public class GetClients extends HttpServlet {

    private OperatorService operatorService;


        @Override
        protected void doGet(HttpServletRequest req, HttpServletResponse resp)
                throws ServletException, IOException {
            req.getParameter("clients");
            List <ClientPO> clients = operatorService.getClients();
            req.setAttribute("clients", clients);
            RequestDispatcher dispatcher = getServletContext().getRequestDispatcher("getClients.jsp");
            dispatcher.forward(req, resp);