Spmjrzl

I have the problem that i always get the error 404 not found, if I want to get the url of my controller. This is my filestructure:

And this is the URL I am trying to get loaded: http://localhost/shoppingcart/index/index (edit) also tried: http://localhost/post/index/index

If this URL does not work, which URL should work for my controller?

My base URL is localhost

Whis is my controller:

<?php
namespace MassiveArt\\ShoppingCart\\Controller\\Index;
use Magento\\Framework\\App\\Action\\Action;
use Magento\\Framework\\App\\Action\\Context;
use Magento\\Framework\\Data\\Form\\FormKey;
use Magento\\Framework\\Controller\\Result\\JsonFactory;
use Magento\\Checkout\\Model\\Cart;
use Magento\\Catalog\\Model\\Product;
class Post extends Action
{
    protected $formKey;
    protected $cart;
    protected $product;
    public function __construct(
       Context $context,
         JsonFactory $resultJsonFactory,
       FormKey $formKey,
       Cart $cart,
       Product $product) {
            $this->formKey = $formKey;
               $this->resultJsonFactory = $resultJsonFactory;
            $this->cart = $cart;
            $this->product = $product;
            parent::__construct($context);
    }
    public function execute()
    {
         $result = $this->resultJsonFactory->create();
       $productId = $this->getRequest()->getParam('productId');
       try {
               $params = array(
                    'form_key' => $this->formKey->getFormKey(),
                    'product' => $productId,
                    'qty'   => 1
            );
              $product = $this->product->load($productId);
              $this->cart->addProduct($product, $params);
              $this->cart->save();
                $result->setData(['message' => __("Product is added in cart")]);
            return $result;
       } catch(\\Exception $e) {
               $result->setData(['error' => __($e->getMessage())]);
               return $result;
         }
 }
}

This is my routes.xml:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/etc/routes.xsd">
   <!--define id for frontend route is “standard”-->
   <router id="standard">
       <!--Route name-->
       <route id="post" frontName="post">
           <!--Module name-->
           <module name="MassiveArt_ShoppingCart" />
       </route>
   </router>
</config>