ByteArrayOutputStream bos = new ByteArrayOutputStream();
 ZipOutputStream zos = new ZipOutputStream(bos);
 ZipEntry ze = new ZipEntry(“Temp.txt”);
 zos.putNextEntry(ze);
 FileInputStream fis = new FileInputStream("Test/File1.txt");
 byte[] buffer = new byte[1024];
 int len;
 while ((len = fis.read(buffer)) > 0) {
   //System.out.println(new String(buffer));
    zos.write(buffer, 0, len);
 }