code: public static String toUidString(int number) {
          StringBuilder builder = new StringBuilder();
          while (number > 0) {
              builder.append(UID[number % UID_LENGTH]);
              number /= UID_LENGTH;
          }
          return builder.toString();
      }
docs: 数字转uid字符集
  
  @param number 数字集
  
  @return {@link String}
  
  @since 1.0.9