Servlet API

We can develop a servlet application using servlet API packages. There are two packages of servlet API javax.servlet and javax.servlet.http, which are contain many classes and interfaces.

javax.servlet package

javax.servlet package contains many interfaces and classes to develop servlet applications irrespective of any protocol. 

Interfaces

1. Servlet
2. ServletConfig
3. ServletContext
4. ServletRequest
5. ServletResponse
6. RequestDispatcher
7. Filter
8. FilterConfig
9. FilterChain
10. SingleThreadModel
11. ServletRequestListener
12. ServletRequestAttributeListener
13. ServletContextListener
14. ServletContextAttributeListener

Classes

1. GenericServlet
2. ServletException
3. UnavailableException
4. ServletInputStream
5. ServletOutputStream
6. ServletRequestWrapper
7. ServletResponseWrapper
8. ServletRequestEvent
9. ServletContextEvent
10. ServletRequestAttributeEvent
11. ServletContextAttributeEvent

javax.servlet.http package

javax.servlet.http package defines many interfaces and classes to develop http request based servlet.

Interfaces

1. HttpServletRequest
2. HttpServletResponse
3. HttpSession
4. HttpSessionContext
5. HttpSessionListener
6. HttpSessionActivationListener
7. HttpSessionAttributeListener
8. HttpSessionBindingListener

Classes

1. Cookie
2. HttpServlet
3. HttpUtils
4. HttpServletRequestWrapper
5. HttpServletResponseWrapper
6. HttpSessionBindingEvent

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