protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		String method = request.getParameter("method");
		System.out.println("method:"+method);
		if(method.equals("add")){
			add(request, response);
		}else if(method.equals("delete")){
			delete(request, response);
		}else if(method.equals("update")){
			update(request, response);
		}else if(method.equals("insert")){
			insert(request, response);
		}else if(method.equals("listall")){
			listall(request, response);
		}else{
			request.setAttribute("message", "Don't do that");
			request.getRequestDispatcher("/message.jsp").forward(request,response);
		}
	}