mybatis-plus对表的查询方式

public Page<WmsInventoryVO> queryPage(WmsInventoryQuery query, Pageable page) {
        List<WmsInventory> list = selectList(query, page);
        List<WmsInventoryVO> res = inventoryConvert.dos2vos(list);
        injectAreaAndItemInfo(res);
        return new PageImpl<>(res, page, ((com.github.pagehelper.Page) list).getTotal());
    }

public void injectAreaAndItemInfo(List<? extends WmsAreaAndItemInfo> res) {
        if (CollUtil.isEmpty(res)) {
            return;
        }
        Set<String> itemIds = new HashSet<>();
        res.forEach(it -> {
            if (it.getItemId() != null) {
                itemIds.add(it.getItemId());
            }
        });
        Map<String, WmsItem> items = itemService.selectByIdIn(itemIds)
                .stream().collect(Collectors.toMap(WmsItem::getObjId, it -> it));

        res.forEach(it -> {
            if (it.getItemId() != null && items.containsKey(it.getItemId())) {
                WmsItem item = items.get(it.getItemId());
                it.setItemName(item.getItemName());
                it.setItemNo(item.getItemNo());
                it.setItemDelFlag(item.getDelFlag());
            }
        });
    }

public List<WmsItem> selectByIdIn(Collection<String> ids) {
		// 如果主键集合为空，直接返回空集合
		if (ids == null || ids.isEmpty()) {
			return new ArrayList<>();
		}
		QueryWrapper<WmsItem> qw = new QueryWrapper<>();
		qw.in("obj_id", ids);
		return itemMapper.selectList(qw);
}