Java 获取前一天的24小时

//获取凌晨时间
public static Date getTodayStartTime(){
    Calendar todayEnd = Calendar.getInstance();
    todayEnd.set(Calendar.HOUR_OF_DAY, 0);
    todayEnd.set(Calendar.MINUTE, 5);
    todayEnd.set(Calendar.SECOND, 0);
    todayEnd.set(Calendar.MILLISECOND, 0);
    return todayEnd.getTime();
}
//获取昨天半夜23:59:59
public static Date getYesterdayEnd(){
    Calendar todayEnd = Calendar.getInstance();
    todayEnd.set(Calendar.MINUTE, 59);
    todayEnd.set(Calendar.SECOND, 59);
    todayEnd.set(Calendar.MILLISECOND, 0);
    todayEnd.add(Calendar.DATE, -1);
    todayEnd.set(Calendar.HOUR_OF_DAY, 23);
    return todayEnd.getTime();
}
//获取某时刻过去的24小时
public static Date getOneDayBefore(Date dateEnd){
    Calendar date = Calendar.getInstance();
    date.setTime(dateEnd);
    date.set(Calendar.DATE, date.get(Calendar.DATE) - 1);
    return date.getTime();
}

强迫症，反对String字符串转来转去。