LocalDateTime与时间戳互转

long epochMilli = LocalDateTime.now().plusHours(2).toInstant(ZoneOffset.UTC).toEpochMilli();
log.info("timestamp={}", epochMilli);
Instant instant = Instant.ofEpochMilli(epochMilli);
LocalDateTime localDateTime = LocalDateTime.ofInstant(instant, ZoneOffset.UTC);
log.info("time={}", localDateTime);