final ZonedDateTime now = ZonedDateTime.now(); //当前时间
final ZonedDateTime todayZero = now.truncatedTo(ChronoUnit.DAYS); //今天的0点
final ZonedDateTime tomorrowZero = todayZero.plusDays(1); //明天的0点
final ZonedDateTime firstDayOfMonth = todayZero.withDayOfMonth(1); //当月1号0点
final ZonedDateTime nextDayOfMonth = firstDayOfMonth.plusMonths(1);//下月1号0点
final Date from = Date.from(todayZero.toInstant()); //ZoneDateTime 转换成Date