public String getNextBackupFileName() {
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmss");
        String dateStr = format.format(new Date(System.currentTimeMillis()));
        return getFilePath() + "." + dateStr;
    }
get file name

@return file name with prefix
inlong-audit/audit-common/src/main/java/org/apache/inlong/audit/file/ConfigHolder.java