Servlet API

Servlet Package:

javax.servlet Package:

Interfaces:

Interface	Description
Servlet:	Having declaration of life cycle methods for a servlet.
ServletConfig:	With this we can get initialization parameters.
ServletContext:	To access information about servlet environment.
ServletRequest:	To read client request data.
ServletResponse:	To write data to a client response.
SingleThreadModel:	To implement single threaded servlet.

Classes:

Class	Description
GenericServlet:	It Implements the Servlet and ServletConfig interfaces.
ServletInputStream:	Input stream class to read requests from a client.
ServletOutputStream:	Output stream class for writing responses to a client.
ServletException:	To handle servlet exception
UnavailableException:	Exception if servlet is not available.

javax.servlet.http Package:

Interfaces:

Interface	Description
HttpServletRequest	To read HTTP request.
HttpServletResponse	It is to write HTTP response.
HttpSession	For reading and writting session data.
HttpSessionBindingListener	Informs an object that it is bound to or unbound from a session.

Classes:

Class	Description
Cookie	To read cookie information from request and write state information to response.
HttpServlet	It is to handle HTTP requests and responses.
HttpSessionEvent	Encapsulates a session-changed event.
HttpSessionBindingEvent	Indicates when a listener is bound to or unbound from a session value, or that a session attribute changed.