判断两个Date类型的时间是否大于6天

new Date().toInstant() 是获取当前时间，并转换成Instant对象

cardDeviceTrajectoryInfo.getGpstime().toInstant() 是表中最后一条数据的时间，并转换成Instant对象

// 计算两个时间的间隔
long daysBetween = ChronoUnit.DAYS.between(new Date().toInstant(), cardDeviceTrajectoryInfo.getGpstime().toInstant());

long daysBetweenAbs = Math.abs(daysBetween);

System.out.println(new Date());
System.out.println(cardDeviceTrajectoryInfo.getGpstime());
System.out.println(daysBetweenAbs);

// 判断间隔是否大于6天
if (daysBetweenAbs > 6) {
	System.out.println("两个时间间隔大于6天");
} else {
	System.out.println("两个时间间隔不大于6天");
}