JAAS-如何在LoginModule之外检索主题？

Question

I'm using Tomcat 8 and need to obtain the Subject outside of the LoginModule. I've already tried:

Subject subject = Subject.getSubject(AccessController.getContext());

But that just returns null every time. Anyone have any ideas?

Answer 1

我使用了一个可以包含Subject的自定义Principal ，并将JAAS登录模块设置为Principal ，然后使用request.getUserPrincipal()将其返回到Web应用程序内部，将其转换为我的自定义类，然后调用getSubject() 。