6-3 店铺信息编辑之controller层的实现

目录

 

1、编写ShopManagementController 的getshopbyid

2、编写ShopManagementController 的modifyshop

3、registershop的session添加

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1、编写ShopManagementController 的getshopbyid

@RequestMapping(value="/getshopbyid",method=RequestMethod.GET)
	@ResponseBody
	private Map getShopById(HttpServletRequest request){
		Map modelMap = new HashMap();
		Long shopId = HttpServletRequestUtil.getLong(request, "shopId");//在将前台键位shopId的值传入
		if(shopId > -1) {
			try {
				Shop shop = shopService.getByShopId(shopId);
				List areaList = new ArrayList();
				modelMap.put("shop", shop);
				modelMap.put("areaList", areaList);
				modelMap.put("success", true);
			} catch (Exception e) {
				modelMap.put("success", false);
				modelMap.put("errMsg", e.toString());
			}
			
		} else {
			modelMap.put("success", false);
			modelMap.put("errMsg", "empty shopId");
		}
		return modelMap;
	}

测试

浏览器输入controller的路由，因为是GET方法，在shopId后传入参数1

http://localhost:8080/o2oDemo/shopadmin/getshopbyid?shopId=1

2、编写ShopManagementController 的modifyshop

@RequestMapping(value="modifyshop",method=RequestMethod.POST)
	@ResponseBody
	private Map modifyShop(HttpServletRequest request){
		Map modelMap = new HashMap();
		//将验证码工具引入
		if(!CodeUtil.checkVerifyCode(request)) {
			modelMap.put("success", false);
			modelMap.put("errMsg", "输入了错误的验证码");
			return modelMap;
		}
		//1、接收并转化响应的参数，包括店铺信息及图片信息
		String shopStr = HttpServletRequestUtil.getString(request, "shopStr");
		ObjectMapper mapper = new ObjectMapper();//用于Java对象与JSON的互换
		Shop shop = null;
		try {
			shop = mapper.readValue(shopStr, Shop.class);//转换成shop实体类
		} catch(Exception e){
			modelMap.put("success", false);
			modelMap.put("errMsg", e.getMessage());
			return modelMap;
		}
		/**
		 * 以下处理图片相关逻辑
		 */
		CommonsMultipartFile shopImg = null;
		CommonsMultipartResolver commonsMultipartResolver  = new CommonsMultipartResolver(
				request.getSession().getServletContext());//从request会话中的上下文获取相关文件上传的内容
		//判断是否有上传的文件流
		if(commonsMultipartResolver.isMultipart(request)) {
			//将request转换成MultipartHttpServletRequest对象
			MultipartHttpServletRequest multipartHttpServletRequest = (MultipartHttpServletRequest)request;
			shopImg = (CommonsMultipartFile)multipartHttpServletRequest.getFile("shopImg");//shopImg是前端约定好的变量中传来的
		}
		//2、修改店铺信息
		if(shop!=null&&shop.getShopId()!=null) {
			ShopExecution se;
			try {
				if(shopImg == null) {
					//图片为空，传入null，不修改图片
					se = shopService.modifyShop(shop,null,null);
				} else {
					se = shopService.modifyShop(shop,shopImg.getInputStream(),shopImg.getOriginalFilename());
				}
				
				if(se.getState() == ShopStateEnum.SUCCESS.getState()) {
					modelMap.put("success", true);
				} else {
					modelMap.put("success", false);
					modelMap.put("errMsg", se.getStateInfo());
				}
			} catch (ShopOperationException e) {
				modelMap.put("success", false);
				modelMap.put("error", e.getMessage());
			} catch (IOException e) {
				modelMap.put("success", false);
				modelMap.put("error", e.getMessage());
			}
			return modelMap;
		}else {
			modelMap.put("success", false);
			modelMap.put("errMsg", "请输入店铺Id");
			return modelMap;
		}
	}

3、registershop的session添加

session的作用：

 服务器可以为浏览器创建一个会话对象，在需要保存用户数据时，服务器可以把用户信息写到用户独占的session中，当用户使用浏览区访问服务器时，服务器可以从用户session中取出用户数据。服务器创建session后，会把session的id以cookie的形式回写给客户机，因此只要客户端浏览器不关闭，再去访问服务器时都会带着session的id，服务器发现该id后，会使用与之对应的内容进行服务。session有过期时间，Tomcat默认是30min，即30min不操作就会过期

 

获取session

request.getSession().getAttribute();