Untar a tar.gz file with Apache Commons-Compress in Java

In this section , you will learn about how to untar a tar.gz file 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 java.io.IOException;

import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveInputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream;

public class UnTarFile {
 final static int BUFFER = 2048;

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

  /** create a TarArchiveInputStream object. **/

  FileInputStream fin = new FileInputStream(args[0]);
  BufferedInputStream in = new BufferedInputStream(fin);
  GzipCompressorInputStream gzIn = new GzipCompressorInputStream(in);
  TarArchiveInputStream tarIn = new TarArchiveInputStream(gzIn);

  TarArchiveEntry entry = null;

  /** Read the tar entries using the getNextEntry method **/

  while ((entry = (TarArchiveEntry) tarIn.getNextEntry()) != null) {

   System.out.println("Extracting: " + entry.getName());

   /** If the entry is a directory, create the directory. **/

   if (entry.isDirectory()) {

    File f = new File(args[1] + entry.getName());
    f.mkdirs();
   }
   /**
    * If the entry is a file,write the decompressed file to the disk
    * and close destination stream.
    **/
   else {
    int count;
    byte data[] = new byte[BUFFER];

    FileOutputStream fos = new FileOutputStream(args[1]
      + entry.getName());
    BufferedOutputStream dest = new BufferedOutputStream(fos,
      BUFFER);
    while ((count = tarIn.read(data, 0, BUFFER)) != -1) {
     dest.write(data, 0, count);
    }
    dest.close();
   }
  }

  /** Close the input stream **/

  tarIn.close();
  System.out.println("untar completed successfully!!");
 }

}