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步骤 1 : 先运行,看到效果,再学习   
步骤 2 : 模仿和排错   
步骤 3 : 购物车页面操作   
步骤 4 : 调整订单数量   
步骤 5 : 删除订单项   
步骤 6 : 提交到结算页面   

步骤 1 :

先运行,看到效果,再学习

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完整的J2EE模仿天猫项目,使用J2SE、前端技术(包含所有前端jsp文件)、J2EE一整套技术栈, 从无到有涵盖全部147个知识点,475个开发步骤, 充实J2EE项目经验,为简历加上一个有吸引力的砝码.
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完整的J2EE模仿天猫项目,使用J2SE、前端技术(包含所有前端jsp文件)、J2EE一整套技术栈, 从无到有涵盖全部147个知识点,475个开发步骤, 充实J2EE项目经验,为简历加上一个有吸引力的砝码.
增值内容,点击购买
使用爬虫已经被系统记录,请勿使用爬虫,增大封号风险。 如果是误封 ,请联系站长,谢谢
步骤 3 :

购物车页面操作

edit
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完整的J2EE模仿天猫项目,使用J2SE、前端技术(包含所有前端jsp文件)、J2EE一整套技术栈, 从无到有涵盖全部147个知识点,475个开发步骤, 充实J2EE项目经验,为简历加上一个有吸引力的砝码.
增值内容,点击购买
使用爬虫已经被系统记录,请勿使用爬虫,增大封号风险。 如果是误封 ,请联系站长,谢谢
购物车页面操作
步骤 4 :

