3.HttpJspPage Interface

This interface defines only one method :

1.    jspService( )

Syntax:

public abstract void _jspService(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response) throws javax.servlet.ServletException,java.io.IOException

1.    This method will be executed for each client request.

2.     Web container always calls service () method available in HttpJspBase class which intern calls _jspService() .

3.     We can’t override service () method in our jsp, because it is declared as final in HtpJspBase class.

4.     Web container will always generate _jspService() in the generated servlet at the time of translation page.

5.     If we are placing _jspService() method explicitly in jsp then generated servlet class contains two _jspService() methods which causes compile time error and a  java class never allow to contain more than one method an same signature. Hence we can’t over ride _ JspService()  method explicitly in the jsp.

Note:The following three methods are considered as life cycle methods of the jsp.

1.    jspInit()

2.     jspDestroy()

3.      _jspService()            

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