add<订单确认>

src/main/java/example/controller/CartServlet.java

@@ -37,9 +37,11 @@ public class CartServlet extends HttpServlet {
                 }
                 break;
             case "remove":
-                String removeId = req.getParameter("id");
-                req.getSession().removeAttribute(removeId);
-                resp.sendRedirect("/cart");
+                try {
+                    removeFromCart(req, resp);
+                } catch (Exception e) {
+                    throw new RuntimeException(e);
+                }
                 break;
             default:
                 req.getRequestDispatcher("/WEB-INF/jsp/cart.jsp").forward(req,resp);
@@ -47,6 +49,17 @@ public class CartServlet extends HttpServlet {
         }
     }
 
+    private void removeFromCart(HttpServletRequest req, HttpServletResponse resp) throws Exception {
+        User user = (User) req.getSession().getAttribute("user");
+        String id = req.getParameter("id");
+        cartService.removeFromCart(Integer.parseInt(id),user.getId());
+        try {
+            toCart(req, resp);
+        } catch (Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+
     private void addCart(HttpServletRequest req, HttpServletResponse resp) throws Exception {
         String id = req.getParameter("id");
         User user = (User) req.getSession().getAttribute("user");

src/main/java/example/controller/OrdersServlet.java

@@ -22,6 +22,13 @@ public class OrdersServlet extends HttpServlet {
             case "all":
                 ordersService.allOrder(req, resp);
                 break;
+            case "add":
+                try {
+                    ordersService.checkOrder(req, resp);
+                } catch (Exception e) {
+                    throw new RuntimeException(e);
+                }
+                break;
             case "delete":
 //                ordersService.delete(req, resp);
                 break;

src/main/java/example/service/ICartService.java

@@ -8,4 +8,6 @@ public interface ICartService {
     List<Computer> myCart(Integer userId) throws Exception;
 
     void addCart(int i, int id) throws Exception;
+
+    void removeFromCart(int i, int id) throws Exception;
 }

src/main/java/example/service/IOrdersService.java

@@ -9,4 +9,6 @@ import java.util.List;
 public interface IOrdersService {
 
     void allOrder(HttpServletRequest req, HttpServletResponse resp);
+
+    void checkOrder(HttpServletRequest req, HttpServletResponse resp) throws Exception;
 }

src/main/java/example/service/impl/CartServiceImpl.java

@@ -19,4 +19,9 @@ public class CartServiceImpl implements ICartService {
     public void addCart(int productId, int userId) throws Exception {
         cartDao.addCart(userId, productId);
     }
+
+    @Override
+    public void removeFromCart(int i, int id) throws Exception {
+        cartDao.deleteCart(id, i);
+    }
 }

src/main/java/example/service/impl/OrdersServiceImpl.java

@@ -1,7 +1,10 @@
 package example.service.impl;
 
+import example.dao.CartDao;
 import example.dao.OrdersDao;
+import example.model.Computer;
 import example.model.Orders;
+import example.model.User;
 import example.service.IOrdersService;
 
 import javax.servlet.http.HttpServletRequest;
@@ -12,6 +15,8 @@ public class OrdersServiceImpl implements IOrdersService {
 
     OrdersDao ordersDao=new OrdersDao();
 
+    CartDao cartDao = new CartDao();
+
     @Override
     public void allOrder(HttpServletRequest req, HttpServletResponse resp) {
         List<Orders> allOrders = ordersDao.getAllOrders();
@@ -23,4 +28,22 @@ public class OrdersServiceImpl implements IOrdersService {
         }
     }
 
+    @Override
+    public void checkOrder(HttpServletRequest req, HttpServletResponse resp) throws Exception {
+//        订单确认
+        User user = (User) req.getSession().getAttribute("user");
+        List<Computer> cart = cartDao.getCart(user.getId());
+        Orders orders = new Orders();
+        StringBuilder remark = new StringBuilder();
+        double total_price=0;
+        for (Computer computer : cart) {
+            total_price+=computer.getPrice();
+            remark.append("商品ID：").append(computer.getId()).append("\n").append("商品名称：").append(computer.getName()).append("\n").append("商品价格：").append(computer.getPrice()).append("\n");
+        }
+        orders.setRemark(remark.toString());
+        orders.setTotalPrice(total_price);
+        req.setAttribute("order",orders);
+        req.getRequestDispatcher("checkOrder.jsp").forward(req,resp);
+    }
+
 }

src/main/webapp/cart.jsp

@@ -9,6 +9,7 @@
 </head>
 <body>
     <h1>购物车</h1>
+    <a href="/">主页</a>
     <table border="1">
         <thead>
             <tr>
@@ -25,14 +26,19 @@
                     <td>${computer.name}</td>
                     <td>${computer.price}</td>
                     <td>
-                        <a href="/deleteComputer?id=${computer.id}">移出</a>
+                        <a href="/cart?action=remove&id=${computer.id}">移出</a>
                     </td>
                 </tr>
             </c:forEach>
         </tbody>
     </table>
+    <hr>
+    <a href="/orders?action=add">
+        <button>一键下单</button>
+    </a>
+    <br>
     <br/>
     <br>
-    <a href="/">主页</a>
+
 </body>
 </html>

src/main/webapp/checkOrder.jsp

@@ -0,0 +1,24 @@
+<%@ page contentType="text/html; charset=UTF-8" language="java" %>
+
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>订单确认</title>
+</head>
+<body>
+    <h1>订单确认</h1>
+    <form action="/orders" method="post">
+        <label for="name">总金额: </label><br>
+        <input type="text" id="name" name="name" value="${order.totalPrice}" disabled><br><br>
+        <label for="price">地址: </label><br>
+        <input type="text" id="price" name="price" value="${order.address}" required><br><br>
+        <label for="stock">商品信息: </label><br>
+        <textarea id="stock" name="stock" rows="15" cols="30" disabled>${order.remark}</textarea><br><br>
+        <input type="submit" value="我已确认">
+    </form>
+    <br>
+    <a href="/">主页</a>
+</body>
+</html>