我从sql语句中获取数据并将其放入表中。
我正在尝试为表创建一个小计，然后我可以使用java servlet将其发送到结帐页面。问题是我在通过stackoverflow上的几个例子后遇到了小计工作的问题。
感谢您的时间。
<html>
<head>
<link rel="stylesheet" href="resources/css/main.css">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script type="text/javascript" src="resources/scripts/jquery-1.8.2.min.js"></script>
<title>Home Page</title>
</head>
<body>
<br>
<br>
<script>
(function (global) {
document.getElementById("output").value = global.localStorage.getItem("mySharedData");
}(window));
</script>
<sql:setDataSource var="snapshot" driver="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/sakila"
user="root" password="nbuser"/>
<sql:query dataSource="${snapshot}" var="result">
Select F.title, (F.rental_rate * F.rental_duration) as 'Price'
from cart as C
join cartofitems as CI
on CI.cart_id = C.cart_id
join film as F
on CI.film_id = F.film_id
</sql:query>
<div align="center">
<table width="850" style="BACKGROUND-COLOR: #FFFFFF;" border="1">
<tr>
<td align="center">
<img src="images/cart.png">
</td>
</tr>
<tr>
<td align="center" colspan="3">
<table width="650">
<tr>
<td>
<div align="justify" style="color:#3e160e;">
This is a custom HTML header. This header may contain any HTML code, text,
graphics, active content such as dropdown menus, java, javascript, or other
content that you would like to display at the top of your cart pages. You create
custom HTML header yourself and specify its location in the CustomCart Administrator.
Also note the custom wallpaper (brown striped background), this is uploaded via the
administrator. You may change the wallpaper any time you wish to change the look of
your cart.
</div>
</td>
</tr>
</table>
</td>
<tr>
<tr>
</tr>
</table>
</div>
<div align="center">
<form action="checkout.jsp" method="post" border="">
<table width="850" border="1" class="cart">
<thead>
<tr>
<th>Action</th>
<th>Movie Title</th>
<th>Price</th>
</tr>
</thead>
<tbody>
<c:forEach items="${result.rows}" var="cart">
<tr>
<td><a href="CartServlet?action=delete&orderNum=<c:out value="${product.orderNum}"/>">Delete</a></td>
<td><c:out value="${cart.title}" /></td>
<td class="price"><c:out value="${cart.Price}" /></td>
</tr>
</c:forEach>
<tr class="totalColumn">
<td colspan="2" align="right" ><b>Subtotal: </b></td>
<td align="right" ><b><span id="subtotal"></span></b></td>
<script language="javascript" type="text/javascript">
var tds = document.getElementById('cart').getElementsByTagName('td');
var sum = 0;
for (var i = 0; i < tds.length; i++) {
if (tds[i].className == 'price') {
sum += isNaN(tds[i].innerHTML) ? 0 : parseInt(tds[i].innerHTML);
}
}
document.getElementById('price').innerHTML += '<tr><td>' + sum + '</td><td>total</td></tr>';
</script>
</tr>
</tbody>
</table>
<table width="850" border="1">
<tr>
<div style="width:650px;">
<button type="submit" name="your_name" value="totalCost" class="loginbtn">Checkout Cart</button>
</form>
<p><form action="faces/index.xhtml" method="post">
<button type="submit" name="your_name" value="your_value" class="adminloginbtn">Back To Search</button>
</form>
</div>
</tr>
</tbody>
</table>
</body>
</html>