A、Your filter class must implement an init method and a destroy method.

B、Your filter class must also implement javax.servlet.FilterChain.

C、When your filter chains to the next filter， it should pass the same arguments it received in its doFiltermethod.

D、The method that your filter invokes on the object it received that implements javax.servlet.FilterChaincan invoke either another filter or a servlet.

E、Your filter class must implement a doFilter method that takes， among other things， anHTTPServletRequest object and an HTTPServletResponse object.