Zip files with Java LS2J script library

Jens Bruntt's tip Zip from LotusScript in Notes/Domino 6 shows you how to compress files to .zip format. It uses the ability of LotusScript to make calls to functionality that is available in the Java language using LS2J. You can also zip all files in a directory with a similar Java LS2J script library. This code shows you how.
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.Deflater;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipFiles {
// Note: 1st arg is the zipfile to produce
  public String zipMyFiles
(String zipFilePath, String
filesToZipFolder) {
    String result = "";

    try {
      ZipOutputStream zos = 
new ZipOutputStream(new 
// compression style

      byte[] readBuffer = new byte[2156];
      int bytesin = 0;
      File filesFolder = new File
( filesToZipFolder ); 
// if filesFolder.isDirectory ???
      String[] fileList = filesFolder.list(); 
// flat directory, no hierarchy allowed

      for (int i = 0; i < fileList.length; i++) {
        File f =new File(filesFolder, fileList[i]);
        if (f.isDirectory()) {
        // ignore it
        else {
          FileInputStream in = 
new FileInputStream(f);
                ZipEntry anEntry = 
new ZipEntry(f.getPath());
                int len;
          while ((bytesin = 
in.read(readBuffer)) != -1) {
            zos.write(readBuffer, 0, bytesin);
    catch (IllegalArgumentException iae) {
      return "ERROR_
    catch (FileNotFoundException fnfe) {
      return "ERROR_FILENOTFOUND";
    catch (IOException ioe) {
      return "ERROR_IOEXCEPTION";
    return "OK";

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This tip was submitted to the SearchDomino.com tip exchange by member Mark Bryson. Please let others know how useful it is via the rating scale below. Do you have a useful Notes/Domino tip or code to share? Submit it to our monthly tip contest and you could win a prize and a spot in our Hall of Fame.

This was first published in September 2004

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