int hyear = Integer.valueOf(calendarPo.getC_year());
int hmonth = Integer.valueOf(calendarPo.getC_month())-1; //月份从0开始
Calendar calendar = new GregorianCalendar(hyear, hmonth, 1);
int i = 1;
while (calendar.get(Calendar.MONTH) < hmonth + 1) {
calendar.set(Calendar.WEEK_OF_YEAR, i++);
calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
if (calendar.get(Calendar.MONTH) == hmonth) {
System.out.println("星期日：" + calendar.get(Calendar.DATE));
}
calendar.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);
if (calendar.get(Calendar.MONTH) == hmonth) {
System.out.printf("星期六：" + calendar.get(Calendar.DATE));
}
}