hello! i m reading servlets these days and i want to read about structs and sessions.please give me links here so that i can read about them and so that i can make some application(web) based on concept of these two. i have searched google and also find many things, but i am not satisfied with that. i know people here know the best one links on the net. please help!! thanks in advance!!

well ... servlets as technology is a bit out of date, doesn't mean it's not worth looking into, if only to get the hang of the MVC pattern.
A good book to consider is Head First JSP & Servlets, and I think that the JSP forum in the Web development part of Daniweb will be a better place to ask your questions about jsp's and servlets.