利用joda（强大的Java日期操作组件）实现获取两个日期间隔

public static void main(String[] args) {
System.out.println(getDateTimeBetween(start.toDate(),end.toDate()));
}

/**
* 取两个日期间隔
*
* @param startDate
* @param endDate
* @return
*/
public static String getDateTimeBetween(Date startDate, Date endDate) {
DateTime start = new DateTime(startDate.getTime());
DateTime end = new DateTime(endDate.getTime());
Period period = new Period(start, end);
String result = period.getDays() + "天" + period.getHours() + "小时" + period.getMinutes() + "分" + period.getSeconds() + "秒";
return result;
}