Spring模版接口 ZSetOperations的 Long count(K key, double min, double max)方法

文档地址 https://docs.spring.io/spring-data/redis/docs/current/api/org/springframework/data/redis/core/ZSetOperations.html#count(K,double,double)

count方法

@Nullable
Long count(K key, double min, double max)
计算排序集 中 分数介于最小值和最大值之间的元素数量。
Count number of elements within sorted set with scores between min and max.

Parameters:

• key - must not be null.
• min -
• max -

Returns: null when used in pipeline / transaction.
See Also: Redis Documentation: ZCOUNT https://redis.io/docs/latest/commands/zcount/

Redis中的ZCOUNT

返回键对应的有序集合中，分数介于 min 和 max 之间的元素数量。
Returns the number of elements in the sorted set at key with a score between min and max.

min 和 max 参数的语义与 ZRANGEBYSCORE 中的描述相同。
The min and max arguments have the same semantic as described for ZRANGEBYSCORE.

注意：该命令的复杂度仅为 O(log(N))，因为它使用元素 排序（参见 ZRANK）来了解范围。因此，无需进行与范围大小成比例的工作。
Note: the command has a complexity of just O(log(N)) because it uses elements ranks (see ZRANK) to get an idea of the range. Because of this there is no need to do a work proportional to the size of the range.

代码实例

long count_oneminute = stringRedisTemplate.opsForZSet().count(SENDCODE_SENDTIME_KEY + phone, oneMinuteAgo, System.currentTimeMillis());

统计在键为SENDCODE_SENDTIME_KEY + phone的有序集合中，分数（score）在oneMinuteAgo到当前时间之间的元素数量。