📄 showcart.jsp
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<%@ page contentType="text/html; charset=gb2312"%>
<%@include file="common.jsp"%>
<%@page import="java.util.Collection,java.util.Iterator"%>
<jsp:useBean id="cart" scope="session" class="beans.CartBean" />
<html>
<head>
<title>欢迎光临E-BOOK网上书店</title>
<link href="incoming/style.css" rel="stylesheet" type="text/css">
</head>
<body>
<%@ include file="incoming/header.jsp"%>
<%
request.setCharacterEncoding("GB2312");
String action=request.getParameter("action");
if(action!=null && action.equals("保存修改"))
{
String strItemNum=request.getParameter("itemnum");
if(null==strItemNum || "".equals(strItemNum))
{
throw new ServletException("非法的参数");
}
int itemNum=Integer.parseInt(strItemNum);
for(int i=0;i<itemNum;i++)
{
String strNum=request.getParameter("num_"+i);
String strBookId=request.getParameter("book_"+i);
int quantity=Integer.parseInt(strNum);
int bookId=Integer.parseInt(strBookId);
boolean bEnough=bookdb.isAmountEnough(bookId,quantity);
if(bEnough)
{
cart.setItemNum(new Integer(bookId),quantity);
}
else
{
BookBean book=bookdb.getBook(bookId);
out.println("<font color=\"red\" size=\"4\">");
out.print("《"+book.getTitle()+"》");
out.print("的库存数量只有"+book.getAmount()+"本，请调整购买数量!<p>");
out.println("</font>");
}
}
}
%>
<%
Collection<CartItemBean> cl=cart.getItems();
if(cl.size()<=0)
{
out.println("购物车中没有图书<p>");
%>
<a href="index.jsp">继续购物</a><br>
<%@ include file="incoming/footer.jsp"%>
<%
return;
}
Iterator<CartItemBean> it=cl.iterator();
%>
<form name="theform" action="showcart.jsp" method="POST">
<table border="1">
<tr>
<th>
书名
</th>
<th>
价格
</th>
<th>
数量
</th>
<th>
小计
</th>
<th>
取消
</th>
</tr>
<%
int i=0;
while(it.hasNext())
{
CartItemBean cartItem=(CartItemBean)it.next();
BookBean book=cartItem.getBook();
int bookId=book.getId();
String fieldNum="num_"+i;
String fieldBook="book_"+i;
%>
<tr>
<td><%=book.getTitle() %></td>
<td><%=book.getPrice() %></td>
<td>
<input type="text" name="<%=fieldNum%>"
value="<%=cartItem.getQuantity() %>" size="2" />
<input type="hidden" name="<%=fieldBook%>" value="<%=bookId%>" />
</td>
<td><%=cartItem.getItemPrice() %></td>
<td>
<a href="delitem.jsp?id=<%=bookId%>">删除</a>
</td>
</tr>
<%
i++;
}
%>
<tr>
<td>
合计
</td>
<td colspan="4"><%=cart.getTotalPrice() %></td>
</tr>
</table>
<p>
<input type="hidden" name="itemnum" value="<%=i%>" />
<input type="submit" name="action" value="保存修改" />
<a href="index.jsp">继续购物</a> <a href="bookdatasave.jsp">进入结算中心</a>
</form>
<br>
<%@ include file="incoming/footer.jsp"%>
</body>
</html>
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