Help: unable to open files created with ZipOutputStream

Question

I am seeing some weird behavior with ZipOutputStream, using JDK 1.3.1_01 on Win2K. The code that follows is a snippet from a servlet that delivers a ZIP archive of a set an entire directory tree. I was preparing to roll it into production, but one of my testers noticed a bug that I didn't see.
It seems that her version of WinZip (6.x) was unable to properly extract the files from the archive while mine (8.0) had no problems. I then tried a couple of other programs, and I've been able to reproduce the behavior with the built-in viewer in Lotus Notes 5 (the only other utility I had handy).
I've made sure to call closeEntry() on each ZipEntry, and to call finish() before close() on the ZipOutputStream itself. Has anyone seen this behavior besides me?
Thanks and regards,
Casey
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
    response.setContentType("application/zip");
    response.setHeader("Content-Disposition","attachment; filename=\"package.zip\"");
    File dir = new File(m_templateDir);
    ZipOutputStream out = new ZipOutputStream(response.getOutputStream());
    addFilesToPackage(dir, "", out);
    out.finish();
    out.close();
// Recursively walks the directory, adds files to the output stream,
// and calls itself to handle sub-directories
private void addFilesToPackage(File dir, String pathPrefix, ZipOutputStream out)
throws IOException {
    File[] list = dir.listFiles();
    for (int k=0; k<list.length; k++) {
        File f = list[k];
        if (f.isDirectory()) {
            addFilesToPackage(f, pathPrefix + f.getName() + "/", out);
        } else {
            ZipEntry ze = new ZipEntry(pathPrefix + f.getName());
            out.putNextEntry(ze);
            InputStream in new FileInputStream(f);
            byte[] buff = new byte[2056];
            int bytesRead = 0;
            while((bytesRead = in.read(buff)) > -1) {
                out.write(buff, 0, bytesRead);
            out.closeEntry();
            in.close();
}

Answer 1

I had also a problem with W2K when using ZipInputStream, I could not to solve it.
so I used Unpacked Streams.
weird indeed.
Sometimes it works just fine.
FileInputStream fis;
byte [] in;
//ZipFile zf = new ZipFile(new File("data/products.zip"));
//ZipEntry ze = zf.getEntry("products.wsl");
//fis =new BufferedInputStream( zf.getInputStrea(ze));
fis = new FileInputStream("data/products.wsl");
koko = fis.available();
in = new byte[koko];
fis.read(in);
fis.close();
I think code was something like abowe (there has been a while...)