fix gen controller error

Author: inhere

app/Http/Controller/DfdfController.php

@@ -0,0 +1,32 @@
+<?php declare(strict_types=1);
+/**
+ * This file is part of Swoft.
+ *
+ * @link https://swoft.org
+ * @document https://swoft.org/docs
+ * @contact group@swoft.org
+ * @license https://github.com/swoft-cloud/swoft/blob/master/LICENSE
+ */
+
+namespace App\Http\Controller;
+
+use Swoft\Http\Server\Annotation\Mapping\Controller;
+use Swoft\Http\Server\Annotation\Mapping\RequestMapping;
+use Swoft\Http\Server\Annotation\Mapping\RequestMethod;
+
+/**
+ * Class DfdfController
+ * @Controller(prefix="string")
+ * @package App\Http\Controller
+ */
+class DfdfController{
+    /**
+     * this is a example action. access uri path: string
+     * @RequestMapping(route="string", method=RequestMethod::GET)
+     * @return array
+     */
+    public function index(): array
+    {
+        return ['item0', 'item1'];
+    }
+}