/**
  * 根据序数得到枚举
  *
  * @param ordinal
  * @return
  */
 public static ChannelType getByOrdinal(Integer ordinal) {
   if (null != ordinal) {
     for (ChannelType t : ChannelType.values()) {
       if (t.ordinal() == ordinal) {
         return t;
       }
     }
   }
   return null;
 }