This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
Hi, Servlet Filter is used to intercept every incoming request before invokes resources and every outgoing response to client. So an advantage of this process is we can do authorization process whether that client have permission to access the resource.