数据相关工作类

//根据日期生成唯一日期编号
 private static AtomicLong sequence = new AtomicLong();

    public static String generateNumber() {
        Date date = new Date();
        SimpleDateFormat format = new SimpleDateFormat("yyyyMMddHHmmssSSS");
        String number = format.format(date);
        return number + sequence.getAndIncrement();
    }