servlets

servlets

1. Lifecycle

   • init()
   • service()
     • doGet()
     • doPost()
   • destroy()

2. hierarchy

   • Servlet
     • GenericServlet
       • HTTPServlet
         • MyServlet

3. definition

   • server side
   • access all Java API
   • gets benefit of Java
   • embedded HTML inside Java code

4. package

   • javax.servlet
     • example
       • ServletContext
       • GenericServlet
       • ServletRequest
       • ServletResponse
   • javax.servlet.http
     • example
       • HTTPServletRequest
       • HTTPServletResponse