如何在安全上下文中以编程方式验证和创建会话

Hi i have an application that uses its own implementation for user to authenticate ,by saving a User pojo in the HttpSession and invalidating that HttpSession Object when the session is done, but what i want to do is to use the security context to authenticate the user. let's say that i have servlet AuthenticateUserServlet:Hi i have an application that uses its own impl