Important tips and clues to remember

The request attribute is of type java.util.ArrayList.

The implicit variable for the HttpServletRequest object is named request, and you can use it within
scriptlets or expressions, but not within directives or declarations. Whatever
you can do with a request object in a servlet, you do inside your JSP.

A JSP’s servlet method can process request parameters, because remember, your code is going to be
inside a servlet’s service method. You don’t have to worry about which of the HTTP methods (GET or POST) was used in the request.