[ShivaniX]

What is Generic Servlet and how it is different from Http Servlet?

[subhashini2020]

Generic servlet is the class which implements servelt interface directly.This is not particualr for one protocol.If we want to design our own servelt whcih not particular any protocol we can extend this class.

Httpservlet is the child class of Generic servlet.it is particular to HTTP protcol.If we want to design HTTP based servlet we can extend the Httpservelt class.

[subhashini2020]

and also generic servlet is abstract class in which service method is not implemented,but in Httpservelt all the methods are implemented but again it is declared as abstract.To avoid object creation for HTTPservlet class ,this class declared as abstract.As methods defined in HTTPservlet class is for generation of error information.So object creation for this class will not make sense.we can extend this class and override methods for generating our required o/p in ourservlet class.

[Sean2]

Generic servlet is protocal independent cannot support cookies httpsession and url writing it does not send large data
Http servlet sends large data and its protocol independent support cookies sessions.

HttpServlet is used to handle only http request & response but whereas Generic servlet can be used to handle any type of requests and responses , such as FTP... The other difference which we can fine between both of them is..

A GenericServlet has a service() method aimed to handle requests. HttpServlet extends GenericServlet and adds support for doGet(), doPost(), doHead() methods (HTTP 1.0) plus doPut(), doOptions(), doDelete(), doTrace() methods (HTTP 1.1).
Both these classes are abstract


Generic servlet doesn’t maintain client session where as httpservlet maintains session.

Generic servlet is the servlet which serves all kind of request but http servlet serves only http servlet. So the later one is protocol dependent.


as part of javax.servlet a class Generic servlet is provided.this class implements the servlet interface,in this class service() is declared as abstract and this class contains the code that is not specific to any protocol

as part of javax.servlet.http a class HttpServlet is provided, this class is sub class of GenericServlet.this class implements the servlet interface and service() is not declared as abstract and this class contains the code that is specific to http protocol