增加Magento后台管理功能二：开发后台Controller

在模块的controllers目录下创建Adminhtml目录，新建一个Controller类。 

class Glamour_CustomerMessage_Adminhtml_MessageController extends Mage_Adminhtml_Controller_Action
{
      //设置当前激活的菜单
      protected function _initAction(){
       $this->loadLayout()
    ->_setActiveMenu('customer/message')
    ->_addBreadcrumb(Mage::helper('adminhtml')->__('Customer Message'), Mage::helper('adminhtml')->__('Customer Message'));
       return $this;
     }
}

后台的Controller类继承自Mage_Adminhtml_Controller_Action（前台Controller继承的类是Mage_Core_Controller_Front_Action）。 

在etc/config.xml加入： 

<admin>
         <routers>
            <adminhtml>
                <args>
                    <modules>
                        <customermessage before="Mage_Adminhtml">Glamour_CustomerMessage_Adminhtml</customermessage>
                    </modules>
                </args>
            </adminhtml>
        </routers>
    </admin>

这样就可以使用和Magento自带的后台模块类似的url .../index.php/admin/message/来访问自定义模块的后台controller，也可以实现rewrite后台controller。