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.
Why is the user typing in the path to a JSP?
Struts is a Front Controller, a strategy to separate the responsibility for controlling the application, the business logic of the application and the view of the data (commonly referred to as MVC). Your user is trying to bypass two of those and rush right to the view, where there is nothing to view.