Redis实现生成自增流水号

    @Override     public String generate(String bizCode) {         //** 获取今天的日期:yyyyMMdd *//*         String date = com.i2p.util.DateUtils.getCurentDate();         String key = "serial.number:" + date;         //** 自增 *//*         long sequence = this.incr(key);         String seq = SequenceUtils.getSequence(sequence);         StringBuilder sb = new StringBuilder();         sb.append(bizCode).append(seq);         String serial = sb.toString();         return serial;     } 

package com.i2p.util;  public class SequenceUtils {      static final int DEFAULT_LENGTH = 4;     public static String getSequence(long seq) {         String str = String.valueOf(seq);         int len = str.length();         if (len >= DEFAULT_LENGTH) {// 取决于业务规模,应该不会到达4             return str;         }         int rest = DEFAULT_LENGTH - len;         StringBuilder sb = new StringBuilder();         for (int i = 0; i < rest; i++) {             sb.append('0');         }         sb.append(str);         return sb.toString();     } }

/**      * 得到系统当前日期      * "yyyyMMdd"      */     public static String getCurentDate() {         SimpleDateFormat tempDate = new SimpleDateFormat("yyyyMMdd");         String datetime = tempDate.format(new java.util.Date());         return datetime;     }

文章来源: Redis实现生成自增流水号