How JSP Processing Done ?

JSP container is responsible for handling request that comes to a JSP page. JSP container handles the request in two phases.

a. Translation Phase

b. Processing phase

Whenever a request comes for a jsp page, Application server handed it over to JSP container. JSP container is responsible for handling the request.

Translation phase

JSP container translates the jsp page into a servlet file by converting all the template data to corresponding println statements and jsp data to corresponding java code. Once the .java file generated, then it compiles and make the '.class' file.

Processing Phase

Executing the .class file is comes under processing phase.

When the request comes first time for this jsp, then translation and processing phases performed. For the subsequent requests only processing phase performed, until there is change in jsp file. Whenever JSP container detects there is a change in jsp file, then it performs translation phase automatically.

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