redis简单应用demo - 订单号自增长的思路：业务编码+地区+自增数值

redis简单应用demo 1.字符串 127.0.0.1:6379> set hello toney OK 127.0.0.1:6379> type hello string 127.0.0.1:6379> get hello "toney"

2.Hash哈希表HashMap<key,HashMap<>> 127.0.0.1:6379> hset hash_test a 1 (integer) 1 127.0.0.1:6379> hset hash_test b 2 (integer) 1 127.0.0.1:6379> hgetall hash_test 1) "a" 2) "1" 3) "b" 4) "2" 127.0.0.1:6379> hget hash_test (error) ERR wrong number of arguments for 'hget' command 127.0.0.1:6379> hget hash_test a "1" 127.0.0.1:6379> hget hash_test b "2" 127.0.0.1:6379> hkeys hash_test 1) "a" 2) "b"

3.List列表(存在重复的情况) 127.0.0.1:6379> lpush study redis (integer) 1 127.0.0.1:6379> lpush study mongodb (integer) 2 127.0.0.1:6379> lpush study mysql (integer) 3 127.0.0.1:6379> lpush study mysql (integer) 4 127.0.0.1:6379> lrange study 0 10 1) "mysql" 2) "mysql" 3) "mongodb" 4) "redis"

4.set集合(不存在重复的情况) 127.0.0.1:6379> sadd roomInfo::1001 tony (integer) 1 127.0.0.1:6379> sadd roomInfo::1001 mike (integer) 1 127.0.0.1:6379> sadd roomInfo::1001 steve (integer) 1 127.0.0.1:6379> scard roomInfo::1001 (integer) 3 127.0.0.1:6379> smembers roomInfo::1001 1) "mike" 2) "steve" 3) "tony"

5.sortedSet有序集合(有序集合的成员是唯一的,但分数(score)却可以重复。) 127.0.0.1:6379> zadd itScort 1 redis (integer) 1 127.0.0.1:6379> zadd itScort 2 mongodb (integer) 1 127.0.0.1:6379> zadd itScort 3 mysql (integer) 1 127.0.0.1:6379> zadd itScort 3 mysql (integer) 0 127.0.0.1:6379> zadd itScort 4 mysql (integer) 0 127.0.0.1:6379> zadd itScort 3 es (integer) 1 127.0.0.1:6379> type itScort zset 127.0.0.1:6379> zrange itScort 0 10 WITHSCORES 1) "redis" 2) "1" 3) "mongodb" 4) "2" 5) "es" 6) "3" 7) "mysql" 8) "4"

6.订单自增长的思路：业务编码+地区+自增数值 127.0.0.1:6379> set orderId 1 OK 127.0.0.1:6379> incr orderId (integer) 2 127.0.0.1:6379> incr orderId (integer) 3 127.0.0.1:6379> get orderId "3" 127.0.0.1:6379> incr orderId (integer) 4 127.0.0.1:6379> get orderId "4"