Compress directory to tar.gz with Commons Compress

Question

I\'m running into a problem using the commons compress library to create a tar.gz of a directory. I have a directory structure that is as follows.

parent/
          


        

Answer 1

I had to make some adjustments to @merrick solution to get it to work related to the path. Perhaps with the latest maven dependencies. The currently accepted solution didn't work for me.

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream;
import org.apache.commons.compress.compressors.gzip.GzipCompressorOutputStream;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.IOUtils;
import org.apache.commons.io.filefilter.DirectoryFileFilter;
import org.apache.commons.io.filefilter.RegexFileFilter;

public class TAR {

    public static void CreateTarGZ(String inputDirectoryPath, String outputPath) throws IOException {

        File inputFile = new File(inputDirectoryPath);
        File outputFile = new File(outputPath);

        try (FileOutputStream fileOutputStream = new FileOutputStream(outputFile);
                BufferedOutputStream bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
                GzipCompressorOutputStream gzipOutputStream = new GzipCompressorOutputStream(bufferedOutputStream);
                TarArchiveOutputStream tarArchiveOutputStream = new TarArchiveOutputStream(gzipOutputStream)) {

            tarArchiveOutputStream.setBigNumberMode(TarArchiveOutputStream.BIGNUMBER_POSIX);
            tarArchiveOutputStream.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);

            List files = new ArrayList<>(FileUtils.listFiles(
                    inputFile,
                    new RegexFileFilter("^(.*?)"),
                    DirectoryFileFilter.DIRECTORY
            ));

            for (int i = 0; i < files.size(); i++) {
                File currentFile = files.get(i);

                String relativeFilePath = inputFile.toURI().relativize(
                        new File(currentFile.getAbsolutePath()).toURI()).getPath();

                TarArchiveEntry tarEntry = new TarArchiveEntry(currentFile, relativeFilePath);
                tarEntry.setSize(currentFile.length());

                tarArchiveOutputStream.putArchiveEntry(tarEntry);
                tarArchiveOutputStream.write(IOUtils.toByteArray(new FileInputStream(currentFile)));
                tarArchiveOutputStream.closeArchiveEntry();
            }
            tarArchiveOutputStream.close();
        }
    }
}

Maven

        
            commons-io
            commons-io
            2.6
        

        
            org.apache.commons
            commons-compress
            1.18