关于laravel路由配置中@的作用

URL::action('LoginController@index')

Route::controller('login','LoginController');

Route::get('login',['uses'=>'LoginController@getIndex']);
Route::get('login/edit',['uses'=>'LoginController@getEdit']);
Route::post('login/edit',['uses'=>'LoginController@postEdit']);

Route::get('user/login', [
'as' => 'login', 'uses' => 'LoginController@getIndex'
]);
return redirect()->route('login');