调整订单数量

edit
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完整的J2EE模仿天猫项目,使用J2SE、前端技术(包含所有前端jsp文件)、J2EE一整套技术栈, 从无到有涵盖全部147个知识点,475个开发步骤, 充实J2EE项目经验,为简历加上一个有吸引力的砝码.
增值内容,点击购买
使用爬虫已经被系统记录,请勿使用爬虫,增大封号风险。 如果是误封 ,请联系站长,谢谢
调整订单数量
var page = "forechangeOrderItem"; $.post( page, {"pid":pid,"number":num}, function(result){ if("success"!=result){ location.href="login.jsp"; } } );
public String changeOrderItem(HttpServletRequest request, HttpServletResponse response, Page page) { User user =(User) request.getSession().getAttribute("user"); if(null==user) return "%fail"; int pid = Integer.parseInt(request.getParameter("pid")); int number = Integer.parseInt(request.getParameter("number")); List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); for (OrderItem oi : ois) { if(oi.getProduct().getId()==pid){ oi.setNumber(number); orderItemDAO.update(oi); break; } } return "%success"; }
package tmall.servlet; import java.io.BufferedWriter; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Collections; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.util.HtmlUtils; import tmall.bean.Category; import tmall.bean.OrderItem; import tmall.bean.Product; import tmall.bean.ProductImage; import tmall.bean.PropertyValue; import tmall.bean.Review; import tmall.bean.User; import tmall.comparator.ProductAllComparator; import tmall.comparator.ProductDateComparator; import tmall.comparator.ProductPriceComparator; import tmall.comparator.ProductReviewComparator; import tmall.comparator.ProductSaleCountComparator; import tmall.dao.CategoryDAO; import tmall.dao.ProductDAO; import tmall.dao.ProductImageDAO; import tmall.util.Page; public class ForeServlet extends BaseForeServlet { public String home(HttpServletRequest request, HttpServletResponse response, Page page) { List<Category> cs= new CategoryDAO().list(); new ProductDAO().fill(cs); new ProductDAO().fillByRow(cs); request.setAttribute("cs", cs); return "home.jsp"; } public String register(HttpServletRequest request, HttpServletResponse response, Page page) { String name = request.getParameter("name"); String password = request.getParameter("password"); name = HtmlUtils.htmlEscape(name); System.out.println(name); boolean exist = userDAO.isExist(name); if(exist){ request.setAttribute("msg", "用户名已经被使用,不能使用"); return "register.jsp"; } User user = new User(); user.setName(name); user.setPassword(password); System.out.println(user.getName()); System.out.println(user.getPassword()); userDAO.add(user); return "@registerSuccess.jsp"; } public String login(HttpServletRequest request, HttpServletResponse response, Page page) { String name = request.getParameter("name"); name = HtmlUtils.htmlEscape(name); String password = request.getParameter("password"); User user = userDAO.get(name,password); if(null==user){ request.setAttribute("msg", "账号密码错误"); return "login.jsp"; } request.getSession().setAttribute("user", user); return "@forehome"; } public String product(HttpServletRequest request, HttpServletResponse response, Page page) { int pid = Integer.parseInt(request.getParameter("pid")); Product p = productDAO.get(pid); List<ProductImage> productSingleImages = productImageDAO.list(p, ProductImageDAO.type_single); List<ProductImage> productDetailImages = productImageDAO.list(p, ProductImageDAO.type_detail); p.setProductSingleImages(productSingleImages); p.setProductDetailImages(productDetailImages); List<PropertyValue> pvs = propertyValueDAO.list(p.getId()); List<Review> reviews = reviewDAO.list(p.getId()); productDAO.setSaleAndReviewNumber(p); request.setAttribute("reviews", reviews); request.setAttribute("p", p); request.setAttribute("pvs", pvs); return "product.jsp"; } public String logout(HttpServletRequest request, HttpServletResponse response, Page page) { request.getSession().removeAttribute("user"); return "@forehome"; } public String checkLogin(HttpServletRequest request, HttpServletResponse response, Page page) { User user =(User) request.getSession().getAttribute("user"); if(null!=user) return "%success"; return "%fail"; } public String loginAjax(HttpServletRequest request, HttpServletResponse response, Page page) { String name = request.getParameter("name"); String password = request.getParameter("password"); User user = userDAO.get(name,password); if(null==user){ return "%fail"; } request.getSession().setAttribute("user", user); return "%success"; } public String category(HttpServletRequest request, HttpServletResponse response, Page page) { int cid = Integer.parseInt(request.getParameter("cid")); Category c = new CategoryDAO().get(cid); new ProductDAO().fill(c); new ProductDAO().setSaleAndReviewNumber(c.getProducts()); String sort = request.getParameter("sort"); if(null!