jstl输出哪里错了啊，

Question

List<Bill> billList = (List)request.getAttribute("BillList")能取到值，是下面的输出错了
<%

                List<Bill> billList = (List)request.getAttribute("BillList");
                
            %>
            <c:forEach items="${requestScope.billList}" var="bill">
                <tr>
                    <td><c:out value="${bill.Id}" default="moren"></c:out></td>
                    <td><c:out value="${bill.productName}"></c:out></td>
                    <td><c:out value="${bill.counts}"></c:out></td>
                    <td><c:out value="${bill.billMoney}"></c:out></td>
                    <td><c:out value="${bill.isPay}"></c:out></td>
                    <td><c:out value="${bill.productName}"></c:out></td>
                    <td><c:out value="${bill.productDesc}"></c:out></td>
                    <td><c:out value="${bill.billTime}"></c:out></td>
                </tr>
            </c:forEach>

Answer 1

<c:forEach items="${requestScope.BillList}" var="bill">大小写不对