判断是否为同一天

private static boolean isSameDate(Date date1, Date date2) {
Calendar cal1 = Calendar.getInstance();
cal1.setTime(date1);
Calendar cal2 = Calendar.getInstance();
cal2.setTime(date2);
boolean isSameYear = cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR);
boolean isSameMonth = isSameYear && cal1.get(Calendar.MONTH) == cal2.get(Calendar.MONTH);
boolean isSameDate = isSameMonth && cal1.get(Calendar.DAY_OF_MONTH) == cal2.get(Calendar.DAY_OF_MONTH);
return isSameDate;
}