Java电商项目面试--商品模块

面试：商品模块技术要点
1、POJO、BO、VO抽象模型
2、高效分页及动态排序
3、FTP服务对接、富文本上传

一、商品模块功能
前台功能：
1、产品搜索
2、动态排序列表
3、商品详情
后台功能：
1、商品列表
2、商品搜索
3、图片上传
4、增加商品、更新商品、商品上下架
二、后台新增和更新商品
Controller：

@Controller
@RequestMapping("/manage/product")
public class ProductManageController {
   
   
@Autowired
private IUserService iUserService;
@Autowired
private IProductService iProductService;
@Autowired
private IFileService iFileService;

@RequestMapping("save.do")
@ResponseBody
public ServerResponse productSave(HttpSession session, Product product) {
    User user = (User) session.getAttribute(Const.CURRENT_USER);
    if (user == null) {
        return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(), "用户未登录,请登录管理员");
    }
    //如果是管理员
    if (iUserService.checkAdminRole(user).isSuccess()) {
        //增加或者更新商品
         return iProductService.saveOrUpdateProduct(product);
    } else {
        return ServerResponse.createByErrorMessage("无权限操作");
    }
}

Service层：

@Service("iProductService")
public class ProductServiceImpl implements IProductService {
   
   
    @Autowired
    private ProductMapper productMapper;
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private ICategoryService iCategoryService;

    //保存或者更新商品
    public ServerResponse saveOrUpdateProduct(Product product){
        if(product != null)  //产品不为空
        {
            // 获取前端传来的子图字符串用；分割~譬如前端传来1.jpg,2.jpg,3.jpg，
            // 然后第一块代码就是将这个字符串按照；来分割成字符串数组，就可以获得所有子图，
            // 然后把第一张子图当做主图来存储
            if(StringUtils.isNotBlank(product.getSubImages())){
                String[] subImageArray = product.getSubImages().split(",");
                if(subImageArray.length > 0)
                    product.setMainImage(subImageArray[0]);
            }
            //当产品id存在则更新商品
            if(product.getId() != null){
                int rowCount = productMapper.updateByPrimaryKey(product);
                if(rowCount > 0)
                    return ServerResponse.createBySuccess("更新产品成功");
                return ServerResponse.createBySuccess("更新产品失败");
            }
            //不存在则添加
            else
            {
                int rowCount = productMapper.insert(product);
                if(rowCount > 0)
                    return ServerResponse.createBySuccess("新增产品成功");
                return ServerResponse.createBySuccess("新增产品失败");
            }
        }
        return ServerResponse.createByErrorMessage("新增或更新产品参数不正确");
    }
}

三、后台新增和更新商品
Controller：

@RequestMapping("set_sale_status.do")
@ResponseBody
public ServerResponse setSaleStatus(HttpSession session, Integer productId,Integer status){
    User user = (User)session.getAttribute(Const.CURRENT_USER);
    if(user == null){
             return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(),"用户未登录,请登录管理员");
    }
    if(iUserService.checkAdminRole(user).isSuccess()){
            return iProductService.setSaleStatus(productId,status);
    }else{
            return ServerResponse.createByErrorMessage("无权限操作");
    }
}

Service：

public ServerResponse<String> setSaleStatus(Integer productId,Integer status){
    if(productId == null || status == null){
             return ServerResponse.createByErrorCodeMessage(ResponseCode.ILLEGAL_ARGUMENT.getCode(),ResponseCode.ILLEGAL_ARGUMENT.getDesc());
    }
    Product product = new Product();
    product.setId(productId);
    product.setStatus(status);
    int rowCount = productMapper.updateByPrimaryKeySelective(product);
    if(rowCount > 0){
            return ServerResponse.createBySuccess("修改产品销售状态成功");
    }
    return ServerResponse.createByErrorMessage("修改产品销售状态失败");
}

四、后台获取产品详情
Controller：

@RequestMapping("detail.do")
@ResponseBody
public ServerResponse getDetail(HttpSession session, Integer productId){
    User user = (User)session.getAttribute(Const.CURRENT_USER);
    if(user == null)
        return ServerResponse.createByErrorCodeMessage(ResponseCode.NEED_LOGIN.getCode(),"用户未登录,请登录管理员");
    if(iUserService.checkAdminRole(user).isSuccess()){
        return iProductService.manageProductDetail(productId);
    }else{
        return ServerResponse.createByErrorMessage("无权限操作");
    }
}

Service：

@Service("iProductService")
public class ProductServiceImpl implements IProductService {
   
   
      @Autowired
      private ProductMapper productMapper; 
      @Autowired
      private CategoryMapper categoryMapper;
      @Autowired
      private ICategoryService iCategoryService;

public ServerResponse<ProductDetailVo> manageProductDetail(Integer productId){
    if(productId == null){
        return ServerResponse.createByErrorCodeMessage(ResponseCode.ILLEGAL_ARGUMENT.getCode(),ResponseCode.ILLEGAL_ARGUMENT.getDesc());
    }
    Product product = productMapper.selectByPrimaryKey(productId);
    if(product == null)
        return ServerResponse.createByErrorMessage("产品已下架或者删除");
    //VO -- value object
    ProductDetailVo productDetailVo = assembleProductDetailVo(product);
    return ServerResponse.createBySuccess(productDetailVo);
}
private ProductDetailVo assembleProductDetailVo(Product product){
    ProductDetailVo productDetailVo = new ProductDetailVo();
    productDetailVo.setId(product.getId());
    productDetailVo.setSubtitle(product.getSubtitle());
    productDetailVo.setPrice(product.getPrice());
    productDetailVo.setMainImage(product.getMainImage());
    productDetailVo.setSubImages(product.getSubImages());
    productDetailVo.setCategoryId(product.getCategoryId());
    productDetailVo.setDetail(product.getDetail());
    productDetailVo.setName(product.getName());
    productDetailVo.setStatus(product.getStatus());
    productDetailVo.setStock(product.getStock());
    productDetailVo.setImage