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jsp的导出 我这代码错哪。。。。。求大神帮忙

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"  import="java.sql.*"%>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>普通话水平测试报名系统</title>

</head>

<body>

<center>


  <p>&nbsp;</p>

  <p>&nbsp;</p>

  <p>&nbsp;</p>

  <p class="STYLE1">报名信息查询</p>

  <form method="post" action="xx-ym.jsp">

  <p>&nbsp;</p>

  <p> 

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

   &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

    <input type="submit" name="Submit" value="返回">

  </p>


</form>

  <table height="40" border="1" align="center" >

<tr>

<td width="40"  style="display:none;">报名序号</td>

 <td width="100">学号</td>

<td width="100">姓名</td>

<td width="100">学院</td>

<td width="100">专业</td>

<td width="100">班级</td>

<td width="150">身份证号码</td>

<td width="40">性别</td>

<td width="100">出生年月</td>

<td width="100">籍贯</td>

<td width="80">名族</td>

<td width="90">联系电话</td>



</tr>

</table>

</center>

<%

request.setCharacterEncoding("UTF-8");

String bj=request.getParameter("a1");

String driverClass="com.mysql.jdbc.Driver";

String url="jdbc:mysql://localhost:3306/atao";

String uname="root";

String upass="958672";

Connection conn=null;

Class.forName(driverClass);

conn=DriverManager.getConnection(url,uname,upass);

PreparedStatement stmt=conn.prepareStatement("select * from student where classes=?");

stmt.setString(1,bj);

ResultSet rs=stmt.executeQuery();

while(rs.next()){

%>

<center>

<%

        String exportToExcel = request.getParameter("exportToExcel");

        if (exportToExcel != null

                && exportToExcel.toString().equalsIgnoreCase("YES")) {

            response.setContentType("application/vnd.ms-excel");

            response.setHeader("Content-Disposition", "inline; filename="

                    + "excel.xls");

 

        }

    %>

<form action="" method="post">

<table height="40" border="1" align="center" >

<tr>

<td width="40"  style="display:none;"> <%=rs.getString(12)%>

</td>

<td width="100"><%=rs.getString(1) %>

</td>

<td width="100"> <%=rs.getString(2) %>

</td>

<td width="100"> <%=rs.getString(3) %>

</td>

<td width="100"> <%=rs.getString(4) %>

</td>

<td width="100"> <%=rs.getString(5) %>

</td>

<td width="150"> <%=rs.getString(6) %>

</td>

<td width="40"> <%=rs.getString(7) %>

</td>

<td width="100"> <%=rs.getString(8) %>

</td>

<td width="100"> <%=rs.getString(9) %>

</td>

<td width="80"> <%=rs.getString(10) %>

</td>

<td width="90"> <%=rs.getString(11) %>

</td>

      </table>

     <p align="right">

          <%

        if (exportToExcel == null) {

    %>

                     <a href="ycx-conf.jsp?exportToExcel=YES">Export to Excel</a>

               <%

        }

    %>

               </center>

               <%              }

 

      

rs.close();

stmt.close();

conn.close(); 

%> 

          

               </tr>

</p>

        <p>&nbsp;</p>

        <p>&nbsp;</p>

</form>

</body>

</html>


兜兜的麦兜
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