Creating a tar.gz with Apache Commons-Compress in Java

In this section , you will learn about how to create a tar.gz file from a given directory (not recursively) using apache  commons-compress. 

The complete source code is given below:

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorOutputStream;

/**
 * Creating a tar.gz with apache commons-compress.
 **/
public class TarGZ {
 static final int BUFFER = 2048;

 /**
  * Command line arguments :
  * argv[0]-----> Source directory.
  * argv[1]-----> Destination tar.gz file.
  **/
 public static void main(String argv[]) {

  FileOutputStream fOut = null;
  BufferedOutputStream bOut = null;
  GzipCompressorOutputStream gzOut = null;
  TarArchiveOutputStream tOut = null;

  try {

   /** Step: 1 ---> create a TarArchiveOutputStream object. **/

   fOut = new FileOutputStream(new File(argv[1]));
   bOut = new BufferedOutputStream(fOut);
   gzOut = new GzipCompressorOutputStream(bOut);
   tOut = new TarArchiveOutputStream(gzOut);

   /**
    * Step: 2 --->Open the source data and get a list of files from
    * given directory.
    **/

   File source = new File(argv[0]);
   if (!source.exists()) {
    System.out.println("Input directory does not exist..");
    System.exit(0);
   }
   File files[] = source.listFiles();

   for (int i = 0; i < files.length; i++) {

    System.out.println("Adding File: "
      + source.getParentFile().toURI()
        .relativize(files[i].toURI()).getPath());

    /** Step: 3 ---> Create a tar entry for each file that is read. **/

    /**
     * relativize is used to to add a file to a tar, without
     * including the entire path from root.
     **/

    TarArchiveEntry entry = new TarArchiveEntry(files[i], source
      .getParentFile().toURI().relativize(files[i].toURI())
      .getPath());

    /** Step: 4 ---> Put the tar entry using putArchiveEntry. **/

    tOut.putArchiveEntry(entry);

    /**
     * Step: 5 ---> Write the data to the tar file and close the
     * input stream.
     **/

    FileInputStream fi = new FileInputStream(files[i]);
    BufferedInputStream sourceStream = new BufferedInputStream(fi,
      BUFFER);
    int count;
    byte data[] = new byte[BUFFER];
    while ((count = sourceStream.read(data, 0, BUFFER)) != -1) {
     tOut.write(data, 0, count);
    }
    sourceStream.close();

    /** Step: 6 --->close the archive entry. **/

    tOut.closeArchiveEntry();

   }
   /** Step: 7 --->close the output stream. **/

   tOut.close();
   System.out.println("tar.gz file created successfully!!");
  } catch (Exception e) {
   e.printStackTrace();
  }
 }
}

Create tar.gz File From Directory Recursively

Please visit http://yourjavatutor.blogspot.in/2012/07/create-targz-file-from-directory.html to learn about this topic.