缓存清理。在多个类加载器加载后，当前类加载器加载的cache不会被清理，会导致mataSpace增加

[lunasaw]

提供cleanUp方法，业务方可以清理缓存

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[lunasaw]

临时策略，清理几个大类下的map，真正的卸载还需要完整的移除关联引用信息

[DQinYuan]

cleanUp 的入口有点分散啊？你在应用中是打算怎么用，分别调用这么多类的 cleanUp？

看看入口是不是集中一下，或者在更换 classLoader 时做自动清理