springboot项目中redis常见的增删改查操作大全

redisTemplate.opsForValue().set("key", "value");

redisTemplate.opsForValue().set("key", "value", 10, TimeUnit.MINUTES);

redisTemplate.opsForValue().set("user:1", user);

redisTemplate.opsForHash().put("user:1", "name", "Tom");
redisTemplate.opsForHash().put("user:1", "age", 18);

redisTemplate.opsForValue().get("key");

redisTemplate.hasKey("key");

redisTemplate.opsForHash().get("user:1", "name");

redisTemplate.opsForHash().entries("user:1");

redisTemplate.getExpire("key");

redisTemplate.opsForValue().set("key", "newValue");

redisTemplate.opsForHash().put("user:1", "name", "Jerry");

redisTemplate.opsForValue().increment("count");

redisTemplate.opsForValue().decrement("stock");

redisTemplate.expire("key", 5, TimeUnit.MINUTES);

redisTemplate.delete("key");

redisTemplate.delete(Arrays.asList("k1", "k2"));

Set<String> keys = redisTemplate.keys("user:*");
redisTemplate.delete(keys);

public User getUser(Long id) {
    String key = "user:" + id;
    // 1. 查缓存
    User user = (User) redisTemplate.opsForValue().get(key);
    if (user != null) {
        return user;
    }
    // 2. 查数据库
    user = userMapper.selectById(id);
    // 3. 放入缓存
    redisTemplate.opsForValue().set(key, user, 30, TimeUnit.MINUTES);
    return user;
}

set + expire

redisTemplate.opsForValue().set("key", "value", 30 + new Random().nextInt(10), TimeUnit.MINUTES);