下面是登陆页面

 登陆后进入首页，可以看到公告信息，还有库存预警信息

客户管理页面

商品管理页面

 供应商管理

 如果库存不够，需要进货

查看退货信息

销售商品查看

部门管理

菜单管理

 系统公告

部分代码：

商品维护

 /**
     * 查询商品
     * @param goodsVo
     * @return
     */
    @RequestMapping("loadAllGoods")
    public DataGridView loadAllGoods(GoodsVo goodsVo){
        IPage<Goods> page = new Page<Goods>(goodsVo.getPage(),goodsVo.getLimit());
        QueryWrapper<Goods> queryWrapper = new QueryWrapper<Goods>();
        queryWrapper.eq(goodsVo.getProviderid()!=null&&goodsVo.getProviderid()!=0,"providerid",goodsVo.getProviderid());
        queryWrapper.like(StringUtils.isNotBlank(goodsVo.getGoodsname()),"goodsname",goodsVo.getGoodsname());
        queryWrapper.like(StringUtils.isNotBlank(goodsVo.getProductcode()),"productcode",goodsVo.getProductcode());
        queryWrapper.like(StringUtils.isNotBlank(goodsVo.getPromitcode()),"promitcode",goodsVo.getPromitcode());
        queryWrapper.like(StringUtils.isNotBlank(goodsVo.getDescription()),"description",goodsVo.getDescription());
        queryWrapper.like(StringUtils.isNotBlank(goodsVo.getSize()),"size",goodsVo.getSize());

        queryWrapper.orderByDesc("id");
        goodsService.page(page,queryWrapper);
        List<Goods> records = page.getRecords();
        for (Goods goods : records) {
            Provider provider = providerService.getById(goods.getProviderid());
            if (null!=provider){
                goods.setProvidername(provider.getProvidername());
            }
        }
        return new DataGridView(page.getTotal(),page.getRecords());
    }

    /**
     * 添加商品
     * @param goodsVo
     * @return
     */
    @RequestMapping("addGoods")
    public ResultObj addGoods(GoodsVo goodsVo){
        try {
            System.out.println("====================================");
            System.out.println(goodsVo.getGoodsimg());
            if (goodsVo.getGoodsimg()!=null&&goodsVo.getGoodsimg().endsWith("_temp")){
                String newName = AppFileUtils.renameFile(goodsVo.getGoodsimg());
                goodsVo.setGoodsimg(newName);
            }
            goodsService.save(goodsVo);
            return ResultObj.ADD_SUCCESS;
        } catch (Exception e) {
            e.printStackTrace();
            return ResultObj.ADD_ERROR;
        }
    }

    /**
     * 修改商品
     * @param goodsVo
     * @return
     */
    @RequestMapping("updateGoods")
    public ResultObj updateGoods(GoodsVo goodsVo){
        try {
            //商品图片不是默认图片
            if (!(goodsVo.getGoodsimg()!=null&&goodsVo.getGoodsimg().equals(Constast.DEFAULT_IMG_GOODS))){

                if (goodsVo.getGoodsimg().endsWith("_temp")){
                    String newName = AppFileUtils.renameFile(goodsVo.getGoodsimg());
                    goodsVo.setGoodsimg(newName);
                    //删除原先的图片
                    String oldPath = goodsService.getById(goodsVo.getId()).getGoodsimg();
                    AppFileUtils.removeFileByPath(oldPath);
                }
            }
            goodsService.updateById(goodsVo);
            return ResultObj.UPDATE_SUCCESS;
        } catch (Exception e) {
            e.printStackTrace();
            return ResultObj.UPDATE_ERROR;
        }
    }

    /**
     * 删除商品
     * @param id 商品id
     * @return
     */
    @RequestMapping("deleteGoods")
    public ResultObj deleteGoods(Integer id,String goodsimg){
        try {
            //删除商品的图片
            AppFileUtils.removeFileByPath(goodsimg);
//            goodsService.removeById(id);
            goodsService.deleteGoodsById(id);
            return ResultObj.DELETE_SUCCESS;
        } catch (Exception e) {
            e.printStackTrace();
            return ResultObj.DELETE_ERROR;
        }
    }

    /**
     * 加载所有可用的商品
     * @return
     */
    @RequestMapping("loadAllGoodsForSelect")
    public DataGridView loadAllGoodsForSelect(){
        QueryWrapper<Goods> queryWrapper = new QueryWrapper<Goods>();
        queryWrapper.eq("available",Constast.AVAILABLE_TRUE);
        List<Goods> list = goodsService.list(queryWrapper);
        for (Goods goods : list) {
            Provider provider = providerService.getById(goods.getProviderid());
            if (null!=provider){
                goods.setProvidername(provider.getProvidername());
            }
        }
        return new DataGridView(list);
    }

    /**
     * 根据供应商ID查询商品信息
     * @param providerid    供应商ID
     * @return
     */
    @RequestMapping("loadGoodsByProviderId")
    public DataGridView loadGoodsByProviderId(Integer providerid){
        QueryWrapper<Goods> queryWrapper = new QueryWrapper<Goods>();
        queryWrapper.eq("available",Constast.AVAILABLE_TRUE);
        queryWrapper.eq(providerid!=null,"providerid",providerid);
        List<Goods> list = goodsService.list(queryWrapper);
        for (Goods goods : list) {
            Provider provider = providerService.getById(goods.getProviderid());
            if (null!=provider){
                goods.setProvidername(provider.getProvidername());
            }
        }
        return new DataGridView(list);
    }

    @RequestMapping("loadAllWarningGoods")
    public DataGridView loadAllWarningGoods(){
        List<Goods> goods = goodsService.loadAllWarning();
        return new DataGridView((long) goods.size(),goods);
    }

以上就是部分功能展示，从整体上来看，本系统功能是十分完整的，界面设计简洁大方，交互友好，数据库设计也很合理，规模适中，代码工整，清晰，适合学习使用。

好了，今天就到这儿吧，小伙伴们点赞、收藏、评论，一键三连走起呀，下期见~~