1 案例效果
2 案例分析
1 我的订单的分析
2 MapListHandler分析
3 代码实现
1 header.jsp代码修改
2 ProductServlet代码
// 10 获取登录用户所有订单信息 myOrders
public void myOrders(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
HttpSession session = request.getSession();
ProductService service = new ProductService();
// 首先应该判断用户是否登录了
User user = (User) session.getAttribute("user");
//如果没有登录则跳转到登录页面
if(user==null){
//重定向到登录页面
response.sendRedirect(request.getContextPath()+"/login.jsp");
//不在执行继续执行之后的代码
return;
}
// 根据登录用户的uid获取该用户的订单列表（单表查询orders表）
//集合中的每一个Order对象的数据是不完整的。 缺少List<OrderItem> orderItems
// private User user;//该订单属于哪个用户
List<Order> orderList = null;
try {
orderList = service.findOrder(user);
} catch (SQLException e) {
e.printStackTrace();
}
//循环遍历所有的订单，为每一个订单填充订单项集合信息。
if(orderList!=null){
for (Order order : orderList) {
//根据order的oid进行查询
//获得每一个订单的oid
String oid = order.getOid();
//查询该订单的所有订单项 ---mapList封装的是多个订单项和该订单项中的商品的信息。
List<Map<String, Object>> mapList = service.findAllItemsByOid(oid);
//将mapList转换成List<OrderItem> orderItems
for(Map<String, Object> map:mapList){
try {
//1 从map中取出count subtotal 封装到OrderItem中
//item.setCount(Integer.parseInt(map.get("count").toString()));
OrderItem item = new OrderItem();
BeanUtils.populate(item, map);
// 2 从map中取出pimage pname shop_price 封装到product中
Product product = new Product();
BeanUtils.populate(product, map);
// 3 将product 封装到OrderItem中
item.setProduct(product);
// 4 将OrderItem封装到List<OrderItem> orderItems中
order.getOrderItems().add(item);
} catch (IllegalAccessException | InvocationTargetException e) {
e.printStackTrace();
}
}
}
}
//到这里orderList封装完整了
request.setAttribute("orderList", orderList);
//转发
request.getRequestDispatcher("/order_list.jsp").forward(request, response);
}
3 ProductService代码
//获取登录用户的订单集合
public List<Order> findOrder(User user) throws SQLException {
ProductDao dao = new ProductDao();
return dao.findOrder(user);
}
//查询指定的订单的所有订单项
public List<Map<String, Object>> findAllItemsByOid(String oid) {
ProductDao dao = new ProductDao();
List<Map<String, Object>> mapList =null;
try {
mapList = dao.findAllItemsByOid(oid);
} catch (SQLException e) {
e.printStackTrace();
}
return mapList;
}
4 ProductDao代码
//获取登录用户的所有订单列表
public List<Order> findOrder(User user) throws SQLException {
QueryRunner qr = new QueryRunner(C3P0Utils.getDataSource());
String sql = "select * from orders where uid=?";
List<Order> orderList = qr.query(sql, new BeanListHandler<Order>(Order.class), user.getUid());
return orderList;
}
// 查询指定的订单的所有订单项
public List<Map<String, Object>> findAllItemsByOid(String oid) throws SQLException {
QueryRunner qr = new QueryRunner(C3P0Utils.getDataSource());
String sql = "select i.count,i.subtotal,p.pname,p.pimage,p.shop_price"
+ " from orderitem i,product p "
+ "where i.pid=p.pid and oid=?";
List<Map<String, Object>> mapList = qr.query(sql, new MapListHandler(), oid);
return mapList;
}
5 order_list.jsp代码
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>会员登录</title>
<link rel="stylesheet" href="css/bootstrap.min.css" type="text/css" />
<script src="js/jquery-1.11.3.min.js" type="text/javascript"></script>
<script src="js/bootstrap.min.js" type="text/javascript"></script>
<!-- 引入自定义css文件 style.css -->
<link rel="stylesheet" href="css/style.css" type="text/css" />
<style>
body {
margin-top: 20px;
margin: 0 auto;
}
.carousel-inner .item img {
width: 100%;
height: 300px;
}
</style>
</head>
<body>
<!-- 引入header.jsp -->
<jsp:include page="/header.jsp"></jsp:include>
<div class="container">
<div class="row">
<div style="margin: 0 auto; margin-top: 10px; width: 950px;">
<strong>我的订单</strong>
<table class="table table-bordered">
<c:forEach items="${requestScope.orderList }" var="order">
<tbody>
<tr class="success">
<th colspan="5">订单编号:${order.oid} ${order.state==0?"未付款":"已付款" }</th>
</tr>
<tr class="warning">
<th>图片</th>
<th>商品</th>
<th>价格</th>
<th>数量</th>
<th>小计</th>
</tr>
<c:forEach items="${order.orderItems }" var="orderItem">
<tr class="active">
<td width="60" width="40%"><input type="hidden" name="id"
value="22"> <img src="${pageContext.request.contextPath }/${orderItem.product.pimage}" width="70"
height="60"></td>
<td width="30%"><a target="_blank">${orderItem.product.pname}</a></td>
<td width="20%">￥${orderItem.product.shop_price }</td>
<td width="10%">${orderItem.count }</td>
<td width="15%"><span class="subtotal">￥${orderItem.subtotal }</span></td>
</tr>
</c:forEach>
</tbody>
</c:forEach>
</table>
</div>
</div>
<div style="text-align: center;">
<ul class="pagination">
<li class="disabled"><a href="#" aria-label="Previous"><span
aria-hidden="true">«</span></a></li>
<li class="active"><a href="#">1</a></li>
<li><a href="#">2</a></li>
<li><a href="#">3</a></li>
<li><a href="#">4</a></li>
<li><a href="#">5</a></li>
<li><a href="#">6</a></li>
<li><a href="#">7</a></li>
<li><a href="#">8</a></li>
<li><a href="#">9</a></li>
<li><a href="#" aria-label="Next"> <span aria-hidden="true">»</span>
</a></li>
</ul>
</div>
</div>
<!-- 引入footer.jsp -->
<jsp:include page="/footer.jsp"></jsp:include>
</body>
</html>
原文地址：https://www.cnblogs.com/jepson6669/p/8449175.html
时间： 2024-10-18 00:51:29