类应用程序存储库不存在

我正在尝试使用存储库，但收到此错误：

Class App'Repositories'CategoryRepository does not exist

这是我的类别存储库.php

<?php
namespace App'Repositories;

    class SubCate
    {
        /**
         * Get all of the tasks for a given user.
         *
         * @param  User  $user
         * @return Collection
         */
            public function getCategories(){
                $categories='App'category::where('parent_id',0)->get();//united
                $categories=$this->addRelation($categories);
                return $categories;
            }
    }
    ?>

这是我的控制器：

<?php
namespace App'Http'Controllers;
use Illuminate'Http'Request;
use App'Http'Requests;
use App'Http'Controllers'Controller;
use DB;
use App'Product;
use App'Category;
use App'Repositories'CategoryRepository;

class ProductController extends Controller
{
    //
    public function __construct(CategoryRepository $categoryRepository)
    {
        $this->categoryRepository = $categoryRepository;
    }
    public function index(Request $request)
    {
        $subcate = new SubCate;
        try {
            $allSubCategories=$subcate->getCategories();
        } catch (Exception $e) {
            //no parent category found
        }
        return view('welcome', [
            'allSubCategories' => $allSubCategories,
        ]);
    }
}

怎么了？