字符串类型是Redis中最为基础的数据存储类型,它在Redis中是二进制安全的,这便意味着该类型可以接受任何格式的数据,如JPEG图像数据或Json对象描述信息等。在Redis中字符串类型的Value最多可以容纳的数据长度是512M。
如果设置的键不存在则为添加,如果设置的键已经存在则修改
set key value
127.0.0.1:6379[1]> set name aron.li
OK
127.0.0.1:6379[1]> get name
"aron.li"
# 继续给name设置fat.white,可以看到直接修改之前的值
127.0.0.1:6379[1]> set name fat.white
OK
127.0.0.1:6379[1]> get name
"fat.white"
127.0.0.1:6379[1]>
setex key seconds value
name
,值为dufu
,过期时间为3
秒的数据127.0.0.1:6379[1]> setex name 3 dufu
OK
127.0.0.1:6379[1]> get name
"dufu"
127.0.0.1:6379[1]> get name
(nil)
127.0.0.1:6379[1]>
mset key1 value1 key2 value2 ...
a1
==> 值为python
、键为a2
==> 值为java
、键为a3
==>值为c
127.0.0.1:6379[1]> mset a1 python a2 java a3 c
OK
127.0.0.1:6379[1]> get a1
"python"
127.0.0.1:6379[1]> get a2
"java"
127.0.0.1:6379[1]> get a3
"c"
127.0.0.1:6379[1]>
append key value
127.0.0.1:6379[1]> get a1
"python"
127.0.0.1:6379[1]> APPEND a1 "haha"
(integer) 10
127.0.0.1:6379[1]> get a1
"pythonhaha"
127.0.0.1:6379[1]>
get key
127.0.0.1:6379[1]> get name
(nil)
127.0.0.1:6379[1]> get a2
"java"
127.0.0.1:6379[1]>
mget key1 key2 ...
127.0.0.1:6379[1]> mget a1 a2 a3
1) "pythonhaha"
2) "java"
3) "c"
127.0.0.1:6379[1]>
del key1 key2 ...
127.0.0.1:6379[1]> mget a1 a2 a3
1) "pythonhaha"
2) "java"
3) "c"
127.0.0.1:6379[1]> del a2 a3
(integer) 2
127.0.0.1:6379[1]> mget a1 a2 a3
1) "pythonhaha"
2) (nil)
3) (nil)
127.0.0.1:6379[1]>