code: public Double zincrby(Object key, double score, Object member) {
  		Jedis jedis = getJedis();
  		try {
  			return jedis.zincrby(keyToBytes(key), score, valueToBytes(member));
  		}
  		finally {close(jedis);}
  	}
docs: 为有序集 key 的成员 member 的 score 值加上增量 increment 。