当我尝试从laravel5.1升级到5.2时，出现以下错误Trait'Illuminate\Foundation\Bus\DispatchesCommands'notfoundinD:\xampp\htdocs\Invoice\web\bootstrap\cache\compiled.php我的Controller类是，namespaceApp\Http\Controllers;useIlluminate\Foundation\Bus\DispatchesCommands;useIlluminate\Routing\ControllerasBaseController;useIllum