Generic and HttpServlet

Question

Hi Friends Whats the that the GenericServlet and HttpServlet class implement Serializable interface? What happen if we not do show. Thanks........

Satyapriya Nayak · Answer

Hi Vikas, Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable{mso-style-name:"Table Normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-parent:"";mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin:0in;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:10.0pt;font-family:"Times New Roman";} Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable{mso-style-name:"Table Normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-parent:"";mso-padding-alt:0in 5.4pt 0in 5.4pt;mso-para-margin:0in;mso-para-margin-bottom:.0001pt;mso-pagination:widow-orphan;font-size:10.0pt;font-family:"Times New Roman";} In order to support HTTP session states, all servlet session data must be serializable. Moreover, s ervlets need to communicate over the network to Java objects(e.g. in Applet-Servlet communication),in such scenarios it becomes necessary to enable serialization of objects' states through implementation of Serializable interface.This is the way GenericServlet and HttpServlet classes have been designed by their designers to make them capable of serialization. HttpServlet belongs to javax.servlet.http package. HttpServlet extends GenericServlet . HttpServlet Provides an abstract class to be subclassed to create an HTTP servlet suitable for a Web site. A subclass of HttpServlet must override at least one method, usually one of these: doGet, if the servlet supports HTTP GET requests doPost, for HTTP POST requests doPut, for HTTP PUT requests doDelete, for HTTP DELETE requests GenericServlet defines a generic, protocol-independent servlet. GenericServlet belongs to javax.servlet package . To write a generic servlet, you need only override the abstract service method.GenericServlet implements the Servlet and ServletConfig interfaces. GenericServlet may be directly extended by a servlet, although it?s more common to extend a protocol-specific subclass such as HttpServlet. GenericServlet makes writing servlets easier. It provides simple versions of the lifecycle methods init and destroy and of the methods in the ServletConfig interface. GenericServlet also implements the log method, declared in the ServletContext interface. Thanks

Vikas Mishra · Answer

Thanks.........

Vulpes · Answer

I'm not sure what your question is but the Java documentation for these classes may clear up any doubts that you have: http://docs.oracle.com/javaee/1.3/api/javax/servlet/GenericServlet.html http://docs.oracle.com/javaee/1.3/api/javax/servlet/http/HttpServlet.html