shop--9.商品--批量操作--添加（后端）
1.插入商品信息
Dao层
public int insertProduct(Product product);
<insert id="insertProduct" parameterType="com.shop.bean.Product" useGeneratedKeys="true"
keyProperty="productId" keyColumn="product_id">
INSERT INTO
product(product_name, product_desc, img_addr,
normal_price, promotion_price, priority, create_time,
last_edit_time, status, product_category_id, shop_id)
VALUES
(#{productName}, #{productDesc},
#{imgAddr}, #{normalPrice}, #{promotionPrice},
#{priority}, #{createTime}, #{lastEditTime}, #{status},
#{productCategory.productCategoryId}, #{shop.shopId})
</insert>
2.批量添加商品图片信息
Dao层
public int batchInsertProductImg(List<ProductImg> productImgList);
<insert id="batchInsertProductImg" parameterType="java.util.List">
INSERT INTO
product_img(img_addr, img_desc, priority, create_time, product_id)
VALUES
<foreach collection="list" item="productImg" index="index" separator=",">
(
#{productImg.imgAddr},
#{productImg.imgDesc},
#{productImg.priority},
#{productImg.createTime},
#{productImg.productId}
)
</foreach>
</insert>
Service层
/**
* 添加商品信息及图片处理
* @param product
* @param thumbnail
* @param productImgList
* @return
* @throws ProductOperationException
*/
ProductExecution addProduct(Product product,
CommonsMultipartFile thumbnail,
List<CommonsMultipartFile> productImgList) throws ProductOperationException;
impl
/**
* 1.处理缩略图，获取缩略图的相对路径并赋值给product中的imgAddr
* 2.往product中写入商品信息，获取productId
* 3.结合productId,批量处理商品详情图片
* 4.将商品详情图列表批量插入product_img中
* @param product
* @param thumbnail
* @param productImgList
* @return
* @throws ProductOperationException
*/
@Override
public ProductExecution addProduct(Product product, CommonsMultipartFile thumbnail, List<CommonsMultipartFile> productImgList)
throws ProductOperationException {
//空值判断
if(product != null && product.getShop() != null && product.getShop().getShopId() != null){
//给商品设置默认属性
product.setCreateTime( new Date() );
product.setLastEditTime( new Date( ) );
//设置商品状态，默认为上架
product.setStatus(1);
//设置商品的缩略图
if(thumbnail != null){
addThumbnail(product, thumbnail);
}
try{
//插入商品信息，获得商品Id
int productId = productDao.insertProduct( product );
if(productId <= 0){
throw new ProductOperationException("创建商品失败");
}
} catch(Exception e){
throw new ProductOperationException( "创建商品失败" + e.toString() );
}
if(productImgList != null && productImgList.size() > 0){
addProductImgList(product, productImgList);
}
return new ProductExecution( ProductStateEnum.SUCCESS, product);
} else{
return new ProductExecution(ProductStateEnum.EMPTY);
}
}
/**
* 将商品缩略图添加到用户相对的文件夹下，并将店铺信息中的商品图片信息更新
* @param product
* @param thumbnail
*/
public void addThumbnail(Product product, CommonsMultipartFile thumbnail){
//获取缩略图的存储途径，直接存储在店铺的文件夹下
String relativeImgPath = PathUtil.getShopImgPath(product.getShop().getShopId());
String realRelativeImgPath = ImageUtil.generateThumbnail(thumbnail, relativeImgPath);
product.setImgAddr( realRelativeImgPath );
}
/**
* 批量添加商品详情图片到用户相对的文件夹下，并将其批量插入到数据库中
* @param product
* @param productImgList
*/
public void addProductImgList(Product product, List<CommonsMultipartFile> productImgList){
//获取图片的存储途径，直接存储在店铺的文件夹下
String relativeImgPath = PathUtil.getShopImgPath( product.getShop().getShopId() );
List<ProductImg> productImgs = new ArrayList<>();
//遍历图片列表进行处理，并且将结果添加到productImgs中
for(CommonsMultipartFile proImg : productImgList){
String imgAddr = ImageUtil.generateNormalImg(proImg, relativeImgPath);
