public function response(){
//响应json
/*$data = [
'errCode'=>0,
'errMsg' =>'success',
'data' => 'yxh',
];
return response()->json($data);*/
//重定向
//return redirect('Hello');
//return redirect('Hello')->with('message','yxh');
//return redirect()->action('UserController@Hello')->with('message','yxh');
//return redirect()->route('Hello')->with('message','yxh');
//返回上一个页面
//return redirect()->back();
}