List集合对象根据字段倒叙排序

订单展示时展示2中状态订单并按创建订单的时间倒叙排序

用java8性特性解决很简单

   orderDTO.setStatus(BaseConstant.NEW_ORDER);
        List<OrderDTO> orders=orderMapper.selectAll(orderDTO);
        orderDTO.setStatus(BaseConstant.NOT_ACCEPT_STATUS);
        List<OrderDTO> order=orderMapper.selectAll(orderDTO);
        order.addAll(orders);
        List<OrderDTO> collect = order.stream().sorted(Comparator.comparing(OrderDTO::getOrderTime).reversed()).collect(Collectors.toList());