Redis hashes存储的操作方法
欢迎大家加入 459479177QQ群进行交流上篇我们讲到string的操作方法，其实hashes与其类似，只不过命令格式不同而已。
使用redis-cli进入redis：
# redis-cli
127.0.0.1:6379>
1、添加
a>hset
方法：hset key filed value
描述：与set一样，不存在增加，否则更新返回1表示新的filed，0表示filed已存在并用new value覆盖old value
127.0.0.1:6379> hset user:0001 name Sunshine
(integer) 1
127.0.0.1:6379> hget user:0001 name
"Sunshine"
127.0.0.1:6379> hset user:0001 name SunshineBoy
(integer) 0
127.0.0.1:6379> hget user:0001 name
"SunshineBoy"
b>hsetnx
方法：hsetnx key filed value
描述：与setnx一样，filed为指定value，如果key不存在先创建，否则返回0
127.0.0.1:6379> hsetnx user:0002 name Sunshineone
(integer) 1
127.0.0.1:6379> hget user:0002 name
"Sunshineone"
127.0.0.1:6379> hsetnx user:0002 name Sunshinetwo
(integer) 0
127.0.0.1:6379> hget user:0002 name
"Sunshineone"
c>hmset
方法：hmset key filed value
描述：与mset一样，成功返回OK，如果filed存在就更新
127.0.0.1:6379> hmset user:003 name Sunshine age 25
OK
127.0.0.1:6379> hmset user:003 name Sunshine age 23
OK
127.0.0.1:6379> hmget user:003 name age
1) "Sunshine"
2) "23"
2、查看
a>hget
方法：hget key filed
描述：与get一样，查看key的filed的value
127.0.0.1:6379> hget user:0002 name
"Sunshineone"
b>hmget
方法：hmget key filed
127.0.0.1:6379> hmget user:003 name
1) "Sunshine"
127.0.0.1:6379> hmget user:003 name age
1) "Sunshine"
2) "23"
d>hlen
方法: hlen key
描述：查看key有多个filed
127.0.0.1:6379> hkeys user:003
1) "name"
2) "age"
127.0.0.1:6379> hlen user:003
(integer) 2
127.0.0.1:6379> hkeys user:0001
1) "name"
127.0.0.1:6379> hlen user:0001
(integer) 1
e>hkeys
方法：hkey key
描述：查看并显示key的filedname
127.0.0.1:6379> hkeys user:0001
1) "name"
127.0.0.1:6379> hkeys user:0002
1) "name"
127.0.0.1:6379> hkeys user:003
1) "name"
2) "age"
127.0.0.1:6379> hkeys key:1
1) "value"
f>hvals
方法：hvals key
描述：插卡并电视key的filed值
127.0.0.1:6379> hvals user:0001
1) "SunshineBoy"
127.0.0.1:6379> hvals user:0002
1) "Sunshineone"
127.0.0.1:6379> hvals user:003
1) "Sunshine"
2) "23"
127.0.0.1:6379> hvals key:1
1) "20"
g>hgetall
方法：hgetall key
描述：查看并显示key的filedname及filedvalue
127.0.0.1:6379> hgetall user:0001
1) "name"
2) "SunshineBoy"
127.0.0.1:6379> hgetall user:0002
1) "name"
2) "Sunshineone"
127.0.0.1:6379> hgetall user:003
1) "name"
2) "Sunshine"
3) "age"
4) "23"
127.0.0.1:6379> hgetall key:1
1) "value"
2) "20"
3、修改
a>hincry
方法：方法与incrby一样，hashes没有递增递减
127.0.0.1:6379> hset key:1 value 20
(integer) 1
127.0.0.1:6379> hget key:1 value
"20"
127.0.0.1:6379> hincrby key:1 value 10
(integer) 30
127.0.0.1:6379> hget key:1 value
"30"
127.0.0.1:6379> hincrby key:1 value -10
(integer) 20
127.0.0.1:6379> hget key:1 value
"20"
b>hincrbyfloat
方法：hincrbyfloat key filed incr_by_number
描述：用于浮点数，如果存在则递增递减，否则初始化值为0并设定当前值，下面为官方解释
Redis Hincrbyfloat 命令用于为哈希表中的字段值加上指定浮点数增量值。
如果指定的字段不存在，那么在执行命令前，字段的值被初始化为 0 。
127.0.0.1:6379> hincrbyfloat key:2 value 2.6
"2.6"
127.0.0.1:6379> hget key:2 value
"2.6"
127.0.0.1:6379> hincrbyfloat key:2 value 1.3
"3.9"
127.0.0.1:6379> hget key:2 value
"3.9"
127.0.0.1:6379> hincrbyfloat key:2 value -1.3
"2.6"
127.0.0.1:6379> hget key:2 value
"2.6"
4、测试
a>hexists
方法：hexists key filed
描述：如果存在返回1，否则返回0
127.0.0.1:6379> hexists key:1 value1
(integer) 0
127.0.0.1:6379> hexists key:2 value
(integer) 0
127.0.0.1:6379> hexists key:1 value
(integer) 1
至此Redis Heashes就介绍完毕啦
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