Redis核心数据结构-Hash

--- Hash: 对象存储 ---

适合存储结构化数据，比序列化整个 JSON 更节省空间且支持单字段修改

存储用户信息 (User ID: 1001)

HSET user:1001 name "Alice" age "30" email "alice@example.com"

获取单个字段

HGET user:1001 name

获取所有字段和值

HGETALL user:1001

增加用户的年龄 (原子操作)

HINCRBY user:1001 age 1

检查字段是否存在

HEXISTS user:1001 phone

批量获取字段

HMGET user:1001 name age

127.0.0.1:6379> HSET user:1001 name "Alice" age "30" email "alice@example.com"
(integer) 3
127.0.0.1:6379> HGET user:1001 name
"Alice"
127.0.0.1:6379> HGETALL user:1001
1) "name"
2) "Alice"
3) "age"
4) "30"
5) "email"
6) "alice@example.com"
127.0.0.1:6379> HINCRBY user:1001 age 1
(integer) 31
127.0.0.1:6379> HEXISTS user:1001 phone
(integer) 0
127.0.0.1:6379> HMGET user:1001 name age
1) "Alice"
2) "31"