=sort){ switch(sort){ case "review": Collections.sort(c.getProducts(),new ProductReviewComparator()); break; case "date" : Collections.sort(c.getProducts(),new ProductDateComparator()); break; case "saleCount" : Collections.sort(c.getProducts(),new ProductSaleCountComparator()); break; case "price": Collections.sort(c.getProducts(),new ProductPriceComparator()); break; case "all": Collections.sort(c.getProducts(),new ProductAllComparator()); break; } } request.setAttribute("c", c); return "category.jsp"; } public String search(HttpServletRequest request, HttpServletResponse response, Page page){ String keyword = request.getParameter("keyword"); List<Product> ps= new ProductDAO().search(keyword,0,20); productDAO.setSaleAndReviewNumber(ps); request.setAttribute("ps",ps); return "searchResult.jsp"; } public String buyone(HttpServletRequest request, HttpServletResponse response, Page page) { int pid = Integer.parseInt(request.getParameter("pid")); int num = Integer.parseInt(request.getParameter("num")); Product p = productDAO.get(pid); int oiid = 0; User user =(User) request.getSession().getAttribute("user"); boolean found = false; List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); for (OrderItem oi : ois) { if(oi.getProduct().getId()==p.getId()){ oi.setNumber(oi.getNumber()+num); orderItemDAO.update(oi); found = true; oiid = oi.getId(); break; } } if(!found){ OrderItem oi = new OrderItem(); oi.setUser(user); oi.setNumber(num); oi.setProduct(p); orderItemDAO.add(oi); oiid = oi.getId(); } return "@forebuy?oiid="+oiid; } public String buy(HttpServletRequest request, HttpServletResponse response, Page page){ String[] oiids=request.getParameterValues("oiid"); List<OrderItem> ois = new ArrayList<>(); float total = 0; for (String strid : oiids) { int oiid = Integer.parseInt(strid); OrderItem oi= orderItemDAO.get(oiid); total +=oi.getProduct().getPromotePrice()*oi.getNumber(); ois.add(oi); } request.getSession().setAttribute("ois", ois); request.setAttribute("total", total); return "buy.jsp"; } public String addCart(HttpServletRequest request, HttpServletResponse response, Page page) { int pid = Integer.parseInt(request.getParameter("pid")); Product p = productDAO.get(pid); int num = Integer.parseInt(request.getParameter("num")); User user =(User) request.getSession().getAttribute("user"); boolean found = false; List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); for (OrderItem oi : ois) { if(oi.getProduct().getId()==p.getId()){ oi.setNumber(oi.getNumber()+num); orderItemDAO.update(oi); found = true; break; } } if(!found){ OrderItem oi = new OrderItem(); oi.setUser(user); oi.setNumber(num); oi.setProduct(p); orderItemDAO.add(oi); } return "%success"; } public String cart(HttpServletRequest request, HttpServletResponse response, Page page) { User user =(User) request.getSession().getAttribute("user"); List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); request.setAttribute("ois", ois); return "cart.jsp"; } public String changeOrderItem(HttpServletRequest request, HttpServletResponse response, Page page) { User user =(User) request.getSession().getAttribute("user"); if(null==user) return "%fail"; int pid = Integer.parseInt(request.getParameter("pid")); int number = Integer.parseInt(request.getParameter("number")); List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); for (OrderItem oi : ois) { if(oi.getProduct().getId()==pid){ oi.setNumber(number); orderItemDAO.update(oi); break; } } return "%success"; } }
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完整的J2EE模仿天猫项目,使用J2SE、前端技术(包含所有前端jsp文件)、J2EE一整套技术栈, 从无到有涵盖全部147个知识点,475个开发步骤, 充实J2EE项目经验,为简历加上一个有吸引力的砝码.
增值内容,点击购买
使用爬虫已经被系统记录,请勿使用爬虫,增大封号风险。 如果是误封 ,请联系站长,谢谢
删除订单项
var page="foredeleteOrderItem"; $.post( page, {"oiid":deleteOrderItemid}, function(result){ if("success"==result){ $("tr.cartProductItemTR[oiid="+deleteOrderItemid+"]").hide(); } else{ location.href="login.jsp"; } } );
public String deleteOrderItem(HttpServletRequest request, HttpServletResponse response, Page page){ User user =(User) request.getSession().getAttribute("user"); if(null==user) return "%fail"; int oiid = Integer.parseInt(request.getParameter("oiid")); orderItemDAO.delete(oiid); return "%success"; }
package tmall.servlet; import java.io.BufferedWriter; import java.io.PrintWriter; import java.util.ArrayList; import java.util.Collections; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.web.util.HtmlUtils; import tmall.bean.Category; import tmall.bean.OrderItem; import tmall.bean.Product; import tmall.bean.ProductImage; import tmall.bean.PropertyValue; import tmall.bean.Review; import tmall.bean.User; import tmall.comparator.ProductAllComparator; import tmall.comparator.ProductDateComparator; import tmall.comparator.ProductPriceComparator; import tmall.comparator.ProductReviewComparator; import tmall.comparator.ProductSaleCountComparator; import tmall.dao.CategoryDAO; import tmall.dao.ProductDAO; import tmall.dao.ProductImageDAO; import tmall.util.Page; public class ForeServlet extends BaseForeServlet { public String home(HttpServletRequest request, HttpServletResponse response, Page page) { List<Category> cs= new CategoryDAO().list(); new ProductDAO().fill(cs); new ProductDAO().fillByRow(cs); request.setAttribute("cs", cs); return "home.jsp"; } public String register(HttpServletRequest request, HttpServletResponse response, Page page) { String name = request.getParameter("name"); String password = request.getParameter("password"); name = HtmlUtils.htmlEscape(name); System.out.println(name); boolean exist = userDAO.isExist(name); if(exist){ request.setAttribute("msg", "用户名已经被使用,不能使用"); return "register.jsp"; } User user = new User(); user.setName(name); user.setPassword(password); System.out.println(user.getName()); System.out.println(user.getPassword()); userDAO.add(user); return "@registerSuccess.jsp"; } public String login(HttpServletRequest request, HttpServletResponse response, Page page) { String name = request.getParameter("name"); name = HtmlUtils.htmlEscape(name); String password = request.getParameter("password"); User user = userDAO.get(name,password); if(null==user){ request.setAttribute("msg", "账号密码错误"); return "login.jsp"; } request.getSession().setAttribute("user", user); return "@forehome"; } public String product(HttpServletRequest request, HttpServletResponse