How to update war content without extracting /unpacking

private static void updateIBPublicationBuilderWar(String installationPath) throws IOException {
    String warFilePath = "orignal war file"; // ex test.war
    String tempWarFilePath = "temp war file name" ; // temp.war
    File warFile = new File(warFilePath);
    File tempWarFile = new File(tempWarFilePath);
    ZipFile zipFile = new ZipFile(warFile);
    FileOutputStream fos = new FileOutputStream(tempWarFile);
    ZipOutputStream zipOutputStream = new ZipOutputStream(fos);
    for (Enumeration enumeration = zipFile.entries(); enumeration.hasMoreElements();) {
      ZipEntry zipEntry = (ZipEntry) enumeration.nextElement();
      if (!zipEntry.getName().equalsIgnoreCase("WEB-INF/classes/ibserver.properties")) {
        zipOutputStream.putNextEntry(zipEntry);
        InputStream inputStream = zipFile.getInputStream(zipEntry);
        byte[] buf = new byte[1024];
        int len;
        while ((len = inputStream.read(buf)) > 0) {
          zipOutputStream.write(buf, 0, len);
        }
        inputStream.close();
      } else {
        zipOutputStream.putNextEntry(new ZipEntry("WEB-INF/classes/ibserver.properties"));
        InputStream inputStream = zipFile.getInputStream(zipEntry);
        Properties props = new Properties();
        props.load(inputStream);
        inputStream.close();
        props.setProperty("projectspath", installationPath + File.separator + "InBetweenServer" + File.separator + "Projects");
        props.setProperty("serverpath", installationPath + File.separator + "InBetweenServer");
        props.store(zipOutputStream, null);
        inputStream.close();
      }
      zipOutputStream.closeEntry();
    }
    zipFile.close();
    zipOutputStream.closeEntry();
    zipOutputStream.close();
    fos.close();
    warFile.delete();
    File newWarFileName = new File(warFilePath);
    tempWarFile.renameTo(newWarFileName);
  }