体验
$ redis-cli
127.0.0.1:6379> ping
PONG
127.0.0.1:6379> set name peng
OK
127.0.0.1:6379> get name
"peng"
127.0.0.1:6379> set stock 999
OK
127.0.0.1:6379> get stock
"999"
127.0.0.1:6379> incr stock
(integer) 1000
127.0.0.1:6379> get stock
"1000"
127.0.0.1:6379> incr stock
(integer) 1001
127.0.0.1:6379> get stock
"1001"
127.0.0.1:6379>
