String tempPath = "/tmp/" + label + ".zip";

File zipFile = new File(tempPath);
zipFile.deleteOnExit();
ZipOutputStream zos = null;

try {
    zos = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(zipFile)));

    for (/* loops through files to zip */) {
        InputStream is = methodToGetTheDocument();
        ZipEntry zipEntry = new ZipEntry(document.getLabel());
        zos.putNextEntry(zipEntry);
        byte[] bytes = new byte[2048];
        int count = is.read(bytes);
        while (count > -1) {
            zos.write(bytes, 0, count);
            count = is.read(bytes);
        }
        is.close();
        zos.closeEntry();
    }
    return ok(zipFile);
} catch (Exception e) {
    return badRequest("Bad request");
} finally {
    try {
        zos.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}