Java Server Pages from scratch

Developing Controllers Using Servlets and JSPs

The controller performs the routing of requests to the view after extracting the requests, setting parameters on one or more command beans, and setting the result from the command beans as a request parameter accessible to the presentation layer.

There are two options for implementing the controllers to do the operations:

• Using servlets

• Using JSPs with scriptlets

Using Servlets for Implementing the Controller

Servlets, as the name implies, service requests. Servlets are Java classes that implement one of the interfaces defined in the javax.servlet.* or javax.servlet.http.* packages. These servlets are then deployed or loaded into a servlet container. The container invokes method callbacks on ...