response, Page page) { int pid = Integer.parseInt(request.getParameter("pid")); Product p = productDAO.get(pid); List<ProductImage> productSingleImages = productImageDAO.list(p, ProductImageDAO.type_single); List<ProductImage> productDetailImages = productImageDAO.list(p, ProductImageDAO.type_detail); p.setProductSingleImages(productSingleImages); p.setProductDetailImages(productDetailImages); List<PropertyValue> pvs = propertyValueDAO.list(p.getId()); List<Review> reviews = reviewDAO.list(p.getId()); productDAO.setSaleAndReviewNumber(p); request.setAttribute("reviews", reviews); request.setAttribute("p", p); request.setAttribute("pvs", pvs); return "product.jsp"; } public String logout(HttpServletRequest request, HttpServletResponse response, Page page) { request.getSession().removeAttribute("user"); return "@forehome"; } public String checkLogin(HttpServletRequest request, HttpServletResponse response, Page page) { User user =(User) request.getSession().getAttribute("user"); if(null!=user) return "%success"; return "%fail"; } public String loginAjax(HttpServletRequest request, HttpServletResponse response, Page page) { String name = request.getParameter("name"); String password = request.getParameter("password"); User user = userDAO.get(name,password); if(null==user){ return "%fail"; } request.getSession().setAttribute("user", user); return "%success"; } public String category(HttpServletRequest request, HttpServletResponse response, Page page) { int cid = Integer.parseInt(request.getParameter("cid")); Category c = new CategoryDAO().get(cid); new ProductDAO().fill(c); new ProductDAO().setSaleAndReviewNumber(c.getProducts()); String sort = request.getParameter("sort"); if(null!=sort){ switch(sort){ case "review": Collections.sort(c.getProducts(),new ProductReviewComparator()); break; case "date" : Collections.sort(c.getProducts(),new ProductDateComparator()); break; case "saleCount" : Collections.sort(c.getProducts(),new ProductSaleCountComparator()); break; case "price": Collections.sort(c.getProducts(),new ProductPriceComparator()); break; case "all": Collections.sort(c.getProducts(),new ProductAllComparator()); break; } } request.setAttribute("c", c); return "category.jsp"; } public String search(HttpServletRequest request, HttpServletResponse response, Page page){ String keyword = request.getParameter("keyword"); List<Product> ps= new ProductDAO().search(keyword,0,20); productDAO.setSaleAndReviewNumber(ps); request.setAttribute("ps",ps); return "searchResult.jsp"; } public String buyone(HttpServletRequest request, HttpServletResponse response, Page page) { int pid = Integer.parseInt(request.getParameter("pid")); int num = Integer.parseInt(request.getParameter("num")); Product p = productDAO.get(pid); int oiid = 0; User user =(User) request.getSession().getAttribute("user"); boolean found = false; List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); for (OrderItem oi : ois) { if(oi.getProduct().getId()==p.getId()){ oi.setNumber(oi.getNumber()+num); orderItemDAO.update(oi); found = true; oiid = oi.getId(); break; } } if(!found){ OrderItem oi = new OrderItem(); oi.setUser(user); oi.setNumber(num); oi.setProduct(p); orderItemDAO.add(oi); oiid = oi.getId(); } return "@forebuy?oiid="+oiid; } public String buy(HttpServletRequest request, HttpServletResponse response, Page page){ String[] oiids=request.getParameterValues("oiid"); List<OrderItem> ois = new ArrayList<>(); float total = 0; for (String strid : oiids) { int oiid = Integer.parseInt(strid); OrderItem oi= orderItemDAO.get(oiid); total +=oi.getProduct().getPromotePrice()*oi.getNumber(); ois.add(oi); } request.getSession().setAttribute("ois", ois); request.setAttribute("total", total); return "buy.jsp"; } public String addCart(HttpServletRequest request, HttpServletResponse response, Page page) { int pid = Integer.parseInt(request.getParameter("pid")); Product p = productDAO.get(pid); int num = Integer.parseInt(request.getParameter("num")); User user =(User) request.getSession().getAttribute("user"); boolean found = false; List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); for (OrderItem oi : ois) { if(oi.getProduct().getId()==p.getId()){ oi.setNumber(oi.getNumber()+num); orderItemDAO.update(oi); found = true; break; } } if(!found){ OrderItem oi = new OrderItem(); oi.setUser(user); oi.setNumber(num); oi.setProduct(p); orderItemDAO.add(oi); } return "%success"; } public String cart(HttpServletRequest request, HttpServletResponse response, Page page) { User user =(User) request.getSession().getAttribute("user"); List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); request.setAttribute("ois", ois); return "cart.jsp"; } public String changeOrderItem(HttpServletRequest request, HttpServletResponse response, Page page) { User user =(User) request.getSession().getAttribute("user"); if(null==user) return "%fail"; int pid = Integer.parseInt(request.getParameter("pid")); int number = Integer.parseInt(request.getParameter("number")); List<OrderItem> ois = orderItemDAO.listByUser(user.getId()); for (OrderItem oi : ois) { if(oi.getProduct().getId()==pid){ oi.setNumber(number); orderItemDAO.update(oi); break; } } return "%success"; } public String deleteOrderItem(HttpServletRequest request, HttpServletResponse response, Page page){ User user =(User) request.getSession().getAttribute("user"); if(null==user) return "%fail"; int oiid = Integer.parseInt(request.getParameter("oiid")); orderItemDAO.delete(oiid); return "%success"; } }
步骤 6 :

