public static  ZipOutputStream zipBytes(String in) throws IOException {
        byte[] input = in.getBytes();
        ZipOutputStream zos = new ZipOutputStream(new FileOutputStream("example.zip"));
        ZipEntry entry = new ZipEntry("test.txt");
        entry.setSize(input.length);
        zos.putNextEntry(entry);
        zos.write(input);
        zos.closeEntry();
        zos.close();
        return zos;
    }