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JDK8 LocalDateTime 自定义周开始

发布时间 2023-08-23 18:09:12作者: 朱思年
               LocalDateTime now = LocalDateTime.of(2022,12,31,0,1,1);

        WeekFields weekFields = WeekFields.of(DayOfWeek.FRIDAY,1);
        int dayOfWeek = now.getDayOfWeek().get(weekFields.dayOfWeek());
        System.out.println("日期: "+ LocalDateTimeUtil.format(now, DatePattern.NORM_DATETIME_PATTERN));
        System.out.println("第几周weekOfYear: "+now.get(weekFields.weekOfYear()));
        System.out.println("第几周weekOfWeekBasedYear: "+now.get(weekFields.weekOfWeekBasedYear()));
        System.out.println("本周的第几天(从1开始): "+dayOfWeek);
        System.out.println("本周的开始日期: "+now.minusDays(dayOfWeek - 1));
        System.out.println();
        now = now.plusDays(1);
        dayOfWeek = now.getDayOfWeek().get(weekFields.dayOfWeek());
        System.out.println("加一天日期: "+ LocalDateTimeUtil.format(now, DatePattern.NORM_DATETIME_PATTERN));
        System.out.println("第几周weekOfYear: "+now.get(weekFields.weekOfYear()));
        System.out.println("第几周weekOfWeekBasedYear: "+now.get(weekFields.weekOfYear()));
        System.out.println("本周的第几天(从1开始): "+dayOfWeek);
        System.out.println("本周的开始日期: "+now.minusDays(dayOfWeek - 1));
        System.out.println();
        now = now.plusWeeks(1);
        dayOfWeek = now.getDayOfWeek().get(weekFields.dayOfWeek());
        System.out.println("加一周日期: "+ LocalDateTimeUtil.format(now, DatePattern.NORM_DATETIME_PATTERN));
        System.out.println("第几周weekOfYear: "+now.get(weekFields.weekOfYear()));
        System.out.println("第几周weekOfWeekBasedYear: "+now.get(weekFields.weekOfYear()));
        System.out.println("本周的第几天(从1开始): "+dayOfWeek);
        System.out.println("本周的开始日期: "+now.minusDays(dayOfWeek - 1));

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