/**
  * 初始化匿名用户
  */
 protected function _initUser()
 {
     $frontController = $this->bootstrap('frontController')->getResource('frontController');
     if (!$frontController->hasPlugin('ZtChart_Plugin_Auth')) {
         ZtChart_Model_User::setAnonymousRole(ZtChart_Model_Role::ADMIN);
     }
     Zend_Registry::set('user', ZtChart_Model_User::getAnonymous());
 }