生成随机流水号工具类

package com.cmos.ngoccore.util;

import java.util.Date;
import java.util.Random;

import org.apache.commons.lang.time.DateFormatUtils;
import org.springframework.util.StringUtils;

import com.cmos.cache.redis.JedisClusterFactory;
import com.cmos.core.logger.Logger;
import com.cmos.core.logger.LoggerFactory;

import redis.clients.jedis.JedisCluster;

public class SequenceUtils {
    private static final Logger LOGGER = LoggerFactory.getUtilLog(SequenceUtils.class);
     /**
    * 鏍规嵁redis閿�鑾峰彇搴忓垪鍞竴鏍囪瘑
    * @param key 缂撳瓨閿�
    * @return 搴忓垪鍞竴鏍囪瘑
    */
    public static String getSequence(String key) throws CustomerException {
        int length=30;
        if (StringUtils.isEmpty(key)) { 
            LOGGER.error("REDIS KEY IS NOT EXIST");
            return null;
        }
        String datePattern="yyyyMMddHHmmssSSS";
        int randomLength=length-datePattern.length();
        String id = null;
        try {
            LOGGER.info("寮�鑾峰彇涓婚敭 "+ "key=" + key);    
            JedisCluster jedisCluster=JedisClusterFactory.getJedisCluster();
            String redisValue=jedisCluster.incr(key).toString();
            id = DateFormatUtils.format(new Date(), datePattern) +redisValue;
            LOGGER.info("鑾峰彇涓婚敭鎴愬姛"+"id=" + id);
        } catch (Exception e) {
            id = DateFormatUtils.format(new Date(), datePattern)+getRandomStringByLength(randomLength);
            LOGGER.error("NOT ERROR! 涓婚敭鑾峰彇鎴愬姛"+"key=" + key + ",id=" + id,e);
        }
        return id;
    }    
    

    /**
    * 鎸囧畾闀垮害锛岄�杩囧綋鍓嶆椂闂�闅忔満鏁拌幏鍙栧敮涓�簭鍒楁爣璇�
    * @param length 鎸囧畾瀛楃涓查暱搴�
    * @return 鍞竴搴忓垪鏍囪瘑
    */
    public static String getSequence(int length) throws CustomerException {
        String datePattern="yyyyMMddHHmmssSSS";
        int randomLength=length-datePattern.length();
        if (randomLength<=0) {
            LOGGER.error("获取流水号失败!");
            return null;
        }    
        String id = DateFormatUtils.format(new Date(), datePattern)+getRandomStringByLength(randomLength);
        return id;
    }

     /**
    * 鑾峰彇涓�畾闀垮害鐨勯殢鏈哄瓧绗︿覆
    * @param length 鎸囧畾瀛楃涓查暱搴�
    * @return 涓�畾闀垮害鐨勫瓧绗︿覆
    */
   public static String getRandomStringByLength(int length) {
       String base = "0123456789";
       Random random = new Random();
       StringBuilder sb = new StringBuilder();
       for (int i = 0; i < length; i++) {
           int number = random.nextInt(base.length());
           sb.append(base.charAt(number));
       }
       return sb.toString();
   }
}