How to zip a whole catalog with Java?

Question

can you tell me how to zip a whole catalog?
i am not able to find a method that can zip a whole catalog and the files in it.
please help me,thanks

Answer 1

The following program is an extension of the code posted at:
http://forum.java.sun.com/thread.jsp?forum=31&thread=48084
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream ;
import java.util.zip.CRC32;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
import java.util.Date;
public class NZipCompresser {
   private String m_basePath=null;
   private File m_dir = null;
   private String m_OutputFileName;
   public static void main(String[] args) {
      File directory=new File(args[0]);
      new NZipCompresser(directory, args[1]);
   public NZipCompresser() {
   // This class gets directory and compress it reqursivelyinto zip file named outputFileName
   public NZipCompresser(File directory,String outputFileName) {
      m_dir = directory;
      m_OutputFileName = outputFileName;
      try {
         compress();
      } catch (Throwable e) {}
   public void compress () throws Exception {
      try {
         FileOutputStream zipFilename = new FileOutputStream(m_OutputFileName) ;
         ZipOutputStream zipoutputstream = new ZipOutputStream (zipFilename);
         m_basePath = m_dir.getPath();
         CompressDir (m_dir,zipoutputstream);
         zipoutputstream.setMethod(ZipOutputStream.DEFLATED);
         zipoutputstream.close();
      catch (Exception e) {
         throw new Exception ("Something wrong in compresser: " + e);
   public void setDirectory (File dir) {
      m_dir = dir;
   public void setOutputFileName (String FileName) {
      m_OutputFileName = FileName;
   public File getDirectory () {
      return m_dir;
   public String getOutputFileName () {
      return m_OutputFileName;
   //Walker through directory structure
   private void CompressDir (File f, ZipOutputStream zipoutputstream) {
      System.out.println(f);
      if (f.isDirectory()) {
         File [] files = f.listFiles();
         for (int j=0;j<files.length;j++) {
            if (files[j].isDirectory()) {
               System.out.println("calling CompressOneDir with:"+files[j].getPath());
               CompressDir (files[j],zipoutputstream);
            if (files[j].isFile()) {
               System.out.println("adding file:" +  files[j].getPath());
               addOneFile(files[j],zipoutputstream);
      System.out.println("exiting:"+f);
   //Actualy compress the file
   private void addOneFile (File file, ZipOutputStream zipoutputstream) {
      ZipEntry zipentry = new ZipEntry(file.getPath().substring(m_basePath.length()+1));
      FileInputStream fileinputstream;
      CRC32 crc32 = new CRC32();
      byte [] rgb = new byte [1024];
      int n;
      //Compute CRC of input stream
      try {
         fileinputstream = new FileInputStream(file);
         while ((n = fileinputstream.read(rgb)) > -1) {
            crc32.update(rgb, 0, n);
         fileinputstream.close();
      catch (Exception e) {
         System.out.println("Error in computing CRC:");
         e.printStackTrace();
      //Set Up Zip Entry
      zipentry.setSize(file.length());
      zipentry.setTime(file.lastModified());
      zipentry.setCrc(crc32.getValue());
      //Write Data
      try {
         zipoutputstream.putNextEntry(zipentry);
         fileinputstream = new FileInputStream(file);
         while ((n = fileinputstream.read(rgb)) > -1) {
            zipoutputstream.write(rgb, 0, n);
         fileinputstream.close();
         zipoutputstream.closeEntry();
      catch (Exception ex) {
         System.out.println("Error in writing data:");
         ex.printStackTrace();
}Compile this program and run it as follows:
java NZipCompresser directory_name zipOutput_name
Is this what you're looking for?
V.V.