Hash数据结构

添加元素

HSET

HSET可以set多个kv数据，但redis的版本需要Redis4.0及以上

Redis Command

 127.0.0.1:6379> HSET student:001 name l4
 (integer) 1

Java

    redisTemplate.opsForHash().put("student:002","name","z3");

HMSET 添加多个

Redis Command

 127.0.0.1:6379> HMSET student:002 id 12 name w5 age 17
 ok

Java

    Map<String,String> map = new HashMap();
    map.put("id","14");
    map.put("name","l8");
    redisTemplate.opsForHash().putAll("student:004",map);

获取数据

HGET

Redis Command

 127.0.0.1:6379> HGET student:002 id 12 
 12

Java

    Map<String,String> map = new HashMap();
    map.put("id","14");
    map.put("name","l8");
    redisTemplate.opsForHash().get("student:002","id");

HMGET

Redis Command

 127.0.0.1:6379> HMSET student:002 id 12 name w5 age 17
 ok

Java

    Map<String,String> map = new HashMap();
    map.put("id","14");
    map.put("name","l8");
    redisTemplate.opsForHash().putAll("student:004",map);

HDEL

删除key

Redis Command

 127.0.0.1:6379> HDEL student:002 id
 (integer) 1

Java

    redisTemplate.opsForHash().delete("student:002","name");

HGETALL

获取key的所有value

Redis Command

 127.0.0.1:6379> HGETALL student:001

HLEN key数量

Redis Command

 127.0.0.1:6379> HLEN student:002
 (integer) 2

Java

    redisTemplate.opsForHash().size("student:002")

HEXISTS 是否包含某key

Redis Command

 127.0.0.1:6379> HEXTISIS student:002 id 
 (integer) 1

Java

    redisTemplate.opsForHash().hasKey("student:002", "id")

HKEYS

获取所有键值对的key

Redis Command

 localhost:6379> HKEYS student:002
 1) "name"
 2) "id"
 3) "age"

Java

    redisTemplate.opsForHash().keys("student:002")

HVALS

获取所有键值对的value

Redis Command

 localhost:6379> HVALS student:002
 1) "3"
 2) "12"
 3) "15"

Java

    redisTemplate.opsForHash().values("student:002")