ProductImg productImg = new ProductImg();
productImg.setImgAddr( imgAddr );
productImg.setProductId(product.getProductId());
productImg.setCreateTime( new Date( ) );
productImgs.add( productImg );
}
if(productImgs.size() > 0){
try{
int effectNum = productImgDao.batchInsertProductImg( productImgs );
if(effectNum <= 0){
throw new ProductOperationException("创建商品详情图片失败");
}
} catch(Exception e){
throw new ProductOperationException("创建商品详情图片失败" + e.toString());
}
}
}
Controller层
将前端传回来的商品信息、缩略图、详情图添加到后台数据库中
@Controller
@RequestMapping("/shopadmin")
public class ProductManagementController {
@Autowired
ProductService productService;
//支持上传商品详情图的最大数量
private static final int MAXIMAGECOUNT = 6;
@RequestMapping(value="/addproduct", method= RequestMethod.POST)
@ResponseBody
private Map<String, Object> addProduct(HttpServletRequest request) throws IOException {
Map<String, Object> modelMap = new HashMap<>();
//验证码校验
if(!CodeUtil.checkVerifyCode(request)){
modelMap.put( "success", false );
modelMap.put( "errMsg", "验证码错误" );
return modelMap;
}
//接收前端参数变量的初始化，商品，缩略图，商品详情图片
//不懂
ObjectMapper objectMapper = new ObjectMapper();
Product product = null;
String productStr = HttpServletRequestUtil.getString(request, "productStr");
CommonsMultipartFile thumbnail = null;
List<CommonsMultipartFile> productImgList = new ArrayList<>( );
//在本次会话的上下文获取上传的文件
CommonsMultipartResolver commonsMultipartResolver =
new CommonsMultipartResolver( request.getSession().getServletContext() );
MultipartHttpServletRequest multipartHttpServletRequest = null;
try{
//如果上传的文件有值
if(commonsMultipartResolver.isMultipart( request )){
multipartHttpServletRequest = (MultipartHttpServletRequest) request;
thumbnail = (CommonsMultipartFile) multipartHttpServletRequest.getFile("thumbnail");
for(int i = 0; i < MAXIMAGECOUNT; i++){
CommonsMultipartFile commonsMultipartFile = (CommonsMultipartFile) multipartHttpServletRequest.getFile("productImg" + i);
if(commonsMultipartFile != null){
productImgList.add( commonsMultipartFile );
} else {
break;
}
}
} else{
modelMap.put( "success", false );
modelMap.put( "errMsg", "上传图片不能为空" );
}
} catch (Exception e){
modelMap.put( "success", false );
modelMap.put( "errMsg", e.toString() );
return modelMap;
}
try{
//尝试获取从前端传过来的表单String流，并借助ObjectMapper将其转化为Product实体类
product = objectMapper.readValue(productStr, Product.class);
} catch(Exception e){
modelMap.put( "success", false );
modelMap.put( "errMsg", e.toString() );
return modelMap;
}
//若product，thumbnail（缩略图），productImgList（商品详情图片列表）不为空，则进行商品添加
if(product != null && thumbnail != null && productImgList.size() > 0){
try{
//从session中获取当前shop的id赋值给product，减少对前端数据的依赖
/*Shop currentShop = (Shop) request.getSession().getAttribute( "currentShop" );
*/
Shop currentShop = new Shop();
currentShop.setShopId( 1L );
Shop shop = new Shop();
shop.setShopId(currentShop.getShopId());
product.setShop(shop);
//执行添加操作
ProductExecution productExecution = productService.addProduct( product, thumbnail, productImgList );
if(productExecution.getState() == ProductStateEnum.SUCCESS.getState()){
modelMap.put( "success", true );
}else{
modelMap.put( "success", false );
modelMap.put( "errMsg", productExecution.getStateInfo() );
}
} catch(ProductOperationException e){
modelMap.put( "success", false );
modelMap.put( "errMsg", e.toString() );
return modelMap;
}
}else{
modelMap.put( "success", false );
modelMap.put( "errMsg", "请输入商品信息" );
}
return modelMap;
}
}
