Redis Hash是一个string类型的field和value的映射表,hash特别适合用于存储对象
Redis中每个hash可以存储2^32 - 1键值对(40多亿)
127.0.0.1:6379> HMSETchisjMap name "redis tutorial" description "redis basic commandsfor caching"
127.0.0.1:6379>HGETALL chisjMap
4)"redis basic commands for caching"