Access to User ID in Spring

I'm doing some proof-of-concept work with Spring MVC and security. So far I've managed to write a simple web-app which has a secure webpage which requires a user to login and have the correct role before accessing the database and listing some data. I'm using Spring 2.0.8 by the way. What I require is that, after the user has logged on, is to access the user principal object for the current session to pass into my D开发者_开发百科AO layer. I'd like to do this through the standard bean wiring, so it will have to be something determined at runtime. Any pointers to get started ? Cheers Neil

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SecurityContextHolder#getContext() will return a SecurityContext associated with the current user request.

From there, you can call getAuthentication().getPrincipal() to get the data associated with the logged-in user.

There is no need to inject any bean, the static method in SecurityContextHolder will take care of accessing the correct thread-local data.