/**
  * 通过key增加该zset中value的score的值
  *
  * @param key
  * @param score
  * @param member
  * @return
  */
 public Double zincrby(String key, double score, String member) {
   ShardedJedis jedis = null;
   Double res = null;
   try {
     jedis = pool.getResource();
     res = jedis.zincrby(key, score, member);
   } catch (Exception e) {
     pool.returnBrokenResource(jedis);
     e.printStackTrace();
   } finally {
     returnResource(pool, jedis);
   }
   return res;
 }