Java获取指定日期的月初和月末日子

/*** 获取指定日期的月初和月末日子** @param day 日期20200202*/
public static Date[] getMonthStartEnd(Date day) {LocalDateTime now = day.toInstant().atZone(ZoneId.systemDefault()).toLocalDateTime();LocalDateTime first = LocalDateTime.of(now.getYear(), now.getMonth(), 1, 0, 0, 0, 0);LocalDateTime last = LocalDateTime.of(first.with(TemporalAdjusters.lastDayOfMonth()).getYear(),first.with(TemporalAdjusters.lastDayOfMonth()).getMonth(),first.with(TemporalAdjusters.lastDayOfMonth()).getDayOfMonth(), 23, 59, 59);return new Date[]{Date.from(first.atZone(ZoneId.systemDefault()).toInstant()), Date.from(last.atZone(ZoneId.systemDefault()).toInstant())};
}