RedisTemplate 使用之Hash

java 复制代码

@GetMapping("hashTest")
    public void test(){
        // 设置 hash 值,user是key，name是hashKey
        //key和hashKey标识一个hash值
        redisTemplate.opsForHash().put("user", "name", "John");
        redisTemplate.opsForHash().put("user", "age", "30");

        // 获取 hash 值
        String name = (String) redisTemplate.opsForHash().get("user", "name");
        System.out.println("Name: " + name);

        // 获取所有 hash 键值对
        Map<Object, Object> user = redisTemplate.opsForHash().entries("user");
        for (Map.Entry<Object, Object> objectEntry : user.entrySet()) {
            System.out.println(objectEntry.getKey() + ":" + objectEntry.getValue());
        }
    }

也可通过Map设置多个哈希字段的值

java 复制代码

		Map<String, Object> map = new HashMap<>();
        map.put("name", "John");
        map.put("age", "31");
        redisTemplate.opsForHash().putAll("user", map);

        // 获取所有 hash 键值对
        Map<Object, Object> user = redisTemplate.opsForHash().entries("user");
        for (Map.Entry<Object, Object> objectEntry : user.entrySet()) {
            System.out.println(objectEntry.getKey() + ":" + objectEntry.getValue());
        }

设置过期时间

java 复制代码

redisTemplate.opsForHash().getOperations().expire("user", 10, TimeUnit.SECONDS);

获取多个哈希字段的值

java 复制代码

        List<Object> objects = redisTemplate.opsForHash().multiGet("user", Arrays.asList("name", "age"));

判断哈希中是否存在指定的字段

java 复制代码

        Boolean hasKey = redisTemplate.opsForHash().hasKey("user", "name");

获取哈希的所有字段

java 复制代码

Set<Object> keys = redisTemplate.opsForHash().keys("user");

获取哈希的所有值

java 复制代码

List<Object> values = redisTemplate.opsForHash().values("user");

获取哈希的所有字段和对应的值

java 复制代码

Map<Object, Object> entries = redisTemplate.opsForHash().entries("user");

将指定字段的值增加指定步长

java 复制代码

Map<String, Object> map = new HashMap<>();
        map.put("name", "John");
        map.put("age", 31);
        redisTemplate.opsForHash().putAll("user", map);

        Long incrementedValue = redisTemplate.opsForHash().increment("user", "age", 5);


        System.out.println("Incremented Value: " + incrementedValue);