redis读取JSON格式数据

public String getStringBySer(String key) {
    try {
        return (String) redisTemplate.execute((RedisCallback) connection -> {
            RedisSerializer serializer = redisTemplate.getStringSerializer();
            byte[] serialize = serializer.serialize(key);
            if (serialize == null) {
                return null;
            }
            byte[] value = connection.get(serialize);
            return serializer.deserialize(value);
        });
    } catch (Exception e) {
        return null;
    }
}