private static final Logger logger = LoggerFactory.getLogger(FtpClient.class);

    public static final String FTP_FILE_GROUP = "ftpFileGroup";

    public static final String FTP_FILE_USER = "ftpFileUser";

    public static final String FTP_AUTHENTICATIONS_PROPERTY = "ftpAuthentications";

    protected String charset = Constants.UTF_8;

    @Resource
    protected ContentLengthHelper contentLengthHelper;