Answer / arun sharma

HttpServlet is Http Protocol Specific whereas Generic
servlet is protocol independent and as we know that on
world wide web only http protocol exists thats why most of
the servlets are developed using HttpServlet class. but id
we want proocol independent servlet in that case we develop
servlet using GenericServlet class.

Answer / prakash

Generic servlet is a abstract class which is not
implementing service() method,to serve the client requests
service method has to execute. and also generic servlet is
containing all general statements,and methods which are
changing by protocol wise.

But HttpServlet is a Http protocol specific class,it is also
one abstract class,eventhough all methods got implemented it
is qualified as abstract class to restrict the creation of
objects. Httpservlt class is implementing service() method
to serve the client requests.
so we are using HttpServlet in realtime projects.

why business logic written using servlets not in jsp. Jsp used for presentation purpose. serlvet used for coding business logic and controller logic. Reason for using servlets in business logic.

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