可以相互嵌套）。

I have an ObjectInputStream and want to load classes with a custom ClassLoader.

Thus is created a subclass of ObjectInputStream that overrides the resolveClass() function.

Now my problem is that i want to change the ClassLoader during execution. But sometimes resolveClass() does not seem to be executed when I do readObject()on this stream. Then the class is loaded with the wrong ClassLoader.

Any idea why resolveClass() is not executed and how to solve this issue?

解决方案

resolveClass() will be called once per class descriptor in the stream. I have no idea what would happen if you wrote multiple descriptors for the same full qualified class name - probably unspecified. The correct solution would be to use multiple streams (could be nested within one another).

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