protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

         　　　　　//1.直接返回html页面

                 response.setContentType("text/html");

                 PrintWriter out = response.getWriter();

                 out.print(this.getClass());

                 out.println("</HTML>");

                 out.flush();

                 out.close();

 }