class DataCenterController extends  Controller{

        public function aa(){

            $aa='ZZ';

            return view('index',['aa'=>$aa]);

        }

        public function bb(){

            $bb='QQ';

            return view('index',['bb'=>$bb]);

        }

}

Route::view('index','DataCenterController @aa');

Route::view('index','DataCenterController @bb');