LocalDate、LocalTime和LocalDateTime用法

一.LocalDate用法

1.1.获取当前时间，最大时间，最小时间

/*** 获取当前时间，最大时间，最小时间*/@Testpublic void demo01() {LocalDate now = LocalDate.now();LocalDate max = LocalDate.MAX;LocalDate min = LocalDate.MIN;log.info("当前时间：" + now);log.info("获取最大时间：" + max);log.info("获取最小时间：" + min);}

1.2.自定义日期

 /*** 自定义日期*/@Testpublic void demo02() {LocalDate date = LocalDate.of(2019, 12, 24);log.info("自定义日期：" + date);}

1.3.获取当前日期是所在年的第几天、月的第几天、当前星期

/*** 获取当前日期是所在年的第几天、月的第几天、当前星期*/@Testpublic void demo03() {LocalDate now = LocalDate.now();int year = now.getDayOfYear();int month = now.getDayOfMonth();DayOfWeek week = now.getDayOfWeek();log.info("获取年份：" + year);log.info("获取月份：" + month);log.info("获取星期：" + week);}

1.4.获取当前月和当前月天数

/*** 获取当前月，当前月天数*/@Testpublic void demo04() {LocalDate now = LocalDate.now();Month month = now.getMonth();int monthValue = now.getMonthValue();int i = now.lengthOfMonth();log.info("当前月：" + month);log.info("当前月：" + monthValue);log.info("当前月天数：" + i);}

1.5.获取当前年份的天数和是否是闰年

/*** 获取当前年份的天数和是否是闰年*/@Testpublic void demo05() {LocalDate now = LocalDate.now();int i = now.lengthOfYear();boolean leapYear = now.isLeapYear();log.info("获取当前年的天数：" + i);log.info("获取当前年是否是闰年：" + leapYear);}

1.6.with指定年月日

/*** with指定年月日*/@Testpublic void demo06() {LocalDate now = LocalDate.now();LocalDate localDate = now.withDayOfMonth(1);LocalDate localDate1 = now.withDayOfYear(21);LocalDate localDate2 = now.withMonth(3);LocalDate localDate3 = now.withYear(2004);log.info("当月的指定日:" + localDate);log.info("获取今年第一月的指定日期:" + localDate1);log.info("今年指定月份，日为当天的日期:" + localDate2);log.info("指定年份的今天:" + localDate3);}

1.7.当前日期加减

 /*** 当前日期加减*/@Testpublic void demo07() {LocalDate now = LocalDate.now();LocalDate localDate = now.minusDays(1);LocalDate localDate1 = now.minusWeeks(1);LocalDate localDate2 = now.minusMonths(1);LocalDate localDate3 = now.minusYears(1);LocalDate localDate4 = now.plusDays(1);LocalDate localDate5 = now.plusWeeks(1);LocalDate localDate6 = now.plusMonths(1);LocalDate localDate7 = now.plusYears(1);log.info("当前日期的前一天：" + localDate);log.info("当前日期的前一星期：" + localDate1);log.info("当前日期的前一个月：" + localDate2);log.info("当前日期的前一年：" + localDate3);log.info("当前日期的后一天：" + localDate4);log.info("当前日期的后一星期：" + localDate5);log.info("当前日期的后一月：" + localDate6);log.info("当前日期的后一年：" + localDate7);}

二.LocalTime

2.1.获取当前时间

 /*** 获取当前时间*/@Testpublic void demo08() {LocalTime now = LocalTime.now();log.info("当前时间：" + now);}

2.2.指定时分秒

 /*** 指定时分秒*/@Testpublic void demo09() {LocalTime time1 = LocalTime.of(12, 9);LocalTime time2 = LocalTime.of(12, 9, 10);log.info("指定时分：" + time1);log.info("指定时分秒：" + time2);}

2.3.获取当前时间的时分秒

/*** 获取当前时间的时分秒*/@Testpublic void demo10() {LocalTime now = LocalTime.now();int hour = now.getHour();int minute = now.getMinute();int second = now.getSecond();log.info("当前时间的时：" + hour);log.info("当前时间的分：" + minute);log.info("当前时间的秒：" + second);}

2.4.替换当前的时分秒

/*** 替换时分秒*/@Testpublic void demo11() {LocalTime now = LocalTime.now();LocalTime time1 = now.withHour(1);LocalTime time2 = now.withMinute(21);LocalTime time3 = now.withSecond(31);log.info("替换当前的时：" + time1);log.info("替换当前的分：" + time2);log.info("替换当前的秒：" + time3);}

2.5.当前时间加减

 /*** 当前时间加减*/@Testpublic void demo12() {LocalTime now = LocalTime.now();LocalTime time1 = now.minusHours(1);LocalTime time2 = now.minusMinutes(1);LocalTime time3 = now.minusSeconds(1);LocalTime time4 = now.plusHours(1);LocalTime time5 = now.plusMinutes(1);LocalTime time6 = now.plusSeconds(1);log.info("当前时间减一小时：" + time1);log.info("当前时间减一分钟：" + time2);log.info("当前时间减一秒：" + time3);log.info("当前时间加一小时：" + time4);log.info("当前时间加一分钟：" + time5);log.info("当前时间加一秒：" + time6);}

