mysql表：

userid

username

password

email

9

Lisi

111111

lisi@163.com

对应redis存储：

127.0.0.1:6379> set user:userid:9:username lisi
OK
127.0.0.1:6379> set user:userid:9:password 111111
OK
127.0.0.1:6379> set user:userid:9:email lisi@163.com
OK
127.0.0.1:6379>
127.0.0.1:6379> keys user:userid:9*    #查找有几个属性
1) "user:userid:9:password"
2) "user:userid:9:username"
3) "user:userid:9:email"
127.0.0.1:6379>

如果要通过username来查找信息, 只能通过再建立一个对应关系

127.0.0.1:6379> set user:username:lisi:userid 9    #建立一个username和userid对应的表
OK
127.0.0.1:6379> 
127.0.0.1:6379> get user:username:lisi:userid    #获取到userid
"9"
127.0.0.1:6379> 
127.0.0.1:6379> keys user:userid:9*    #通过userid找到所有键
1) "user:userid:9:password"
2) "user:userid:9:username"
3) "user:userid:9:email"
127.0.0.1:6379> 
127.0.0.1:6379> get user:userid:9:email    #获取其它键的信息
"lisi@163.com"
127.0.0.1:6379>