code: private int parseAlias(String value) throws CronException {
  		for (int i = 0; i < ALIASES.length; i++) {
  			if (ALIASES[i].equalsIgnoreCase(value)) {
  				return i + 1;
  			}
  		}
  		throw new CronException("Invalid month alias: {}", value);
  	}
docs: 解析别名
  @param value 别名值
  @return 月份int值
  @throws CronException