三.LocalDateTime

3.1.获取当前时间

  /*** 获取当前时间*/@Testpublic void demo13() {LocalDateTime now = LocalDateTime.now();log.info("获取当前时间：" + now);}

3.2.指定日期

/*** 指定当前时间*/@Testpublic void demo14() {LocalDateTime now = LocalDateTime.now();LocalDateTime time1 = now.withYear(2012);LocalDateTime time2 = now.withMonth(12);LocalDateTime time3 = now.withDayOfMonth(23);LocalDateTime time4 = now.withHour(8);LocalDateTime time5 = now.withMinute(8);LocalDateTime time6 = now.withSecond(8);log.info("指定当前年份：" + time1);log.info("指定当前月份：" + time2);log.info("指定当前日：" + time3);log.info("指定当前时：" + time4);log.info("指定当前分：" + time5);log.info("指定当前秒：" + time6);}

3.3.获取当前日期的单个参数

/*** 获取当前日期的单个参数*/@Testpublic void demo15() {LocalDateTime now = LocalDateTime.now();int dayOfYear = now.getDayOfYear();int dayOfMonth = now.getDayOfMonth();int monthValue = now.getMonthValue();DayOfWeek dayOfWeek = now.getDayOfWeek();int hour = now.getHour();int minute = now.getMinute();int second = now.getSecond();log.info("获取当前日期在今年的第几天：" + dayOfYear);log.info("获取当前日期是本月的第几天：" + dayOfMonth);log.info("获取当前的月份：" + monthValue);log.info("获取当前的星期：" + dayOfWeek);log.info("获取当前的时：" + hour);log.info("获取当前的分：" + minute);log.info("获取当前的秒：" + second);}

** 3.4.当前日期加减**

/*** 当前日期加减*/@Testpublic void demo16() {LocalDateTime now = LocalDateTime.now();LocalDateTime time1 = now.minusYears(1);LocalDateTime time2 = now.minusMonths(12);LocalDateTime time3 = now.minusWeeks(1);LocalDateTime time4 = now.minusDays(21);LocalDateTime time5 = now.minusHours(21);LocalDateTime time6 = now.minusMinutes(21);LocalDateTime time7 = now.minusSeconds(21);LocalDateTime time8 = now.plusYears(1);LocalDateTime time9 = now.plusMonths(12);LocalDateTime time10 = now.plusWeeks(1);LocalDateTime time11 = now.plusDays(21);LocalDateTime time12 = now.plusHours(21);LocalDateTime time13 = now.plusMinutes(21);LocalDateTime time14 = now.plusSeconds(21);log.info("当前时间减一年：" + time1);log.info("当前时间减12个月：" + time2);log.info("当前时间减一星期：" + time3);log.info("当前时间减21天：" + time4);log.info("当前时间减21小时：" + time5);log.info("当前时间减21分钟：" + time6);log.info("当前时间减21秒：" + time7);log.info("当前时间加一年：" + time8);log.info("当前时间加12个月：" + time9);log.info("当前时间加一星期：" + time10);log.info("当前时间加21天：" + time11);log.info("当前时间加21小时：" + time12);log.info("当前时间加21分钟：" + time13);log.info("当前时间加21秒：" + time14);}

3.5.获取当前日期和指定日期

/*** 获取当前日期和指定日期*/@Testpublic void demo17() {LocalDateTime now = LocalDateTime.of(LocalDate.now(), LocalTime.now());LocalDateTime time1 = LocalDateTime.of(2010, Month.JULY, 12, 12, 12);log.info("获取当前日期：" + now);log.info("指定日期：" + time1);}

四.开发常用

4.1.转换

/*** 转化*/@Testpublic void demo18() {LocalDateTime now1 = LocalDateTime.now();LocalDate date1 = now1.toLocalDate();LocalTime time1 = now1.toLocalTime();LocalDate now2 = LocalDate.now();LocalDateTime date2 = now2.atStartOfDay();String format = now1.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:ss:mm"));Long newSecond = LocalDateTime.now().toInstant(ZoneOffset.of("+8")).toEpochMilli();log.info("LocalDateTime转LocalDate：" + date1);log.info("LocalDateTime转LocalTime：" + time1);log.info("LocalDate转LocalDateTime：" + date2);log.info("LocalDateTime格式化：" + format);log.info("获取毫秒时间：" + newSecond);}

4.2.计算差值

 /*** 计算差值*/@Testpublic void demo19() {String date = "2019-01-01 01:12:12";LocalDateTime parseDate = LocalDateTime.parse(date, DateTimeFormatter.ofPattern("yyyy-MM-dd HH:ss:mm"));Duration betweenDate = Duration.between(parseDate, LocalDateTime.now());long days = betweenDate.toDays();long hours = betweenDate.toHours();long minutes = betweenDate.toMinutes();LocalDate parseDate1 = parseDate.toLocalDate();Period betweenDate1 = Period.between(parseDate1, LocalDate.now());int months = betweenDate1.getMonths();int days1 = betweenDate1.getDays();int months1 = betweenDate1.getMonths();int years = betweenDate1.getYears();log.info("天的差值:" + days);log.info("时差值:" + hours);log.info("分差值:" + minutes);log.info("比较月之间差值:" + months);log.info("比较天之间的差值:" + days1);log.info("月份榨汁:" + months1);log.info("年份差值:" + years);}

