The JSP pages follows below phases:
Translation of JSP Page
In this phase JSP file converted into Servlet(.java file)
Compilation of JSP Page
In this phase .java file converted into .class
Servlet container create the instance of servlet.
Container invoke jspInit() method
This method is called only once in JSP life cycle.
_jspService() method is invoked by the container
This method is called for every request.
Container invoke jspDestroy() method