Is it possible to use Spring with the existing authorization

I am new to Spring Framework. I could not find a solution to incorporate the existed authorization and authentication framework to spring framework. myCompanyInfrastructure has Abstract servlet which extends Http servlet and has doGet and doPost methods. We hided these and myCompDoGet and myCompDoPost methods were available to the extended class.
All app servlets must extend this Infrastructure’s absServlet for click to click authorization, authentication and user’s authorized products.

Is it possible to use Spring Framework with the existing myCompanyInfrastructure ‘s authorization and authentication abstract servlet? If yes how? Appreciate your help in-advance.

Re-posted http://forum.springframework.org/showthread.php?t=16342.