Compress4J
Overview
Compress4J is an up-to-date fork of JArchiveLib.
It’s a simple archiving and compression library for Java that provides a thin and easy-to-use API layer on top of the powerful and feature-rich org.apache.commons.compress.
Usage
Using the ArchiverFactory
Create a new Archiver to handle zip archives
Archiver archiver = ArchiverFactory.createArchiver(ArchiveFormat.ZIP);Create a new Archiver to handle tar archives with gzip compression
Archiver archiver = ArchiverFactory.createArchiver(ArchiveFormat.TAR, CompressionType.GZIP);Alternatively you can use string representations of the archive and compression types.
Archiver archiver = ArchiverFactory.createArchiver("zip");The ArchiveFactory can also detect archive types based on file extensions and hand you the correct Archiver.
This example returns an Archiver instance that handles tar.gz files.
(It would also recognize the .tgz extension)
Archiver archiver = ArchiverFactory.createArchiver(new File("archive.tar.gz"));Using Archivers
Extract
To extract the zip archive /home/jack/archive.zip to /home/jack/archive:
File archive = new File("/home/jack/archive.zip");
File destination = new File("/home/jack/archive");
Archiver archiver = ArchiverFactory.createArchiver(ArchiveFormat.ZIP);
archiver.extract(archive, destination);Create
To create a new tar archive with gzip compression archive.tar.gz in /home/jack/ containing the entire directory /home/jack/archive
String archiveName = "archive";
File destination = new File("/home/jack");
File source = new File("/home/jack/archive");
Archiver archiver = ArchiverFactory.createArchiver(ArchiveFormat.TAR, CompressionType.GZIP);
File archive = archiver.create(archiveName, destination, source);notice that you can omit the filename extension in the archive name, as it will be appended by the archiver automatically if it is missing.
Stream
To access the contents of an archive as a Stream, rather than extracting them directly onto the filesystem
ArchiveStream stream = archiver.stream(archive);
ArchiveEntry entry;
while((entry = stream.getNextEntry()) != null) {
// access each archive entry individually using the stream
// or extract it using entry.extract(destination)
// or fetch meta-data using entry.getName(), entry.isDirectory(), ...
}
stream.close();