关于无法解析日期的问题

<%@page contentType="text/html; utf-8" language="java" pageEncoding="UTF-8" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <meta http-equiv="X-UA-Compatible" content="IE=9; IE=8; IE=7; IE=EDGE"/>
    <title></title>
    <link rel="stylesheet" type="text/css" href="css/all.css"/>
    <link rel="stylesheet" type="text/css" href="css/pop.css"/>
    <link rel="stylesheet" type="text/css" href="css/main.css"/>
</head>
<body style="background: #e1e9eb;">
<form action="" id="mainForm" method="post">
    <div class="right">
        <div class="current">
            当前位置：<a href="#">导入/导出</a> &gt; 导入结果
        </div>
        <div class="rightCont">
            <p class="g_title fix">导入结果展示</p>
            <table class="tab1">
                <tbody>
                <tr>
                    <td align="right" width="80">标题：</td>
                    <td>${requestScope.result.title}</td>
                </tr>
                </tbody>
            </table>
            <div class="zixun fix">
                <table class="tab2" width="100%">
                    <tbody>
                    <tr>
                        <th>序号</th>
                        <th>姓名</th>
                        <th>年龄</th>
                        <th>出生日期</th>
                    </tr>
                    <c:forEach items="${requestScope.result.studentList}" var="item" varStatus="idx">

                        <tr>
                            <td>${idx.index}</td>
                            <td>${item.name}</td>
                            <td>${item.age}</td>
                            <td>${item.date}</td>
                                <%--<td><fmt:parseDate value="${item.date}" pattern="yyyy-MM-dd"></fmt:parseDate></td>--%>
                        </tr>
                    </c:forEach>


                    </tbody>
                </table>
            </div>
        </div>
    </div>
</form>
</body>
</html>

不用格式化日期没问题