Components and Containers

The JavaServer Pages technology builds on the Servlet standard extension. JavaServer Pages 

is a Standard Extension that is defined extending the concepts in the Servlet Standard 

Extension. JSP 1.1 uses the classes from Java Servlet 2.2 specification. 

JSP pages and Servlet classes are collectively referred as 

Web Components

. JSP pages are 

delivered to a 

Container

 that provides the services indicated in the 

JSP Component Contract

.

JSP 1.1 and Servlet 2.2 rely only on features in the Java Runtime Environment 1.1, although 

they are compatible with, and can take advantage of, the Java 2 Runtime Environment.

1.3

Features in JSP 1.1

The JavaServer Pages specification includes:

Standard directives

Standard actions

Script language declarations, scriptlets and expressions

A portable tag extension mechanism.

Most of the integration of JSP pages within the J2EE platform is inherited from the reliance 

on the Servlet 2.2 specification.

1.4

Overview of JSP Page Semantics

This section provides an overview of the semantics of JSP pages

1.4.1

Translating and Executing JSP Pages

A 

JSP page

 is executed in a 

JSP container

, which is installed on a Web server, or on a Web 

enabled application server. The JSP container delivers 

requests

 from a client to a JSP page 

and 

responses

 from the JSP page to the client. The semantic model underlying JSP pages is 

that of a servlet: a JSP page describes how to create a response object from a request object 

for a given protocol, possibly creating and/or using in the process some other objects.

Chapter 1

Overview

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