Php Laravel 8依赖项注入错误：目标类。。。不存在

有人能解释一下这个代码有什么问题吗？我该怎么办

我在app\BusinessLogic\Managers文件夹中有一个CustomerManager.php文件：

---

例如，它的

App

不是

App

。。您在控制器中引用的类

CustomerManager

将是

App\Http\Controllers\CustomerManager

，因为您从未对其进行别名，而不是

App\BusinessLogic\Managers\CustomerManager

哦，我的天哪，谢谢！例如，它的

App

不是

App

。。您在控制器中引用的类

CustomerManager

将是

App\Http\Controllers\CustomerManager

，因为您从未对其进行别名，而不是

App\BusinessLogic\Managers\CustomerManager

哦，我的天哪，谢谢！

<?php

namespace app\BusinessLogic\Managers;

class CustomerManager 
{
    public function putItem()
    {
        // some code
    } 
}

<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Route;

use app\BusinessLogic\Managers;

class RetailController extends Controller
{
    protected $customerManager;

    public function __construct(CustomerManager $customerManager)
    {
        $this->customerManager = $customerManager;
    }
}

Illuminate\Contracts\Container\BindingResolutionException
Target class [app\BusinessLogic\Managers\CustomerManager] does not exist.