int weekday(int year, int month, int day){
Calendar cal = Calendar.getInstance();
//月份要减一,在西方周日是一周的第1天(日期也需要减一)
cal.set(year,month-1,day-1);
return cal.get(Calendar.DAY_OF_WEEK);
}

int weekday(int year, int month, int day){
Calendar cal = Calendar.getInstance();
//月份要减一,在西方周日是一周的第1天(日期也需要减一)
cal.set(year,month-1,day-1);
return cal.get(Calendar.DAY_OF_WEEK);
}