根据时间生成唯一ID

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根据时间生成唯一ID

publicclass GenerateSequenceUtil {privatestatic final Logger logger = Logger.getLogger("log"); /** The FieldPosition. */privatestatic final FieldPosition HELPER_POSITION = new FieldPosition(0);/**This Format for format the data to special format. */ private final static Format dateFormat = newSimpleDateFormat("YYYYMMddHHmmssS"); /** This Format for format the number tospecial format. */privatefinal static NumberFormat numberFormat = new DecimalFormat("0000");/**This int is the sequence number ,the default value is 0. */ private static int seq = 0; private static final int MAX = 9999; /** * 时间格式生成序列 * @return String */ public static synchronized StringgenerateSequenceNo() { Calendar rightNow = Calendar.getInstance(); StringBuffer sb = new StringBuffer(); dateFormat.format(rightNow.getTime(), sb,HELPER_POSITION); numberFormat.format(seq, sb, HELPER_POSITION); if (seq == MAX) { seq = 0;}else { seq++; }  logger.info("THE SQUENCE IS :" +sb.toString());  return sb.toString(); }}

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