System.out.println(DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS").format(LocalDateTime.now(ZoneOffset.UTC))); DateTimeFormatter DATE_TIME_FORMATTER = new DateTimeFormatterBuilder() // 解析date+time .appendPattern("yyyyMMddHHmmss") // 解析毫秒數 .appendValue(ChronoField.MILLI_OF_SECOND, 3).toFormatter(); System.out.println(LocalDateTime.parse("20191112133503997", DATE_TIME_FORMATTER));