ReflectionException-中间件类不存在Laravel 5.5

我知道我不是第一个有这样问题的人。我已经阅读了有关Stackoverflow和其他来源的所有现有信息,但这并不能解决我的问题,我总是会得到一个 ReflectionException Class App\Http\Middleware\xxx does not exist .

<?php

namespace App\Http\Middleware\xxx;

use Closure;

class xxx
{

    public function handle($request, Closure $next)
    {

        return $next($request);
    }
}

别开玩笑了,这真是我的课。我已将其重命名为 xxx 避免输入错误。

我所有的路线都会经过 web 和 admin 中间件:

Route::middleware(['web', 'admin'])->group(function() {  

这是我的 /app/Http/Kernel.php :

protected $middlewareGroups = [
    'web' => [
        \App\Http\Middleware\EncryptCookies::class,
        \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
        \Illuminate\Session\Middleware\StartSession::class,
        // \Illuminate\Session\Middleware\AuthenticateSession::class,
        \Illuminate\View\Middleware\ShareErrorsFromSession::class,
        \App\Http\Middleware\VerifyCsrfToken::class,
        \Illuminate\Routing\Middleware\SubstituteBindings::class,
        \App\Http\Middleware\xxx::class,
    ],  

• 文件名为 xxx.php 它的位置是 App\Http\Middleware\ .
• 命名空间正确
• composer dump autoload无法解决此问题

我还试图修改我的作曲家。json:

"autoload": {
    "classmap": [
        "database/seeds",
        "database/factories",
        "App/Http/Middleware/xxx.php"
    ],

导致以下警告:

Warning: Ambiguous class resolution, "App\Http\Middleware\xxx\xxx" was found in both "$baseDir . '/app/Http/Middleware/xxx.php" and "/code/App/Http/Middleware/xxx.php", the first will be used.