JAVA Servlets and Key Methods

Java Servlets and Key Methods to Review

  1. HttpServlet

    • doGet(HttpServletRequest req, HttpServletResponse resp)
    • doPost(HttpServletRequest req, HttpServletResponse resp)
    • doPut(HttpServletRequest req, HttpServletResponse resp)
    • doDelete(HttpServletRequest req, HttpServletResponse resp)
    • doCopy
    • doOptions
    • service(HttpServletRequest req, HttpServletResponse resp)
    • init(ServletConfig config)
    • destroy()

  2. Filter

    • doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
    • init(FilterConfig filterConfig)
    • destroy()

  3. ServletContextListener

    • contextInitialized(ServletContextEvent sce)
    • contextDestroyed(ServletContextEvent sce)

  4. HttpSessionListener

    • sessionCreated(HttpSessionEvent se)
    • sessionDestroyed(HttpSessionEvent se)

  5. HttpServletRequest

    • getParameter(String name)
    • getParameterValues(String name)
    • getHeader(String name)
    • getCookies()
    • getSession()
    • getAttribute(String name)
    • getRequestURI()

  6. HttpServletResponse

    • setContentType(String type)
    • setHeader(String name, String value)
    • addCookie(Cookie cookie)
    • sendRedirect(String location)
    • getWriter()
    • getOutputStream()

  7. HttpSession

    • setAttribute(String name, Object value)
    • getAttribute(String name)
    • removeAttribute(String name)
    • invalidate()
    • setMaxInactiveInterval(int interval)

  8. ServletContext

    • getAttribute(String name)
    • setAttribute(String name, Object object)
    • getInitParameter(String name)
    • getRealPath(String path)

  9. Custom Authentication Servlets

    • login(String username, String password)
    • logout()
    • isUserInRole(String role)

  10. File Upload Handling

    • getPart(String name) (in HttpServletRequest)
    • write(String fileName) (in Part interface)

  11. WebSocket

    • @OnOpen
    • @OnMessage
    • @OnClose
    • @OnError

  12. Spring Framework Controllers

    • Methods annotated with @RequestMapping, @GetMapping, @PostMapping, etc.
    • @InitBinder methods
    • @ModelAttribute methods