Servlet Interfaces and Classes

• A Servlet is a class that implements the javax.servlet.Servlet interface.
• javax.servlet.GenericServlet is an abstract implementation of the Servlet interface.
  • Generic, protocol-independent
  • To write, need only override the abstract service method.
• javax.servlet.http.HttpServlet is an abstract extension of GenericServlet.
  • To create an HTTP Servlet suitable for a Web site (most common).
  • To write, usually override the abstract doGet or doPost method, or both.