easybuy易买网，北大青鸟s2结业项目

package cn.easybuy.web.backend; import java.io.IOException; import java.io.PrintWriter; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import cn.easybuy.entity.Product_category; import cn.easybuy.service.product.Product_CategoryService; import cn.easybuy.service.product.Product_CategoryServiceImpl; import cn.easybuy.utils.CategoryPage; public class CategoryListServlet extends HttpServlet { public CategoryListServlet() { super(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String action = request.getParameter("action"); response.setContentType("text/html;charset=utf-8"); request.setCharacterEncoding("utf-8"); PrintWriter out = response.getWriter(); if(action.equals("pageShow")){ Product_CategoryService pcs = new Product_CategoryServiceImpl(); CategoryPage page = new CategoryPage(); String pageNo = request.getParameter("pageNo"); //如果页号为空 则给个初始值为1 代表首次初始化页面 if(pageNo==null){ pageNo="1"; } //设置当前页面号 page.setPageNo(Integer.parseInt(pageNo)); //设置每页条数 String pageSize = "5"; page.setPageSize(Integer.parseInt(pageSize)); //获取总数 int DataCount = pcs.getCount(); //设置总数 page.setDataNum(DataCount); //设置当前集合对象 page.setList(pcs.getCategoryList(Integer.parseInt(pageNo), Integer.parseInt(pageSize))); //将分页对象page设置到作用域中 request.setAttribute("page", page); //将全部分类设置到作用域中，使用page.list.parseID == CatagoryList.get(0).ID 来展示父ID request.setAttribute("CatagoryList", pcs.getList()); //转发到分类列表页面按照分页展示 request.getRequestDispatcher("Member_CategoryList.jsp").forward(request, response); }else if(action.equals("del")){ String id = request.getParameter("id"); Product_CategoryService pcs = new Product_CategoryServiceImpl(); int i = pcs.delCategorys(id); System.out.println(i); if(i==-1){ out.print("<script>"); out.print("alert('该分类下存在子分类，无法删除');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); }else if(i==-2){ out.print("<script>"); out.print("alert('该分类下存在商品，无法删除!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); }else if(i>0){ out.print("<script>"); out.print("alert('删除成功!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); }else{ out.print("<script>"); out.print("alert('删除失败!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); } }else if(action.equals("forward")){ //新增分类 控制页面转发 类型集合赋值作用域中 新增分类可以取出分类进行选择 Product_CategoryService pcs = new Product_CategoryServiceImpl(); List<List<Product_category>> pcList=pcs.getList(); String ToPage = request.getParameter("ToPage"); if(ToPage.equals("ToAdd1")){ request.getRequestDispatcher("Member_UpdateCategory1.jsp").forward(request, response); }else if(ToPage.equals("ToAdd2")){ request.setAttribute("pcList", pcList); request.getRequestDispatcher("Member_UpdateCategory2.jsp").forward(request, response); }else if(ToPage.equals("ToAdd3")){ request.setAttribute("pcList", pcList); request.getRequestDispatcher("Member_UpdateCategory3.jsp").forward(request, response); } }else if(action.equals("update")){ Product_CategoryService pcs = new Product_CategoryServiceImpl(); String id = request.getParameter("id"); Product_category pc = pcs.getProductCategoryById(id); List<List<Product_category>> pcList=pcs.getList(); request.setAttribute("productCategory", pc); if(pc.getType()==1){ //执行修改一级分类 request.getRequestDispatcher("Member_UpdateCategory1.jsp").forward(request, response); }else if(pc.getType()==2){ //执行修改二级分类 //将集合存request作用域中 request.setAttribute("pcList", pcList); request.getRequestDispatcher("Member_UpdateCategory2.jsp").forward(request, response); }else if(pc.getType()==3){ //执行修改三级分类 //将集合存request作用域中 request.setAttribute("pcList", pcList); request.getRequestDispatcher("Member_UpdateCategory3.jsp").forward(request, response); } }else if(action.equals("add1")){ String id = request.getParameter("id"); //id等于0代表新增，数据库中自增列从1开始 if(Integer.parseInt(id.trim())==0){ //获取值(一级分类只需要名称 父分类为0 类型为1) String name = request.getParameter("name"); //封装对象 Product_category pc=new Product_category(); pc.setName(name); pc.setParentId(0); pc.setType(1); //创建业务逻辑层对象 调用新增方法 Product_CategoryService pcs = new Product_CategoryServiceImpl(); int i = pcs.addCategory(pc); if(i>0){ out.print("<script>"); out.print("alert('新增成功!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); }else{ out.print("<script>"); out.print("alert('新增成功!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); } }else{ //ID不等于0代表修改 //获取值 String name = request.getParameter("name"); //分装分类对象 Product_category pc = new Product_category(); pc.setId(Integer.parseInt(id.trim())); pc.setName(name); pc.setParentId(0); pc.setType(1); Product_CategoryService pcs = new Product_CategoryServiceImpl(); int i = pcs.updateCategory(pc); if(i>0){ out.print("<script>"); out.print("alert('修改成功!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); }else{ out.print("<script>"); out.print("alert('修改失败!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); } } }else if(action.equals("add2")){ String id = request.getParameter("id"); //id等于0代表新增，数据库中自增列从1开始 if(Integer.parseInt(id.trim())==0){ //获取值(二级分类需要名称，父分类ID 类型为2) String name = request.getParameter("name"); //封装对象 Product_category pc=new Product_category(); pc.setName(name); pc.setParentId(Integer.parseInt(request.getParameter("categoryLevel1Id"))); pc.setType(2); //创建业务逻辑层对象 调用新增方法 Product_CategoryService pcs = new Product_CategoryServiceImpl(); int i = pcs.addCategory(pc); if(i>0){ out.print("<script>"); out.print("alert('新增成功!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); }else{ out.print("<script>"); out.print("alert('新增成功!');"); out.print("window.location.href='CategoryListServlet?action=pageShow';"); out.print("</script>"); } }else{ //ID不等于0代表修改 //获取值 String name = request.getParameter("name"); //分装分类