/**
  * Store a newly created resource in storage.
  *
  * @param  Request  $request
  * @return Response
  */
 public function store(Request $request)
 {
     $this->validate($request, ['classname' => 'required']);
     $articleclass = new ArticleClass();
     $articleclass->classname = Input::get('classname');
     if ($articleclass->save()) {
         return Redirect::to('admin');
     } else {
         return Redirect::back()->withInput()->withErrors('保存失败!');
     }
 }