本质还是一个集合,在set的基础上加一个score,成为了一个有序集合
一样的,关于zset的命令都是z开头
zadd key [NX|XX] [CH] [INCR] score member [score member …]
zset add score member
zrem key member
------------------------------------------------------------------------------------------------------------ ##往zet集合中添加member并标识score 127.0.0.1:6379> zadd zset 1 zset1 (integer) 1 ##往zet集合中添加member并标识score 127.0.0.1:6379> zadd zset 2 zset2 (integer) 1 ##往zet集合中添加member并标识score 127.0.0.1:6379> zadd zset 3 zset3 (integer) 1 ------------------------------------------------------------------------------------------------------------ ##使用zrange获取zset范围内的值 127.0.0.1:6379> zrange zset 0 -1 1) "zset1" 2) "zset2" 3) "zset3" ------------------------------------------------------------------------------------------------------------ ##移除zet的member, ##注意这里不能使用score,要移除元素就写元素的要移除的元素 127.0.0.1:6379> zrem zset 1 (integer) 0 ##使用zrange获取zset范围内的值 127.0.0.1:6379> zrange zset 0 -1 1) "zset1" 2) "zset2" 3) "zset3" ##移除zet的member, 127.0.0.1:6379> zrem zset zset1 (integer) 1 ------------------------------------------------------------------------------------------------------------ ##使用zrange获取zset范围内的值 127.0.0.1:6379> zrange zset 0 -1 1) "zset2" 2) "zset3" 127.0.0.1:6379>升序:
zrangebyscore key min max [WITHSCORES] [LIMIT offset count]
降序:
zrevrangebyscore key max min [WITHSCORES] [LIMIT offset count]
查询所有升序方式:
zrange key start stop [WITHSCORES]
查询所有降序方式:
zrevrange ket start stop [WITHSCORES]
基于实际场景演示:
比如现在公司发了工资:所有的工资都存在这个zset中每个人的工资都是不一样的!我们现在要对工资进行排序
##往zset中添加成员并附带score 127.0.0.1:6379> zadd salay 5000 xiaohng (integer) 1 ##往zset中添加成员并附带score 127.0.0.1:6379> zadd salay 6000 zhangsan (integer) 1 ##往zset中添加成员并附带score 127.0.0.1:6379> zadd salay 13500 xiaoming (integer) 1 ------------------------------------------------------------------------------------------------------------ ##升序查询 127.0.0.1:6379> zrange salay 0 -1 withscores 1) "xiaohng" 2) "5000" 3) "zhangsan" 4) "6000" 5) "xiaoming" 6) "13500" ##降序查询 127.0.0.1:6379> zrevrange salay 0 -1 withscores 1) "xiaoming" 2) "13500" 3) "zhangsan" 4) "6000" 5) "xiaohng" 6) "5000" ------------------------------------------------------------------------------------------------------------ ##升序查询zset的相关key,并根据score从小到大排序 127.0.0.1:6379> zrangebyscore salay -inf inf 1) "xiaohng" 2) "zhangsan" 3) "xiaoming" ##升序查询zset的相关key,并根据score从小到大排序, ##并附带scores的相关属性输出 127.0.0.1:6379> zrangebyscore salay -inf inf withscores 1) "xiaohng" 2) "5000" 3) "zhangsan" 4) "6000" 5) "xiaoming" 6) "13500" ##升序查询##查询zset的相关key,并根据score从小到7000排序, ##并附带scores的相关属性输出 127.0.0.1:6379> zrangebyscore salay -inf 7000 withscores 1) "xiaohng" 2) "5000" 3) "zhangsan" 4) "6000" ------------------------------------------------------------------------------------------------------------ ##降序查询zet 127.0.0.1:6379> zrevrange salay 0 -1 withscores 1) "xiaoming" 2) "13500" 3) "zhangsan" 4) "6000" 5) "xiaohng" 6) "5000" ##降序查询zet 127.0.0.1:6379> zrevrangebyscore salay +inf -inf withscores 1) "xiaoming" 2) "13500" 3) "zhangsan" 4) "6000" 5) "xiaohng" 6) "5000" ------------------------------------------------------------------------------------------------------------我们之前怎么查询set元素的现在往前面加一个z就行
zcard key 查询元素数量
zcount key min max 获取区间值
##查询元素数量 127.0.0.1:6379> zcard salay (integer) 4 ------------------------------------------------------------------------------------------------------------ ##获取范围内的元素 127.0.0.1:6379> zrange salay 0 -1 withscores 1) "wangw" 2) "4" 3) "xiaohng" 4) "5000" 5) "zhangsan" 6) "6000" 7) "xiaoming" 8) "13500" ------------------------------------------------------------------------------------------------------------ ##查询单位内的元素数量 127.0.0.1:6379> zcount salay 4 6000 (integer) 3具体命令也可通过查询官网得知 传送门
BIBiLiLi的排行榜,每日更新等等
后面我们要用Java操作redis,Jedis,只不过把对应的命令行方式变为了Java中的一些方法
