计算两个日期间相隔了多少周，只要隔了周日就算一周
/**
* 计算两个日期间相隔的周数
*
* @param startDate
* 开始日期
* @param endDate
* 结束日期
* @return
*/
public static int computeWeek(Date startDate, Date endDate) {
int weeks = 0;
Calendar beginCalendar = Calendar.getInstance();
beginCalendar.setTime(startDate);
Calendar endCalendar = Calendar.getInstance();
endCalendar.setTime(endDate);
while (beginCalendar.before(endCalendar)) {
// 如果开始日期和结束日期在同年、同月且当前月的同一周时结束循环
if (beginCalendar.get(Calendar.YEAR) == endCalendar
.get(Calendar.YEAR)
&& beginCalendar.get(Calendar.MONTH) == endCalendar
.get(Calendar.MONTH)
&& beginCalendar.get(Calendar.DAY_OF_WEEK_IN_MONTH) == endCalendar
.get(Calendar.DAY_OF_WEEK_IN_MONTH)) {
break;
} else {
beginCalendar.add(Calendar.DAY_OF_YEAR, 7);
weeks += 1;
}
}
return weeks;
}