Laravel 类App\Http\Requests\TestRequest不存在？但我在控制器中使用这个类

我在控制器中使用相同的App\Http\Requests\TestRequest，但它的显示消息this Class not exit可能有什么问题？能帮我吗

namespace App\Http\Controllers;

use Illuminate\Http\Request;

use App\Http\Requests\TestRequest;

use App\Student;

class InsertController extends Controller
{
    public function insert(TestRequest $request){
        $obj = new Student();
        $obj->Name =$request->name;
        $obj->City = $request->city;
        $obj->save();

        return view('submit');
    }
}

TestRequest代码在这里

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class TestRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'Name'=>'required'
            'City'=>'required'
        ];
    }
}

---

可能类没有正确加载。您是使用php artisan make:request创建它的吗？如果没有，您可能需要运行
composer dumpautoload
。是的，我使用了php artisan make:request命令…在composer dump autoload命令之后不工作。。