关于java:LocalDateTime-获取最早最晚时间

    switch (timeUnitEnum){      case WEEK:        condition.setTimeBegin(condition.getTime().with(DayOfWeek.MONDAY).with(LocalTime.MIN));        condition.setTimeBegin(condition.getTime().with(DayOfWeek.SUNDAY).with(LocalTime.MAX));        break;      case MONTH:        condition.setTimeBegin(condition.getTime().with(TemporalAdjusters.firstDayOfMonth()).with(LocalTime.MIN));        condition.setTimeBegin(condition.getTime().with(TemporalAdjusters.lastDayOfMonth()).with(LocalTime.MAX));        break;      default:break;    }

LocalDateTime 获取以后（年/月）第一天及最初一天 及 获取当天起始工夫

LocalDateTime获取每周，每月，每年的第一天和最初一天，获取一周七天的日期，获取每月的所有日期