List file under directory using JSP

Hi,
Does anyone have a code to list all files under a certain directory in JSP? Thanks alot!

thank you so much... l already have a code working, but l can't make it download excle file as it displays them online. l want to force download. thanks
<%@ page import="java.io.*" %>
<%@ page import="java.util.*" %>
<%@ page errorPage="listFiles_error.jsp" %>
<%
// To change the directory that is listed, change this variable
// \ character must be escaped with a second \ as below
String directoryName = "c:\\Tomcat\\webapps\\examples\\jsp";
// This variable needs to point to the URL that will be after the
// domain name for the above directory (needs to be setup in your
// application server)
String urlName = "/examples/jsp/";
// Loads the list of files in the directory
File directory = new File(directoryName);
File[] fileList = directory.listFiles();
Hashtable sortedFiles = new Hashtable(fileList.length);
// Loops through each file
for(int i=0; i<fileList.length; i++) {
File file = fileList;
// Skip subdirectories
if(file.isDirectory())
continue;
String name = file.getName();
int dotIndex = name.indexOf('.');
// Skip files with no extension
if(dotIndex < 0 || dotIndex+1 >= name.length())
continue;
String fileName = name.substring(0,dotIndex);
String fileType = name.substring(dotIndex+1).toLowerCase();
// Only process PDF, REP, and XLS file types
if(!fileType.equals("pdf") && !fileType.equals("rep") && !fileType.equals("xls"))
continue;
// Organize like filenames for processing later
Hashtable fileTypes = (Hashtable)sortedFiles.get(fileName);
if(fileTypes == null) {
fileTypes = new Hashtable(10);
sortedFiles.put(fileName,fileTypes);
fileTypes.put(fileType,file);
%>
<html>
<head>
<title>
listFiles
</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><style type="text/css">

</style></head>
<body bgcolor="#ffffff">
<table width="100%" border="0">
<tr>
<th background="chead.gif" scope="col"><div align="left"><img src="jpmorgan_logo.gif" width="200" height="40" border="0"></div></th>
</tr>
</table>
<p> </p>
<TABLE width="700" height="106" border="1" align="center" cellpadding="1" cellspacing="1" bordercolor="#000033">
<tr>
<th width="370" height="33"><div align="left" class="style2">Name</div></th>
<th width="40"><div align="left" class="style2">PDF</div></th>
<th width="40"><div align="left" class="style2">Rep</div></th>
<th width="40"><div align="left" class="style2">Excel</div></th>
</tr>
<%
// Loop through each file name, outputting the data in a tabular format.
Enumeration e = sortedFiles.keys();
while(e.hasMoreElements()) {
String fileName = (String)e.nextElement();
Hashtable fileTypes = (Hashtable)sortedFiles.get(fileName);
File pdfFile = (File)fileTypes.get("pdf");
File reportFile = (File)fileTypes.get("rep");
File excelFile = (File)fileTypes.get("xls");
%>
<tr>
<td height="63" align="left" valign="bottom"><div align="left" class="style3"><%=fileName%></DIV></td>
<% if(pdfFile != null) {
// Output the PDF Entry
%> <td width="40" align="left" valign="bottom"><a href="<%=urlName+pdfFile.getName()%>"><img src="PDF.gif" width="40" height="40" border="0"></a></td>
<% } else {
%> <td width="40" align="left" valign="bottom"> </td>
<% }
%>
<% if(reportFile != null) {
// Output the Report Entry
%> <td width="40" align="left" valign="bottom"><a href="<%=urlName+reportFile.getName()%>"><img src="Rep.gif" width="40" height="40" border="0"></a></td>
<% } else {
%> <td width="1" align="left" valign="bottom"> </td>
<% }
%>
<% if(excelFile != null) {
// Output the Excel Entry
%> <td width="40" align="left" valign="bottom"><a href="<%=urlName+excelFile.getName()%>"><img src="xls.Gif" width="40" height="40" border="0"></a></td>
<% } else {
%> <td width="1"> </td>
<% }
%>
</tr>
<%
%>
</table>
</body>
</html>

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