public static Date getNextDay(Date date, int i) {
// 之后几天
Calendar cal=new GregorianCalendar();
cal.setTime(date);
cal.set(Calendar.DATE,cal.get(Calendar.DATE)+i);
return cal.getTime();
// 之前几天
Calendar cal=new GregorianCalendar();
cal.setTime(date);
cal.set(Calendar.DATE, cal.get(Calendar.DATE)-i);
return cal.getTime();
}
