javaweb课程设计，简单商城前后台系统，基于mawen三个模块

package com.bagedate.shop.Servlet; import com.bagedate.shop.Service.shopService; import com.bagedate.shop.entity.Shop; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.Date; import java.util.List; @WebServlet("/backUpdateShopServlet") public class backUpdateShopServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Integer flag= Integer.parseInt(request.getParameter("flag")); Long shopId = Long.parseLong(request.getParameter("shopId")); Long categoryId=Long.parseLong(request.getParameter("categoryId")); if(flag==1){ Shop shop = new shopService().getOneShop(shopId); request.setAttribute("shop",shop); request.setAttribute("flag",flag); request.getRequestDispatcher("backUpdateShop.jsp").forward(request,response); }else if (flag==2){ new shopService().deleteById(shopId); List<Shop> shops = new shopService().selectShopsByCategoryId(categoryId); request.setAttribute("categoryId",categoryId); request.setAttribute("shops",shops); request.getRequestDispatcher("backMainShop.jsp").forward(request,response); }else if (flag==3){ }else if(flag==4){ request.getRequestDispatcher("backAddShop.jsp").forward(request,response); } } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Integer flag= Integer.parseInt(request.getParameter("flag")); if(flag==1){ Long categoryId = Long.parseLong(request.getParameter("categoryId")); Shop shop = new Shop(); shop.setShopId(Long.parseLong(request.getParameter("shopId"))); shop.setCategoryId(categoryId); shop.setName(request.getParameter("name")); shop.setLevel(Integer.parseInt(request.getParameter("level"))); shop.setPrice(Integer.parseInt(request.getParameter("price"))); shop.setIntroduce(request.getParameter("introduce")); shop.setSmallImg(request.getParameter("smallImg")); shop.setUpdateTime(new Date()); new shopService().updateShopById(shop); List<Shop> shops = new shopService().selectShopsByCategoryId(categoryId); request.setAttribute("categoryId",categoryId); request.setAttribute("shops",shops); request.getRequestDispatcher("backMainShop.jsp").forward(request,response); }else if(flag==2){ Long categoryId = Long.parseLong(request.getParameter("categoryId")); Shop shop = new Shop(); shop.setCategoryId(categoryId); shop.setName(request.getParameter("name")); shop.setLevel(Integer.parseInt(request.getParameter("level"))); shop.setPrice(Integer.parseInt(request.getParameter("price"))); shop.setIntroduce(request.getParameter("introduce")); shop.setSmallImg(request.getParameter("smallImg")); shop.setCreateTime(new Date()); shop.setUpdateTime(new Date()); new shopService().addShop(shop); List<Shop> shops = new shopService().selectShopsByCategoryId(categoryId); request.setAttribute("categoryId",categoryId); request.setAttribute("shops",shops); request.getRequestDispatcher("backMainShop.jsp").forward(request,response); } } }