📄 buy.jsp
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<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%@ page import="com.bjsxt.shopping.client.*, com.bjsxt.shopping.product.*" %>
<%
Cart c = (Cart)session.getAttribute("cart");
if(c == null) {
c = new Cart();
session.setAttribute("cart", c);
}
%>
<%
request.setCharacterEncoding("GBK");
String action = request.getParameter("action");
if(action != null && action.trim().equals("add")) {
int id = Integer.parseInt(request.getParameter("id"));
Product p = ProductMgr.getInstance().loadById(id);
CartItem ci = new CartItem();
ci.setProduct(p);
ci.setCount(1);
c.add(ci);
}
if(action != null && action.trim().equals("delete")) {
int id = Integer.parseInt(request.getParameter("id"));
c.deleteItemById(id);
}
if(action != null && action.trim().equals("update")) {
for(int i=0; i<c.getItems().size(); i++) {
CartItem ci = c.getItems().get(i);
int count = Integer.parseInt(request.getParameter("p" + ci.getProduct().getId()));
ci.setCount(count);
}
}
%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%
List<CartItem> items = c.getItems();
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030">
<title>购物车</title>
</head>
<body>
<form action="Buy.jsp" method="get">
<input type="hidden" name="action" value="update"/>
<table align="center" border="1">
<tr>
<td>产品ID</td>
<td>产品名称</td>
<td>购买数量</td>
<td>单价</td>
<td>总价</td>
<td>处理</td>
</tr>
<%
for(Iterator<CartItem> it = items.iterator(); it.hasNext(); ) {
CartItem ci = it.next();
%>
<tr>
<td><%=ci.getProduct().getId() %></td>
<td><%=ci.getProduct().getName() %></td>
<td>
<input type="text" size=3 name="<%="p" + ci.getProduct().getId() %>" value="<%=ci.getCount() %>">
</td>
<td><%=ci.getProduct().getNormalPrice() %></td>
<td><%=ci.getProduct().getNormalPrice()*ci.getCount() %></td>
<td>
<a href="Buy.jsp?action=delete&id=<%=ci.getProduct().getId() %>">删除</a>
</td>
</tr>
<%
}
%>
<tr>
<td colspan=6>
<a href="Confirm.jsp">下单</a>
<a href="javascript:document.forms[0].submit()">修改</a>
</td>
</tr>
</table>
</form>
</body>
</html>
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