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Redis-Set集合的操作.java
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Redis-Set集合的操作.java
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-----------------------
Redis
-
Set集合的操作
|
-----------------------
*
Redis
的set
是String类型的
'无序集合'
(
跟JAVA是不是很像
)
*
Set集合可以包含2的32次幂
-
1
个元素
*
除了基本的增删改查操作之外
,
还有
'包含集合的取并集'
操作
*
还有交集
,
差集等操作
*
每个集合中的元素
,
不能重复
sadd
key
value
*
添加一个元素到key对应的set集合中
*
成功返回1
,
该元素已经存在返回0
,
如果这个set不存在
,
抛出异常
srem
key
value
*
从key对应的set中移除给定的元素
,
成功返回1
smove
key1
key2
value
*
从key1的集合中移除value
,
添加到key2
scard
key
*
返回set元素的个数
sismember
key
value
*
判断value是否在指定的set中
sinter
key1
key2
...
keyn
*
返回所有key的交集
sunion
key1
key2
...
keyn
*
返回所有key的并集
sdiff
key1
key2
...
keyn
*
返回所有key的差集
smembers
key
*
返回key对应的set的所有元素
,
返回结果无序
//卧槽,现在用笔记本键盘感觉好不熟悉啊!!
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