java 判断两个时间段是否有交集

/* 开始时间 */
Date leftStartDate = feesPreferential.getPreferentialStartTime();
/* 结束时间 */
Date leftEndDate = feesPreferential.getPreferentialEndTime();

/*比较的时间段*/
Date rightStartDate = (Date) feesPreferentialList.get(i).get("preferentialStartTime");
Date rightEndDate = (Date) feesPreferentialList.get(i).get("preferentialEndTime");

/*判断*/
if (((leftStartDate.getTime() >= rightStartDate.getTime())
&& leftStartDate.getTime() < rightEndDate.getTime())
|| ((leftStartDate.getTime() > rightStartDate.getTime())
&& leftStartDate.getTime() <= rightEndDate.getTime())
|| ((rightStartDate.getTime() >= leftStartDate.getTime())
&& rightStartDate.getTime() < leftEndDate.getTime())
|| ((rightStartDate.getTime() > leftStartDate.getTime())
&& rightStartDate.getTime() <= leftEndDate.getTime())){
System.out.println("两段时间存在交集");
}
System.out.println("两段时间不存在交集");