Pure Java Server Pages™

The Superclass

The requirements for your superclass are as follows:

• It must implement the HttpJspPage, if it uses the HTTP protocol, or JspPage, if it does not.

• All methods from the Servlet interface must be declared final.

• The service() method must invoke the _jspService() method.

• The init() method must invoke the jspInit() method.

• The destroy() method must invoke the jspDestroy() method.

A sample superclass servlet, which provides two utility methods for getting the username and company name, can be found in Listing 8.1.

Code Listing 8.1. PureJSPBase.java

import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.jsp.HttpJspPage; import java.io.*; import java.util.*; public abstract class PureJSPBase extends HttpServlet implements ...