JSP are built by SUN Microsystem servlet technology. JSP tag contain Java code and its file extension is .jsp. The JSP engine parses the .jsp and create a Java servlet source file. Then it compile the source file into a class file,this is done first time only therefore JSP is probably slower when first time it is accessed.After this compiled servlet is executed and is therefore return faster.

• When the user goes to a JSP page web browser makes the request via internet.





• JSP request gets sent to the Web server.





• Web server recognises the .jsp file and passes the JSP file to the JSP Servlet Engine.





• If the JSP file has been called the first time,the JSP file is parsed,otherwise Servlet is instantiated.





• The next step is to generate a special Servlet from the JSP file. All the HTML required is converted to println statements.





• The Servlet source code is compiled into a class.





• The Servlet is instantiated,calling the init and service methods.





• HTML from the Servlet output is sent via the Internet.




• HTML results are displayed on the user's web browser