Rochal,
From the questions you're asking, it appears that you're missing some of the basic concepts of Struts. Without at least some mastery of these basic concepts, it's nearly impossible to create a Struts application.
My recommendation would be to take a break from your project for a while and spend some time learning the basics of Struts. In my experience, the best way to do this is by doing a tutorial or two that walks you through the process of creating and running a basic Struts application.
This link has a list of some good ones.
Please don't be offended by my suggestion. I'm sure that once you master the basics, you'll soon be coding Struts applications like a pro.