Uncompress BZIP2 archive
The best option I can see is Apache Commons Compress with this Maven dependency.
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.0</version>
</dependency>
From the examples:
FileInputStream in = new FileInputStream("archive.tar.bz2"); FileOutputStream out = new FileOutputStream("archive.tar"); BZip2CompressorInputStream bzIn = new BZip2CompressorInputStream(in); final byte[] buffer = new byte[buffersize]; int n = 0; while (-1 != (n = bzIn.read(buffer))) { out.write(buffer, 0, n); } out.close(); bzIn.close();
Please don't forget to use buffered streams to gain up to 3x speedup!
public void decompressBz2(String inputFile, String outputFile) throws IOException {
var input = new BZip2CompressorInputStream(new BufferedInputStream(new FileInputStream(inputFile)));
var output = new FileOutputStream(outputFile);
try (input; output) {
IOUtils.copy(input, output);
}
}
decompressBz2("example.bz2", "example.txt");
With build.gradle.kts
:
dependencies {
...
implementation("org.apache.commons:commons-compress:1.20")
}