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Question: Explain Servlet and JSP life cycle

Answer: Servlet Lifecycle:
init() ->this initalizes the servlets initialization information with the configuration parameters.

service : here the business logic starts. that is, all the request and response services goes here.

destroy() : once the process is completed, it will be used to destory all vairables and objects used by servlets.

JSP lifecycle is somewhat diff that servlet life cycle. It includes four steps for the same.
jspInit:works like servlet init method.
jspTransleted: used to translate the JSP into servlet and in case of Tomcat server,thats translated servlets goes in work directory.
_jspService: Its works like servlet's service method.
jspDestory: same as servlets destory method.



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Question: Explain Servlet and JSP life cycle


Answer:

Servlet Lifecycle:
init() ->this initalizes the servlets initialization information with the configuration parameters.

service : here the business logic starts. that is, all the request and response services goes here.

destroy() : once the process is completed, it will be used to destory all vairables and objects used by servlets.

JSP lifecycle is somewhat diff that servlet life cycle. It includes four steps for the same.
jspInit:works like servlet init method.
jspTransleted: used to translate the JSP into servlet and in case of Tomcat server,thats translated servlets goes in work directory.
_jspService: Its works like servlet's service method.
jspDestory: same as servlets destory method.

Source: CoolInterview.com


Life Cycle of JSP

1) init()
2) service()
3) destroy()

Source: CoolInterview.com

Answered by: Ghanshyam | Date: 11/15/2007 | Contact Ghanshyam Contact Ghanshyam

Life cycle of the SERVLETS:-

1)the class is loaded.
2)the constructor is called(create object of that class),
3)container then calls the init() method that creates the servletconfig and servletcontext objects used for accessing the init parameter within the web app.
4)container calls the service() method by creating the thread for each new request.
5)after the service() method the container calls the destroy() method.

Life cycle of the JSP:-
1)create a file with .jsp extension....that file is then translated into.java file.
2)that file is then compiled thereby creating the .class file
3)that class is loaded.
4)then jspinit() method is called.
5)then container calls the jspservice() method
6)finally jspdestroy() method is called.




Source: CoolInterview.com

Answered by: Manish Sahni | Date: 11/8/2009 | Contact Manish Sahni Contact Manish Sahni

Servlet Lifecycle:
init() ->this initalizes the servlets initialization information with the configuration parameters.

service : here the business logic starts. that is, all the request and response services goes here.

destroy() : once the process is completed, it will be used to destory all vairables and objects used by servlets.

JSP lifecycle is somewhat diff that servlet life cycle. It includes four steps for the same.
jspInit:works like servlet init method.
jspTransleted: used to translate the JSP into servlet and in case of Tomcat server,thats translated servlets goes in work directory.
_jspService: Its works like servlet's service method.
jspDestory: same as servlets destory method.


Life Cycle of JSP

1) init()
2) service()
3) destroy()

Source: CoolInterview.com

Answered by: dhiraj kumar srivastava | Date: 2/10/2010 | Contact dhiraj kumar srivastava Contact dhiraj kumar srivastava

<1> load the class
class.forName("servlet");
<2> run the default constructor by cantainer
<3> create the Servlet Config
<4> call the init()method and pass the reference of ServletConfig as parameter
<5> create the ServletRequest and Servlet Response
<6> class service()method ans pass the reference of request and respone as parameter
<7> if again request for same page then go step 5
<8> call destroy()method Source: CoolInterview.com

Answered by: Sumer Singh | Date: 2/16/2010 | Contact Sumer Singh Contact Sumer Singh

Servlet Lifecycle
first the url is collected from the user generates an http request, this request is mapped with the appropriate servlet and loaded in the address space of the server. once the servlet is loaded the following 3 phases starts
1. init():
2.service()
3 destroys()

Jsp Life cycle
JSP engine does the following 7 phases.
Page translation: -page is parsed, and a java file which is a servlet is created.
Page compilation: page is compiled into a class file
Page loading : This class file is loaded.
Create an instance :- Instance of servlet is created
jspInit() method is called
_jspService is called to handle service calls
_jspDestroy is called to destroy it when the servlet is not required. Source: CoolInterview.com

Answered by: uma | Date: 5/10/2010 | Contact uma Contact uma


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