Guard g;

    public Connection dajSpojenie(HttpServletRequest request) {
        try {
            HttpSession session = request.getSession();
            if(session.getAttribute("spojenie")==null){
                Class.forName("com.mysql.jdbc.Driver");
                Connection c = DriverManager.getConnection("jdbc:mysql://localhost/shop", "root", "");
                g = new Guard(c);


                return c;
            }else{
                return (Connection)session.getAttribute("spojenie");
            }
        }catch(Exception e){
            return null;
        }
    }