在 Laravel 5 控制器中找不到类App\Http\Controllers\DB

我在员工管理系统中使用laravel 5查询生成器时遇到问题.这是我的员工管理员

<?php

namespace App\Http\Controllers;

use App\Employee;
use Illuminate\Http\Request;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class EmployeesController extends Controller
{

    public function index()
    {
        // $employees = Employee::all();
        // return view('employees.index', compact('employees'));

        $employees = DB::table('employees')->get();

        return view('employees.index', compact('employees'));
    }

}

当我使用注释掉的代码时，视图工作，我可以看到我的员工列表

$employees = Employee::all();
return view('employees.index', compact('employees'));

我在这里看到了answer，我按照建议做了，但没有运气.我添加了use DB；在名称空间声明之后，还try 了

$employees = \DB::table('employees')->get();

but it throws another error which says Call to a member function count() on a non-object on line 6. I even copied the DB.php file from C:\xampp\htdocs\laravel5project\vendor\laravel\framework\src\Illuminate\Support\Facades to the App folder (C:\xampp\htdocs\laravel5project\app) but still no luck. I've also tried to explicitly give it the namespace

use Illuminate\Support\Facades\DB

这里是风景

@extends('layouts.default')
@section('PageTitle', 'Employee List')
@section('content')

@if ( !$employees->count() )
    There are no Employees!
@else    

<table id="tblEmployee" class="table table-striped table-bordered" cellspacing="0" width="100%">
    <thead>
        <tr>
            <th>Name</th>
        </tr>
    </thead>

    <tbody>
        @foreach( $employees as $employee )
        <tr>             
            <td>{{$employee->Name}}</td>
        </tr>
        @endforeach

    </tbody>
</table>

@endif
@endsection

有什么问题吗？