private static String buildIconSavePath(String ext) {
        return StringExtUtils.format("/ext-resources/images/{}/{}.{}",
                DateTimeFormatter.BASIC_ISO_DATE.format(LocalDate.now()),
                StringExtUtils.getUuid(), ext);
    }
saveIcon

@param iconUrl iconUrl
@return String
src/main/java/com/tuituidan/openhub/util/IconUtils.java