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（版本1）
publicstaticint getIntervalDays(Date fDate, Date oDate) {
if (null == fDate || null == oDate) {
return -1;
}
long intervalMilli = oDate.getTime() - fDate.getTime();
return (int) (intervalMilli / (24 * 60 * 60 * 1000));
}
（版本2）
publicstaticint daysOfTwo(Date fDate, Date oDate) { Calendar aCalendar = Calendar.getInstance(); aCalendar.setTime(fDate); int day1 = aCalendar.get(Calendar.DAY_OF_YEAR); aCalendar.setTime(oDate); int day2 = aCalendar.get(Calendar.DAY_OF_YEAR); return day2 - day1; }
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原文地址：http://www.cnblogs.com/Dylanblogs/p/4288384.html
