LocalDateTime的方法总结 https://www.cnblogs.com/linyu1/p/14079141.html
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"); LocalDateTime d = LocalDateTime.parse("2021-03-04 00:00:00", dtf); System.out.println(d.plusHours(-1).format(dtf));
2021-03-03 23:00:00