code: public boolean add(double score, String value){
          try {   
          	boolean result = getJedisCommands(groupName).zadd(key, score, value) >= 1;
          	//设置超时时间
          	if(result)setExpireIfNot(expireTime);
  			return result;
      	} finally{
  			getJedisProvider(groupName).release();
  		}
  	}
docs: 新增元素
  @param score 权重
  @param value  元素
  @return