how to display data in excel sheet?

1)id.jsp:

<%@page import="java.sql.*"%>
<%
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root", "root");
Statement st=conn.createStatement();
ResultSet rs=st.executeQuery("select * from user");
while(rs.next()){
    %>
    <a href="retrievedata.jsp?id=<%=rs.getString("id")%>">User <%=rs.getString("id")%></a><br>
    <%
}
    %>

2)retrievedata.jsp:

<%@page import="java.sql.*"%>
<form method="post" action="excelFile.jsp">
<table>
<%
String id=request.getParameter("id");
Class.forName("com.mysql.jdbc.Driver").newInstance();  
 Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test","root","root");  
Statement st=con.createStatement();
ResultSet rs=st.executeQuery("Select * from user where id='"+id+"'");
if(rs.next()){
    %>
<tr><td>Name</td><td><input type="text" name="name" value="<%=rs.getString("name")%>"></td></tr>
<tr><td>Address</td><td><input type="text" name="address" value="<%=rs.getString("address")%>"></td></tr>
<%
}
%>
</table>
<input type="submit" value="Export To Excel">
</form>

3)excelFile.jsp:

<%@page import="  java.io.*"%>  
<%@page import="  org.apache.poi.hssf.usermodel.*"%>  
<%
String name=request.getParameter("name");
String address=request.getParameter("address");
String filename="c:/data.xls" ;
try{

HSSFWorkbook hwb=new HSSFWorkbook();
HSSFSheet sheet =  hwb.createSheet("sheet");

HSSFRow row=   sheet.createRow((short)0);
row.createCell((short) 0).setCellValue(name);
row.createCell((short) 1).setCellValue(address);

FileOutputStream fileOut =  new FileOutputStream(filename);
hwb.write(fileOut);
fileOut.close();
out.println("Your excel file has been generated!");
} 
catch(Exception ex ){
System.out.println(ex);
}
File f = new File(filename);
    String fn=f.getName();
    response.setContentType("application/excel");
    response.setHeader("Content-Disposition", "attachment;  filename=\""+fn+"\"");

    String n = f.getName().substring(f.getName().lastIndexOf("/") + 1,f.getName().length());
    InputStream in = new FileInputStream(f);
        ServletOutputStream outs = response.getOutputStream();
        int bit = 256;
        int i = 0;
            try{
                    while ((bit) >= 0) {
                        bit = in.read();
                        outs.write(bit);
                    }
                        } catch (IOException ioe) {
                        ioe.printStackTrace(System.out);
                    }
                        outs.flush();
                    outs.close();
                    in.close(); 
                    %>

I want to open that data.xls file which is saved.

I mean When I am going to click Export to Excel it will save and automatically open in Excel not in Browser.

Please Help Me