Redis中的hash 先当于 JAVA中 HashMap<String,String>
1、 hset——设置key对应的HashMap中的field的value
127.0.0.1:6379> hset map1 name ermu
(integer) 1
127.0.0.1:6379> hmset map1 age 22 height 170
OK
2.hsetnx
127.0.0.1:6379> hsetnx map1 name ermu1
(integer) 0
127.0.0.1:6379> hsetnx map1 selfinfo "hellow word!"
(integer) 1
3.hexists
127.0.0.1:6379> hexists map1 name
(integer) 1
127.0.0.1:6379> hexists map1 other
(integer) 0
4、 hget——获取key对应的HashMap中的field的value
127.0.0.1:6379> hget map1 name
"ermu"
5、 hgetall——获取key对应的HashMap中的所有field的value
127.0.0.1:6379> hgetall map1
1) "name"
2) "ermu"
3) "age"
4) "22"
5) "height"
6) "170"
6. hdel
127.0.0.1:6379> hgetall map1
1) "name"
2) "ermu"
3) "age"
4) "22"
5) "height"
6) "170"
7) "selfinfo"
8) "hellow word!"
127.0.0.1:6379> hdel map1 selfinfo
(integer) 1
127.0.0.1:6379> hgetall map1
1) "name"
2) "ermu"
3) "age"
4) "22"
5) "height"
6) "170"
127.0.0.1:6379> hdel map1 other
(integer) 0
7、hlen--返回key对应的HashMap中的field的数量
127.0.0.1:6379> hlen map1
(integer) 3
8、hstrlen key->field->value的长度
127.0.0.1:6379> HSTRLEN map1 name
(integer) 4
127.0.0.1:6379> HSTRLEN map1 age
(integer) 2
9、hincrby
127.0.0.1:6379> HINCRBY map1 age 20
(integer) 42
10、hincrbyfloat
127.0.0.1:6379> HINCRBYFLOAT map1 height 2.1
"172.10000000000000001"
127.0.0.1:6379> HSET map1 number 22.44
(integer) 1
127.0.0.1:6379> HINCRBYFLOAT map1 number 2.3
"24.74"
11、HKEYS
127.0.0.1:6379> HKEYS map1
1) "name"
2) "age"
3) "height"
4) "number"
12、HVALS
127.0.0.1:6379> HVALS map1
1) "ermu"
2) "42"
3) "172.10000000000000001"
4) "24.74"