Redis 字符串与哈希

/***

* 字符串 redis里的字符串

***/

//设置key的值 

redis 127.0.0.1:6379> set key 'my name is imay' 

//设置值的过期时间 (单位 :　秒)

redis 127.0.0.1:6379> expire key1 30 
 (integer) 1

//获取key的值

redis 127.0.0.1:6379> get key 

"my name is imay"

//删除这个key

redis 127.0.0.1:6379> del key 

(integer) 1

//更改这个key1 为 key11

redis 127.0.0.1:6379> rename key1 key11　
OK

//incr  将page 值加1

//decr 将page值减1

redis 127.0.0.1:6379> set page 0
OK
redis 127.0.0.1:6379> incr page

 //给page 尾端追加字符串

redis 127.0.0.1:6379> append page "~3"
(integer) 3
redis 127.0.0.1:6379> get page
"2~3"

// decrby 给 count 减去等量的值  如果值不存在,值以0开始计算

// incrby 是给count 加,同上

redis 127.0.0.1:6379> set count 100
OK
redis 127.0.0.1:6379> decrby count 10
(integer) 90

/***

* 哈希(hash) 哈希在redis里作为一种对象存储方式

***/

// hset 单个设置member 的组 name值

redis 127.0.0.1:6379> hset member name wenbo
(integer) 1
redis 127.0.0.1:6379> hset member age 18
(integer) 1

//hget 获取member name 的值
redis 127.0.0.1:6379> hget member name
"wenbo"
// hmget 批量获取member 的值
redis 127.0.0.1:6379> hmget member name age
1) "wenbo"
2) "18"

//hgetall 获取hash表的member所有域和值

redis 127.0.0.1:6379> hgetall member
1) "name"
2) "wenbo"
3) "age"
4) "18"

//hexists 判断 member name 的值是否存在

redis 127.0.0.1:6379> hexists member name
(integer) 1

// hkeys获取 member 所有域

redis 127.0.0.1:6379> hkeys member
1) "name"
2) "age"

//hvals 获取member 所有域的值

redis 127.0.0.1:6379> hvals member
1) "wenbo"
2) "18"

//hincrby 增加或减少 域的值, 如果域不存在,则从0开始计算

redis 127.0.0.1:6379> hincrby member age 2
(integer) 20
redis 127.0.0.1:6379> hincrby member age -2
(integer) 18

//hkeys获取域

redis 127.0.0.1:6379> hkeys member
1) "name"
2) "age"

//hdel 删除一个域的值

redis 127.0.0.1:6379> hdel member sex
(integer) 1

//hdel 删除 多个( age name )域的值

redis 127.0.0.1:6379> hdel member age name
(integer) 2

//hlen 获取域的个数 

redis 127.0.0.1:6379> hlen user
(integer) 1