单个字段解决办法

@JsonDeserialize(using = LocalDateTimeDeserializer.class)
@JsonSerialize(using = LocalDateTimeSerializer.class)
LocalDateTime createTime;

全局解决办法

Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
ObjectMapper om = new ObjectMapper();
om.registerModule(new JavaTimeModule());
om.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
jackson2JsonRedisSerializer.setObjectMapper(om);
redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);