public function getJson()
 {
     $news = cache_remember('p.getJson.news.' . user('major'), function () {
         $news = new \app\models\News();
         return json_encode($news->getNewsList());
     });
     $user = cache_remember('user.get.members.' . user('major'), function () {
         $user = new \app\models\User();
         return json_encode($user->getMembers(true));
     });
     $gbnews = cache_remember('home.gbnews', function () {
         $gbnews = new \app\models\GbNews();
         return json_encode($gbnews->lists(6));
     });
     echo '{ "news":' . $news . ', "users":' . $user . ', "gbnews":' . $gbnews . ' }';
 }