洪老您好，我今天調試了一天路由的配置，有幾個問題還是沒有想明白，請洪老解惑。上代碼：

第一個問題：

#app/config/routing.yml中路由配置
custom:
????resource:?@CustomSiteBundle/Controller/
????type:?????annotation

#src/Custom/SiteBundle/Controller/DefaultController.php

namespace?Custom\SiteBundle\Controller;

use?Symfony\Bundle\FrameworkBundle\Controller\Controller;

//?these?import?the?"@Route"?and?"@Template"?annotations
use?Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use?Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;

class?DefaultController?extends?Controller
{
????/**
?????*?@Route("/",?name="_demo")
?????*?@Template()
?????*/
????public?function?indexAction()
????{
????????return?array();
????}
}

此時可以正常訪問該路由：http://localhost/app.php，但是我新建一個Controller：

#src/Custom/SiteBundle/Controller/CommunalController.php

namespace?Site\HomeBundle\Controller;

use?Symfony\Bundle\FrameworkBundle\Controller\Controller;

//?these?import?the?"@Route"?and?"@Template"?annotations
use?Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use?Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;

/**
?*?@Route("/communal")
?*/
class?CommunalController?extends?Controller
{
????/**
?????*?@Route("/navgate")
?????*?@Template()
?????*/
????
????public?function?naygateAction()
????{
????????return?array();
????}
????
????/**
?????*?@Route("/sidebar")
?????*?@Template()
?????*/
????public?function?sideBarAction()
????{
????????return?array();
????}
????
????/**
?????*?@Route("/footer")
?????*?@Template()
?????*/
????public?function?footerAction()
????{
????????return?array();
????}
}

此時訪問/communal下的任何一個方法都報404，http://localhost/app_dev.php/communal

查看官方文檔有：

Including External Routing Resources

All routes are loaded via a single configuration file - usually app/config/routing.yml (see Creating Routes above). However, if you use routing annotations, you'll need to point the router to the controllers with the annotations. This can be done by "importing" directories into the routing configuration:

但不知我這錯在那塊?

還有app/config/routing.yml中custom指的是什么？和@Route("/", name="_demo")中的name是什么關系？

第二個問題：

#修改app/config/routing.yml
custom:
????resource:?"@CustomSiteBundle/Resources/config/routing.yml"

#CustomSiteBundle/Resources/config/routing.yml
custom:
????resource:?@CustomSiteBundle/Controller/
????type:?????annotation

修改后訪問http://localhost/app_dev.php，404

這塊又是為什么，我只是換了位置？

請洪老答疑，我覺得路由這塊洪老一筆帶過，尤其是app/config/routing.yml與其他bundle的routing.yml之間關系講的很簡單，難道也是伏筆？