当我们在路由中调用控制器ProductController时，会发现以下问题: "Target class [ProductController] does not exist"
你也可以看到下面的截图。
实际上这不是错误，但是laravel 8从RouteServiceProvider.php文件中删除了默认名称空间。
我们可以在路由文件中指定，也可以在RouteServiceProvider.php文件中定义默认名称空间。让我们一一看这两种解决方案。
解决方案1:在路由文件中使用
routes/web.php
<?php
use Illuminate\Support\Facades\Route;
use App\Http\Controllers\ProductController;
use App\Http\Controllers\PostController;
/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/
Route::get('/'， function () {
return view('welcome');
});
Route::resource('products'， ProductController::class);
Route::get('posts'， [PostController::class， 'index']);解决方案2:在RouteserviceProvider 中定义
第二种解决方案是您可以将laravel定义为旧版本。所以让我们将其定义为:app/Http/Providers/RouteServiceProvider.php
<?php
namespace App\Providers;
use Illuminate\Cache\RateLimiting\Limit;
use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvider;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\RateLimiter;
use Illuminate\Support\Facades\Route;
class RouteServiceProvider extends ServiceProvider
{
/**
* The path to the "home" route for your application.
*
* This is used by Laravel authentication to redirect users after login.
*
* @var string
*/
public const HOME = '/home';
protected $namespace = 'App\Http\Controllers';
/**
* Define your route model bindings， pattern filters， etc.
*
* @return void
*/
public function boot()
{
$this->configureRateLimiting();
$this->routes(function () {
Route::middleware('web')
->namespace($this->namespace)
->group(base_path('routes/web.php'));
Route::prefix('api')
->middleware('api')
->group(base_path('routes/api.php'));
});
}
....routes/web.php
<?php
use Illuminate\Support\Facades\Route;
/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/
Route::get('/'， function () {
return view('welcome');
});
Route::resource('products'， 'ProductController');
Route::get('posts'， 'PostController@index');