概述
在完成了 实战SSM_O2O商铺_33【商品】商品编辑之Service层的实现之后，我们继续来实现Controller层的代码部分。
主要逻辑：
- 根据前端url中productId ,调用service层的接口获取product信息，以便前端能在商品编辑页面展示对应的数据
- 修改商品
ProductController
/**
*
*
* @Title: getProductById
*
* @Description: 因为只需要传入productId，使用@RequestParam注解。
* 同时也无需传入HttpServletRequest，用不到
*
* 根据页面原型，不仅要加载prodcut的信息，还需要加载对应的目录信息。
*
* @param productId
*
* @return: Map<String,Object>
*/
@RequestMapping(value = "/getproductbyid", method = RequestMethod.GET)
@ResponseBody
public Map<String, Object> getProductById(@RequestParam long productId) {
Map<String, Object> modelMap = new HashMap<String, Object>();
if (productId > -1) {
Product product = productService.queryProductById(productId);
List<ProductCategory> productCategoryList = productCategoryService.queryProductCategoryList(product.getShop().getShopId());
modelMap.put("product", product);
modelMap.put("productCategoryList", productCategoryList);
modelMap.put("success", true);
} else {
modelMap.put("success", false);
modelMap.put("errMsg", "empty pageSize or pageIndex or shopId");
}
return modelMap;
}
@RequestMapping(value = "/modifyproduct", method = RequestMethod.POST)
@ResponseBody
private Map<String, Object> modifyProduct(HttpServletRequest request) {
// 根据需求，页面中的下架按钮操作对应的标示符
boolean statusChange = HttpServletRequestUtil.getBoolean(request, "statusChange");
Map<String, Object> modelMap = new HashMap<String, Object>();
if (!statusChange && !VerifyCodeUtil.verifyCode(request)) {
modelMap.put("success", false);
modelMap.put("errMsg", "输入了错误的验证码");
return modelMap;
}
Product product = null;
// 接收前端传递过来的product
String productStr = null;
// 商品图片缩略图（输入流和名称的封装类）
ImageHolder thumbnail = null;
// 将HttpServletRequest转型为MultipartHttpServletRequest，可以很方便地得到文件名和文件内容
MultipartHttpServletRequest multipartHttpServletRequest = null;
// 接收商品缩略图
CommonsMultipartFile thumbnailFile = null;
// 接收商品详情图片
List<ImageHolder> productDetailImgList = new ArrayList<ImageHolder>();
// 创建一个通用的多部分解析器
CommonsMultipartResolver commonsMultipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
// Step2: 使用FastJson提供的api,实例化Product 构造调用service层的第一个参数
ObjectMapper mapper = new ObjectMapper();
// 获取前端传递过来的product,约定好使用productStr
try {
productStr = HttpServletRequestUtil.getString(request, "productStr");
product = mapper.readValue(productStr, Product.class);
} catch (Exception e) {
modelMap.put("success", false);
modelMap.put("errMsg", e.toString());
return modelMap;
}
// Step3: 商品缩略图 和 商品详情图 构造调用service层的第二个参数和第三个参数
try {
// 判断 request 是否有文件上传,即多部分请求
if (commonsMultipartResolver.isMultipart(request)) {
// 将request转换成多部分request
multipartHttpServletRequest = (MultipartHttpServletRequest) request;
// 得到缩略图的CommonsMultipartFile ,和前端约定好使用thumbnail 传递
// ，并构建ImageHolder对象
thumbnailFile = (CommonsMultipartFile) multipartHttpServletRequest.getFile("thumbnail");
// 转化为ImageHolder，使用service层的参数类型要求
thumbnail = new ImageHolder(thumbnailFile.getInputStream(), thumbnailFile.getOriginalFilename());
// 得到 商品详情的列表，和前端约定使用productImg + i 传递 ,并构建ImageHolder对象
for (int i = 0; i < IMAGEMAXCOUNT; i++) {
CommonsMultipartFile productDetailImgFile = (CommonsMultipartFile) multipartHttpServletRequest.getFile("productImg" + i);
if (productDetailImgFile != null) {
ImageHolder productDetailImg = new ImageHolder(productDetailImgFile.getInputStream(), productDetailImgFile.getOriginalFilename());
productDetailImgList.add(productDetailImg);
} else {
// 如果从请求中获取的到file为空，终止循环
break;
}
}
} else {
modelMap.put("success", false);
modelMap.put("errMsg", "上传图片不能为空");
return modelMap;
}
} catch (Exception e) {
modelMap.put("success", false);
modelMap.put("errMsg", e.toString());
return modelMap;
}
// Step4 调用Service层
if (product != null && thumbnailFile != null && productDetailImgList.size() > 0) {
try {
// 从session中获取shop信息，不依赖前端的传递更加安全
Shop currentShop = (Shop) request.getSession().getAttribute("currentShop");
product.setShop(currentShop);
// 调用addProduct
ProductExecution pe = productService.modifyProduct(product, thumbnail, productDetailImgList);
if (pe.getState() == ProductStateEnum.SUCCESS.getState()) {
modelMap.put("success", true);
} else {
modelMap.put("success", false);
modelMap.put("errMsg", pe.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;
}
单元测试
启动tomcat，我们对getProductById方法进行单元测试。modifyProduct方法待前端开发完成后一并测试。
根据路由规则访问
http://localhost:8080/o2o/shopadmin/getproductbyid?productId=7
{
"product": {
"productId": 7,
"productName": "offical_product",
"productDesc": "product offical desc",
"imgAddr": "\\upload\\item\\shopImage\\5\\2018070100324625530.jpg",
"normalPrice": "100",
"promotionPrice": "80",
"priority": 66,
"createTime": 1530286468000,
"lastEditTime": 1530419566000,
"enableStatus": 1,
"productImgList": [
{
"productImgId": 14,
"imgAddr": "\\upload\\item\\shopImage\\5\\2018070100324625530.jpg",
"imgDesc": null,
"priority": 66,
"createTime": 1530286468000,
"productId": 7
},
{
"productImgId": 15,
"imgAddr": "\\upload\\item\\shopImage\\5\\2018070100324625530.jpg",
"imgDesc": null,
"priority": 66,
"createTime": 1530286468000,
"productId": 7
}
],
"productCategory": {
"productCategoryId": 36,
"shopId": null,
"productCategoryName": null,
"productCategoryDesc": null,
"priority": null,
"createTime": null,
"lastEditTime": null
},
"shop": {
"shopId": 5,
"shopName": null,
"shopDesc": null,
"shopAddr": null,
"phone": null,
"shopImg": null,
"priority": null,
"createTime": null,
"lastEditTime": null,
"enableStatus": null,
"advice": null,
"owner": null,
"area": null,
"shopCategory": null
}
},
"productCategoryList": [
{
"productCategoryId": 36,
"shopId": 5,
"productCategoryName": "奶茶",
"productCategoryDesc": "香飘飘奶茶",
"priority": 99,
"createTime": 1529678397000,
"lastEditTime": 1529678397000
},
{
"productCategoryId": 37,
"shopId": 5,
"productCategoryName": "咖啡",
"productCategoryDesc": "拿铁咖啡",
"priority": 98,
"createTime": 1529678397000,
"lastEditTime": 1529678397000
}
],
"success": true
}检查数据是否符合预期。