Netshel PayPal配置错误

我在 https://packagist.org/packages/netshell/paypal 中进行了所有配置使用PayPal付款但我有这个错误

FatalErrorPaypal 中的 FatalErrorException .php第 15 行：类 找不到"应用程序''Http''控制器''PayPal">

这是代码

<?php
namespace App'Http'Controllers;
use Illuminate'Http'Request;
use PayPal;
use Redirect;
use App'Http'Requests;

class paywithpaypal extends Controller {
    private $_apiContext;
    public function __construct()
    {
        $this->_apiContext = PayPal::ApiContext(
            config('services.paypal.client_id'),
            config('services.paypal.secret'));
        $this->_apiContext->setConfig(array(
            'mode' => 'sandbox',
            'service.EndPoint' => 'https://api.sandbox.paypal.com',
            'http.ConnectionTimeOut' => 30,
            'log.LogEnabled' => true,
            'log.FileName' => storage_path('logs/paypal.log'),
            'log.LogLevel' => 'FINE'
        ));
    }
    public function getCheckout() {
    $payer = PayPal::Payer();
    $payer->setPaymentMethod('paypal');
    $amount = PayPal:: Amount();
    $amount->setCurrency('EUR');
    $amount->setTotal(42); // This is the simple way,
    // you can alternatively describe everything in the order separately;
    // Reference the PayPal PHP REST SDK for details.
    $transaction = PayPal::Transaction();
    $transaction->setAmount($amount);
    $transaction->setDescription('What are you selling?');
    $redirectUrls = PayPal:: RedirectUrls();
    $redirectUrls->setReturnUrl(action('paywithpaypal@getDone'));
    $redirectUrls->setCancelUrl(action('paywithpaypal@getCancel'));
    $payment = PayPal::Payment();
    $payment->setIntent('sale');
    $payment->setPayer($payer);
    $payment->setRedirectUrls($redirectUrls);
    $payment->setTransactions(array($transaction));
    $response = $payment->create($this->_apiContext);
    $redirectUrl = $response->links[1]->href;
    return Redirect::to( $redirectUrl ); }
public function getDone(Request $request) {
    $id = $request->get('paymentId');
    $token = $request->get('token');
    $payer_id = $request->get('PayerID');
    $payment = PayPal::getById($id, $this->_apiContext);
    $paymentExecution = PayPal::PaymentExecution();
    $paymentExecution->setPayerId($payer_id);
    $executePayment = $payment->execute($paymentExecution, $this->_apiContext);
    // Clear the shopping cart, write to database, send notifications, etc.
    // Thank the user for the purchase
    return view('checkout.done'); }
public function getCancel() {
    // Curse and humiliate the user for cancelling this most sacred payment (yours)
    return view('checkout.cancel'); } }