/**
  * 将实体持久化到数据库;
  * @param object $entity
  * @return ini 记录ID;
  */
 public function save($entity)
 {
     $arrayId = array();
     if (is_array($entity)) {
         foreach ($entity as $object) {
             $id = DaoSupport::saveEntity($object);
             array_push($arrayId, $id);
         }
     } else {
         return DaoSupport::saveEntity($entity);
     }
     return $arrayId;
 }