Java ClassLoader - 将动态加载的 jars 添加到系统类加载器
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Java ClassLoader - Adding dynamically loaded jars to the system class loader
提问by Fozefy
Is there any way to update the system class loader at runtime? After I've dynamically loaded a jar file, is there anything I can do to add the classes/packages loaded from this jar into my system class loader?
有没有办法在运行时更新系统类加载器？在我动态加载了一个 jar 文件之后，我可以做些什么来将从这个 jar 加载的类/包添加到我的系统类加载器中？
The reason I'm trying to do this is that while I've had some success through just passing around my newly created ClassLoader in my own code, I'm having trouble with a third party library (apache-WSIF) that doesn't seem to be working with the passed in ClassLoader.
我尝试这样做的原因是，虽然我通过在我自己的代码中传递我新创建的 ClassLoader 取得了一些成功，但我在使用第三方库 (apache-WSIF) 时遇到了麻烦似乎正在处理传入的 ClassLoader。
回答by Fozefy
I've been able to achieve what I was attempting to do using the following:
我已经能够使用以下方法实现我试图做的事情：
Thread.currentThread().setContextClassLoader(myClassLoader);
Thread.currentThread().setContextClassLoader(myClassLoader);
As discussed in the top answer here: How do you change the CLASSPATH within Java?
正如这里的最佳答案中所讨论的：如何在 Java 中更改 CLASSPATH？
Basically, before calling into the WSIF library all I need to do is make sure I've set my custom classLoader as the contextClassLoader on the current thread.
基本上，在调用 WSIF 库之前，我需要做的就是确保我已将自定义 classLoader 设置为当前线程上的 contextClassLoader。
