使用mybatisplus进行分页查询total总为0的原因

分页查询代码如下，数据能查询出来，但是分页的total总是为0。经过多次调试，发现查询的过程中没有进入分页拦截器（PaginationInterceptor），原来是容器中缺少了这个bean：

public PageResult<OrderVO> findOrderList(Integer page, Integer rows, Integer status) {
        //获取用户id
        Long userId = UserHolder.getUserId();

        //分页查询
        Order order = new Order();
        order.setUserId(userId);
        if (status != null){
            order.setStatus(status);
        }
        QueryWrapper<Order> wrapper = new QueryWrapper<>(order);
        IPage<Order> iPage = new Page<>(page,rows);
        iPage = orderMapper.selectPage(iPage, wrapper);

        //根据订单id查询订单详情列表
        List<Order> orderList = iPage.getRecords();

        List<OrderVO> list = new ArrayList<>();
        orderList.forEach(order2 -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(order2.getOrderId());
            Wrapper wrapper2 = Wrappers.query(orderDetail);
            List<OrderDetail> orderDetails = orderDetailMapper.selectList(wrapper2);
            OrderVO orderVO = BeanHelper.copyProperties(order2, OrderVO.class);
            orderVO.setDetailList(orderDetails);
            list.add(orderVO);
        });

        PageResult<OrderVO> pageResult = new PageResult<>(
                iPage.getTotal(),
                iPage.getPages(),
                list
        );
        return pageResult;
    }

解决办法：只需要在容器中添加这个bean就行了

public class LyOrderApplication {
    public static void main(String[] args) {
        SpringApplication.run(LyOrderApplication.class,args);
    }

    @Bean
    public PaginationInterceptor paginationInterceptor(){
        return new PaginationInterceptor();
    }
}