如何运行symfony项目

我是symfony框架的初学者，我想运行我的函数

创建于BlogController

<?php 
namespace AppBundle'Controller;
use Symfony'Bundle'FrameworkBundle'Controller'Controller;
use Sensio'Bundle'FrameworkExtraBundle'Configuration'Route;
class BlogController extends Controller
{
    /**
     * @Route("/blog")
     */
    public function showAction()
    {
      echo "hello friend";
    }
}
?>

C:'xampp'htdocs'mysymfony'src'AppBundle'Controller

mysymfony是项目名。

my routing.yml

app:
    resource: "@AppBundle/Controller/"
    type:     annotation

点击URL:-

http://localhost/mysymfony/blog

我得到这个错误

Object not found!
The requested URL was not found on this server. If you entered the URL manually please check your spelling and try again.
If you think this is a server error, please contact the webmaster.
Error 404
localhost
Apache/2.4.12 (Win32) OpenSSL/1.0.1l PHP/5.6.8

我不知道URL的结构如何运行博客功能。请解决这个问题