06/02/25
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Q)Explain about servicing phase of a servlet.
  =>Servlet Container(Engine) calling service method on the servlet object
  is nothing but servicing phase of the servlet.
  =>Servlet Container creates ServletRequest and ServleResponse objects
  and by supplying these two objects(references) as arguments, Servlet Container
  calls the service method of the servlet. Once service method is completely
  executed, one client's request-response cycle is complete.
  =>If concurrent mulitple requests come for the servlet, Container creates a thread
  per client and implements servicing phase.

  DIAGRAMS

Q)What are the system requirements to develop and run a Java web application?
=>Java Web Container software.
           For eg.  Tomcat 

DIAGRAM


Q)What are the steps involved in Java web application development?

Step 1:- create a structured hierarchy of directories

                          root folder
			         WEB-INF
				       classes
				       lib
				       src
=>"src" folder is meant for Java source files
=>"classes" folder is meant for Java class files
=>"lib" folder is meant for all jar files

Step 2:- develop all the files of the application.
               1)static resources(htmls,css files,image files etc.)
	       2)dynamic resources (servlets & jsps)


Step 3:- develop the deployment descriptor(web.xml)


Step 4:- configure the application files
               =>All html files,java script files,css files, image files,jsps are 
	       to be placed into root folder
	       =>place web.xml in WEB-INF folder
	       =>All ".class" files place in "classes" folder
               =>jar files if any place them in "lib" folder