Basic Lesson 1- Getting Familiar with your JSP server

If you do not have a JSP capable web-server or application server, the first step is to download one.  There are many such servers available, most of which can be downloaded for free evaluation and/or development.  Some of them are:

Blazix from Desiderata Software (1.5 Megabytes, JSP, Servlets and EJBs)
TomCat from Apache (Approx 6 Megabytes)
WebLogic from BEA Systems (Approx 40 Megabytes, JSP, Servlets and EJBs)
WebSphere from IBM (Approx 100 Megabytes, JSP, Servlets and EJBs)

To take the best advantage of this tutorial, it recommended that all the material should be tried out with a real server.

Basic lesson 11:- Controllers in jsp

Sometimes, some pre-processing needs to be done after the user has submitted a form. The result of this pre-processing decides where the control flow should go next. Such pre-processing code is frequently referred to as a "controller".
JSPs are very highly suited for writing simple controllers. For more complex controller logic, JSPs can easily call Java code in other classes. A sample controller is shown below:


<jsp:useBean id="user" class="user.UserData" scope="session"/>
<jsp:setProperty name="user" property="*"/>