/**
  * 创建URL
  */
 protected function createUrl($a, $c, $params = array())
 {
     // 将参数合并传给请求类生成URL
     $params['c'] = $c;
     $params['a'] = $a;
     return CRequest::createUrl($params);
 }
 /**
  * 定向
  */
 public function redirect($params, $code = 301)
 {
     $url = CRequest::createUrl($params);
     $this->setHttpCode($code);
     header("Location:" . $url);
 }