fix<商品加购>

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

@@ -1,6 +1,7 @@
 package example.controller;
 
 import example.model.Computer;
+import example.model.User;
 import example.service.ICartService;
 import example.service.impl.CartServiceImpl;
 
@@ -29,9 +30,11 @@ public class CartServlet extends HttpServlet {
                 }
                 break;
             case "add":
-                String id = req.getParameter("id");
-                req.getSession().setAttribute("cart",id);
-                resp.sendRedirect("/cart");
+                try {
+                    addCart(req,resp);
+                } catch (Exception e) {
+                    throw new RuntimeException(e);
+                }
                 break;
             case "remove":
                 String removeId = req.getParameter("id");
@@ -44,8 +47,17 @@ public class CartServlet extends HttpServlet {
         }
     }
 
+    private void addCart(HttpServletRequest req, HttpServletResponse resp) throws Exception {
+        String id = req.getParameter("id");
+        User user = (User) req.getSession().getAttribute("user");
+        cartService.addCart(Integer.parseInt(id),user.getId());
+        req.setAttribute("msg","加购成功");
+        req.getRequestDispatcher("/computerList").forward(req,resp);
+    }
+
     private void toCart(HttpServletRequest req, HttpServletResponse resp) throws Exception {
-        List<Computer> computers = cartService.myCart(16);
+        User user = (User) req.getSession().getAttribute("user");
+        List<Computer> computers = cartService.myCart(user.getId());
         req.setAttribute("computers",computers);
         req.getRequestDispatcher("cart.jsp").forward(req,resp);
     }

src/main/java/example/controller/UserServlet.java

@@ -39,7 +39,6 @@ public class UserServlet extends HttpServlet {
                 req.getRequestDispatcher("/WEB-INF/jsp/login.jsp").forward(req, resp);
                 break;
         }
-        super.doGet(req, resp);
     }
 
     private void getUserList(HttpServletRequest req, HttpServletResponse resp) throws Exception {

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

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

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

@@ -4,7 +4,6 @@ import example.dao.CartDao;
 import example.model.Computer;
 import example.service.ICartService;
 
-import java.util.Collections;
 import java.util.List;
 
 public class CartServiceImpl implements ICartService {
@@ -15,4 +14,9 @@ public class CartServiceImpl implements ICartService {
     public List<Computer> myCart(Integer userId) throws Exception {
         return cartDao.getCart(userId);
     }
+
+    @Override
+    public void addCart(int productId, int userId) throws Exception {
+        cartDao.addCart(userId, productId);
+    }
 }

src/main/webapp/computerList.jsp

@@ -28,12 +28,16 @@
                     <td>${computer.stock}</td>
                     <td>
                         <a href="/editComputer?id=${computer.id}">Edit</a> |
-                        <a href="/deleteComputer?id=${computer.id}">Delete</a>
+                        <a href="/deleteComputer?id=${computer.id}">Delete</a> |
+                        <a href="/cart?action=add&id=${computer.id}">加购</a>
                     </td>
                 </tr>
             </c:forEach>
         </tbody>
     </table>
+    <hr>
+    <p style="color: red;">${requestScope.msg}</p>
+    <a href="/cart?action=list">我的购物车</a>
     <br/>
     <a href="/addComputer">Add New Computer</a>
     <br>