Hash

redis hash 是一个string 类型的field（字段）和value（值）的映射表，hash特别适合用于存储对象。

常用的命令

hset/hget

存储/获取值

127.0.0.1:6379> hset user:001 id 11 name zs age 25
(integer) 3
127.0.0.1:6379> hget user:001 id
"11"

hmset/hmget

存储所有的值和通过键一次性对应的值

127.0.0.1:6379> hmset user:001 id 12 name zs age 25
OK
127.0.0.1:6379> hmget user:001 id name age
1) "12"
2) "zs"
3) "25"

hgetall

获取所有的键值

127.0.0.1:6379> hgetall user:001
1) "id"
2) "12"
3) "name"
4) "zs"
5) "age"
6) "25"

hdel

通过某个键删除某个值

127.0.0.1:6379> hgetall user:001
1) "id"
2) "12"
3) "name"
4) "zs"
5) "age"
6) "25"
127.0.0.1:6379> hdel user:001 age
(integer) 1
127.0.0.1:6379> hgetall user:001
1) "id"
2) "12"
3) "name"
4) "zs"

hlen 获取某个key内的全部数量

获取某个key内的全部数量

127.0.0.1:6379> hlen user:001
(integer) 2
127.0.0.1:6379> hgetall user:001
1) "id"
2) "12"
3) "name"
4) "zs"

hexists key

在key里面的某一个值的key是否存在存在返回1，不存在返回0

127.0.0.1:6379> hexists user:001 id
(integer) 1
127.0.0.1:6379> hexists user:001 sex
(integer) 0

hkeys/hvals

诺列出全部key/value

127.0.0.1:6379> hkeys user:001
1) "id"
2) "name"
127.0.0.1:6379> hvals user:001
1) "12"
2) "zs"

hincrby

增加指定的整数

127.0.0.1:6379> hgetall user:001
1) "id"
2) "12"
3) "name"
4) "zs"
127.0.0.1:6379> hincrby user:001 id 2
(integer) 14
127.0.0.1:6379> hgetall user:001
1) "id"
2) "14"
3) "name"
4) "zs"

hincrbyfloat

增加指定的小数

127.0.0.1:6379> hincrbyfloat user:001 id 0.5
"14.5"
127.0.0.1:6379> hgetall user:001
1) "id"
2) "14.5"
3) "name"
4) "zs"

hsetnx

不存在赋值，存在无效

127.0.0.1:6379> hsetnx user:001 email 1212@126.com
(integer) 1
127.0.0.1:6379> hsetnx user:001 email 1212@126.com
(integer) 0