【随记】LocalDateTime

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最新推荐文章于 2024-05-27 08:30:00 发布

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分类专栏：随记文章标签： java

本文链接：https://blog.youkuaiyun.com/qq_32495629/article/details/107127418

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1. 获取当前时间

LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

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2020-07-04 17:25:21

2. 获取本日起始时间点与截止时间

LocalDateTime.of(LocalDate.now(), LocalTime.MIN)
.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
LocalDateTime.of(LocalDate.now(), LocalTime.MAX)
.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

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2020-07-04 00:00:00
2020-07-04 23:59:59

3. 获取本周开始时间与结束时间

LocalDateTime.of(LocalDate.now().with(DayOfWeek.MONDAY), LocalTime.MIN)
.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
LocalDateTime.of(LocalDate.now().with(DayOfWeek.SUNDAY), LocalTime.MAX)
.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

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2020-06-29 00:00:00
2020-07-05 23:59:59

4. 获取本月开始时间与结束时间

LocalDateTime.of(LocalDate.now().with(TemporalAdjusters.firstDayOfMonth()), LocalTime.MIN)
.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
LocalDateTime.of(LocalDate.now().with(TemporalAdjusters.lastDayOfMonth()), LocalTime.MAX)
.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));

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2020-07-01 00:00:00
2020-07-31 23:59:59

5.日期字符串转为LocalDateTime

 DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
 LocalDateTime localDateTime = LocalDateTime.parse("2020-07-04 00:00:00",formatter);

6.计算LocalDateTime之间相差秒数

 DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
 LocalDateTime now = LocalDateTime.now();
 LocalDateTime endTime = LocalDateTime.parse("2020-07-04 17:42:50",formatter);
 Duration duration = Duration.between(now,endTime);
 System.out.println(now + "->" + endTime + "相差秒数为:" + duration.getSeconds());

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 2020-07-04T17:42:28.103->2020-07-04T17:42:50相差秒数为:21