Question

Sometimes, I find some class names including Aware such as ApplicationContextAware and MessageSourceAware (spring). Does this Aware have any special meanings or is it a famous rule?

Answer 1

Those are not classes, are interfaces. The name is just a convention on Spring meaning that some special framework object is going to be injected to that class if it is managed by the framework.

Directly from the docs of ApplicationContextAware:

Interface to be implemented by any object that wishes to be notified of the ApplicationContext that it runs in.

In this case, the bean that implements this interface will get a reference to the ApplicationContext managing the application.