从数据库获取两个时间，并计算中间隔了多少时间

long nd = 1000 * 24 * 60 * 60;
long nh = 1000 * 60 * 60;
long nm = 1000 * 60;
long ns = 1000;
for (PhcUserbed phcUserbed:phcUserbedList){//将数据库获取的list一一计算
     PhcUserbedResponseDto responseDto=new PhcUserbedResponseDto();//定义的传参对象
     long time1=(phcUserbed.getEndTime().getTime()phcUserbed.getStartTime().getTime());//从数据库获取两个时间并计算他们的差值
     String time=(time1 / nd)+"天"+(time1 % nd / nh)+"时"+(time1% nd % nh / nm)+"分"+(time1% nd % nh % nm / ns)+"秒";
     responseDto.setUsedata(String.valueOf(time));///赋值
}