提交到结算页面

edit
增值内容,请先登录
完整的J2EE模仿天猫项目,使用J2SE、前端技术(包含所有前端jsp文件)、J2EE一整套技术栈, 从无到有涵盖全部147个知识点,475个开发步骤, 充实J2EE项目经验,为简历加上一个有吸引力的砝码.
增值内容,点击购买
使用爬虫已经被系统记录,请勿使用爬虫,增大封号风险。 如果是误封 ,请联系站长,谢谢
提交到结算页面


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问答区域    
2021-01-25 deleteOrderItem,根据ooid删除购物车产品,那我登陆状态下,输入别人购物车的oiid也可以删除别人购物车的产品啊
星归

https://how2j.cn/tmall/foredeleteOrderItem?oiid=24285




1 个答案

how2j
答案时间:2021-02-02
是的,这个做的不好,应该判断oiid所属用户



回答已经提交成功,正在审核。 请于 我的回答 处查看回答记录,谢谢
答案 或者 代码至少填写一项, 如果是自己有问题,请重新提问,否则站长有可能看不到




2019-12-20 当我把删除按钮上的oiid属性去掉后的一个疑问
我不是个前端




如图,当我F12把删除按钮上的oiid去掉,相当于给后台发送了一个值为undefine的oiid,为什么也会跳转到login.jsp
加载中

							

							


1 个答案

how2j
答案时间:2019-12-20
去掉oiid后,应该就抛出异常了吧? 跳转到login.jsp是因为没有登陆,这2者之间没有关系吧。



回答已经提交成功,正在审核。 请于 我的回答 处查看回答记录,谢谢
答案 或者 代码至少填写一项, 如果是自己有问题,请重新提问,否则站长有可能看不到





2019-10-22 删除订单项后,页面上对应的订单项仅仅是被隐藏而不是真正删除的问题等
2019-04-27 bug
2018-12-01 关于 changeOrderItem 问题


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关于 实践项目-天猫整站J2EE-购物车页面操作 的提问

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