4.3.获取年、月、周的第一天和最后一天

 /*** 极限值*/@Testpublic void demo20() {LocalDateTime now = LocalDateTime.now();LocalDateTime monday = now.with(DayOfWeek.MONDAY);LocalDateTime sunday = now.with(DayOfWeek.SUNDAY);log.info("当前周的周一：" + monday);log.info("当前周的周日：" + sunday);LocalDateTime firstday = now.with(TemporalAdjusters.firstDayOfMonth());LocalDateTime lastDay = now.with(TemporalAdjusters.lastDayOfMonth());log.info("当前月的第一天：" + firstday);log.info("当前月的最后一天：" + lastDay);LocalDate start = LocalDate.now().with(TemporalAdjusters.firstDayOfYear());LocalDate end = LocalDate.now().with(TemporalAdjusters.lastDayOfYear());log.info("今年的第一天：" + start);log.info("今年的最后一天：" + end);LocalDate lastStart = LocalDate.now().plusYears(-1).with(TemporalAdjusters.firstDayOfYear());LocalDate lastEnd = LocalDate.now().plusYears(-1).with(TemporalAdjusters.lastDayOfYear());log.info("去年的第一天：" + lastStart);log.info("去年的最后一天：" + lastEnd);LocalDate nextStart1 = LocalDate.now().plusYears(1).with(TemporalAdjusters.firstDayOfYear());LocalDate nextStart2 = LocalDate.now().with(TemporalAdjusters.firstDayOfNextYear());LocalDate nextEnd1 = LocalDate.now().plusYears(1).with(TemporalAdjusters.lastDayOfYear());log.info("明年的第一天：" + nextStart1);log.info("明年的第一天：" + nextStart2);log.info("明年的最后一天：" + nextEnd1);}

4.4.获得当天的最大时间和最小时间

/*** 获取今天的最大时间和最小时间*/@Testpublic void demo21() {LocalDateTime now = LocalDateTime.now();// 获取当前星期的第一天和最后一天LocalDateTime startTime = LocalDateTime.of(LocalDate.now(), LocalTime.MAX);LocalDateTime endTime = LocalDateTime.of(LocalDate.now(), LocalTime.MIN);log.info("当天最小时间：" + startTime);log.info("当天最大时间：" + endTime);}

LocalDate、LocalTime和LocalDateTime用法相关推荐

关于LocalDate、LocalTime、LocalDateTime
0.快速上手看源码: https://www.matools.com/api/java8 在java.time中 //获取当前时间 LocalDateTime localDateTime = Loc ...
Java 8 Time Api 使用(LocalDate，LocalTime和LocalDateTime等)
目录 1.概述 2. 旧的时间API(java8之前)的问题 3. 使用LocalDate,LocalTime和LocalDateTime 3.1.使用LocalDate 3.2.使用LocalTim ...
JDK8新特性LocalDate、LocalTime和LocalDateTime
LocalDate.LocalTime和LocalDateTime这三个类是JDK1.8出来的新特性,用于时间和日期的支持,这三个类位于java.time包下面. LocalDate: LocalDa ...
Java中 LocalDate、LocalTime、LocalDateTime三个时间工具类的使用介绍
Java中 LocalDate.LocalTime.LocalDateTime三个时间工具类的使用介绍一.背景: 之前在做项目的过程中,对日期时间类没有一个系统的了解,总是在用的时候去搜索一下,解决 ...
JDK8 Instant类的使用和LocalDate，LocalTime 和 LocalDateTime的介绍。
简介在Java 8中又为我们提供了新的日期类.它可以帮我们更精确的保存记录时间. 本文章主要介绍的就是Instant,LocalDate,LocalTime 和 LocalDateTime 这几个类 ...
9 mybatis中使用Java8的日期LocalDate、LocalTime、LocalDateTime
注意: 1.大家知道,在实体Entity里面,可以使用java.sql.Date.java.sql.Timestamp.java.util.Date来映射到数据库的date.timestamp.dat ...
LocalDate、LocalTime、LocalDateTime介绍
一.Date与LocalDate.LocalTime.LocalDateTime互转 1.Date转LocalDate.LocalTime.LocalDateTime Date date = new ...
Java关于LocalDate、LocalTime、LocalDateTime类的详细讲解
Java关于日期和时间相关API必须明白的方法和类(JDK8之后部分) 文章目录 Java关于日期和时间相关API必须明白的方法和类(JDK8之后部分) 新日期时间API出现的背景新时间日期API ...
LocalDate、LocalTime、LocalDateTime使用与区别
前言 LocalDate.LocalTime.LocalDateTime这三个类是java8新提供的时间操作类 LocalDate: 主管yyyy-MM-dd这种形式,也就是只管:年-月-日 Loca ...