Setting default filename for servlet-based download

Question

I'm new to servlet programming and am attempting to download a file from the server to the client. When I am prompted to open the file from it's current location or save it to disk, the correct filename appears. However, when I click ok and the Save dialog appears, the default filename isn't the actual name of the file but instead contains the name of the package the servlet is located in. Can anyone tell me how I can change my code to have the default filename appear instead of the package name. Thanks.
Here is the code to call the servlet located in the package named 'frosttwo':
WebgapBeanFactory wgbf = WebgapBeanFactory.getWebgapBeanFactory();
String path = wgbf.getTransferFileDirectory();
String filename = path + request.getParameter("file");
System.out.println(filename);
response.sendRedirect("/servlet/frosttwo.Servlet1?file=" + filename);
Here is the code contained in the servlet:
public class Servlet1 extends HttpServlet {
private static final String CONTENT_TYPE = "text/html";
/**Initialize global variables*/
public void init(ServletConfig config) throws ServletException {
super.init(config);
/**Process the HTTP Get request*/
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String file = null;
try
file = URLDecoder.decode(request.getParameter("file"));
String filename = file.substring((file.lastIndexOf(File.separatorChar) + 1), file.length());
response.setContentType("application/octet-stream");
response.setHeader("Content-disposition", "attachment;filename=" + filename);
File f = new File(file);
FileInputStream is = new FileInputStream(f);
ServletOutputStream s = response.getOutputStream();
byte[] buffer=new byte[8192];
int length=buffer.length;
while((length=is.read(buffer))!=-1)
s.write(buffer,0,length);
s.flush();
catch (IOException ex)
System.err.println("There was an error sending file " + file);
ex.printStackTrace();
catch (Exception ex)
System.err.println("There was an error sending file " + file);
ex.printStackTrace();
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
doGet(request, response);
/**Clean up resources*/
public void destroy() {
Thanks again.

Answer 1

I use something like this for res.setHeader and it works fine for me. In the save dialog box it puts this filename there. But if its not able to find the filename then sometime it used to put servletname instead of filename:
res.setHeader("Content-Disposition","multi-part attachment;filename=\""+
fname+"\";");
hope it helps
vinod