直接上代码:
// 获取当天日期 LocalDate now = LocalDate.now(); // 当天开始时间 LocalDateTime todayStart = now.atStartOfDay(); // 当天结束时间 LocalDateTime todayEnd = LocalDateTime.of(now, LocalTime.MAX); // 周一 LocalDate monday = now.with(TemporalAdjusters.previousOrSame(DayOfWeek.MONDAY)); // 周日 LocalDate sunday = now.with(TemporalAdjusters.nextOrSame(DayOfWeek.SUNDAY)); // 本周开始时间 LocalDateTime weekStart = monday.atStartOfDay(); // 本周结束时间 LocalDateTime weekEnd = LocalDateTime.of(sunday, LocalTime.MAX); // 本月1号 LocalDate firstDayOfMonth = now.with(TemporalAdjusters.firstDayOfMonth()); // 本月最后一天 LocalDate lastDayOfMonth = now.with(TemporalAdjusters.lastDayOfMonth()); // 本月1号的开始时间 LocalDateTime firstDayOfMonthStart = firstDayOfMonth.atStartOfDay(); // 本月最后一天的最后时间 LocalDateTime firstDayOfMonthEnd = LocalDateTime.of(lastDayOfMonth, LocalTime.MAX); // 今年第一天 LocalDate beginTime = LocalDate.now().with(TemporalAdjusters.firstDayOfYear()); // 今年最后一天 LocalDate endTiime = LocalDate.now().with(TemporalAdjusters.lastDayOfYear()); //获取前一天日期 LocalDate yesterday2 = LocalDate.now().minusDays(1); DateTimeFormatter pattern = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"); System.out.println("当天开始时间 = " + todayStart.format(pattern) + " 时间戳 :" + todayStart.toInstant(ZoneOffset.of("+8")).toEpochMilli()); System.out.println("当天结束时间 = " + todayEnd.format(pattern) + " 时间戳 :" + todayEnd.toInstant(ZoneOffset.of("+8")).toEpochMilli()); System.out.println("本周开始时间 = " + weekStart.format(pattern) + " 时间戳 :" + weekStart.toInstant(ZoneOffset.of("+8")).toEpochMilli()); System.out.println("本周结束时间 = " + weekEnd.format(pattern) + " 时间戳 :" + weekEnd.toInstant(ZoneOffset.of("+8")).toEpochMilli()); System.out.println("本月开始时间 = " + firstDayOfMonthStart.format(pattern) + " 时间戳 :" + firstDayOfMonthStart.toInstant(ZoneOffset.of("+8")).toEpochMilli()); System.out.println("本月结束时间 = " + firstDayOfMonthEnd.format(pattern) + " 时间戳 :" + firstDayOfMonthEnd.toInstant(ZoneOffset.of("+8")).toEpochMilli());
2.当前时间减
LocalDate.now().minusYears(x); //当前日期减去指定的年份 LocalDate.now().minusMonths(x); //当前日期减去指定的月份 LocalDate.now().minusDays(x); //当前日期减去指定的天数 LocalDate.now().minusWeeks(x); //当前日期减去指定的周数
3.时间格式化
DateTimeFormatter formatter3 = DateTimeFormatter.ofPattern("yyyy-MM-dd hh:mm:ss"); //格式化 String str4 = formatter3.format(LocalDateTime.now()); System.out.println(str4);//2021-09-22 06:33:08 //解析 TemporalAccessor parse1 = formatter3.parse(str4); System.out.println(parse1);//{NanoOfSecond=0, MilliOfSecond=0, MinuteOfHour=34, HourOfAmPm=6, SecondOfMinute=6, MicroOfSecond=0},ISO resolved to 2021-09-22