如何在Java语言中提取tar (或tar.gz,或tar.bz2)文件?
发布于 2011-09-26 22:05:16
您可以使用Apache Commons压缩库来实现这一点。您可以从http://mvnrepository.com/artifact/org.apache.commons/commons-compress/1.2下载1.2版本。
这里有两种方法:一种是解压缩文件,另一种是解压缩文件。因此,对于文件tar.gz,您需要首先解压缩它,然后再解压缩它。请注意,tar存档也可能包含文件夹,在这种情况下需要在本地文件系统上创建文件夹。
好好享受吧。
/** Untar an input file into an output file.
* The output file is created in the output folder, having the same name
* as the input file, minus the '.tar' extension.
*
* @param inputFile the input .tar file
* @param outputDir the output directory file.
* @throws IOException
* @throws FileNotFoundException
*
* @return The {@link List} of {@link File}s with the untared content.
* @throws ArchiveException
*/
private static List<File> unTar(final File inputFile, final File outputDir) throws FileNotFoundException, IOException, ArchiveException {
LOG.info(String.format("Untaring %s to dir %s.", inputFile.getAbsolutePath(), outputDir.getAbsolutePath()));
final List<File> untaredFiles = new LinkedList<File>();
final InputStream is = new FileInputStream(inputFile);
final TarArchiveInputStream debInputStream = (TarArchiveInputStream) new ArchiveStreamFactory().createArchiveInputStream("tar", is);
TarArchiveEntry entry = null;
while ((entry = (TarArchiveEntry)debInputStream.getNextEntry()) != null) {
final File outputFile = new File(outputDir, entry.getName());
if (entry.isDirectory()) {
LOG.info(String.format("Attempting to write output directory %s.", outputFile.getAbsolutePath()));
if (!outputFile.exists()) {
LOG.info(String.format("Attempting to create output directory %s.", outputFile.getAbsolutePath()));
if (!outputFile.mkdirs()) {
throw new IllegalStateException(String.format("Couldn't create directory %s.", outputFile.getAbsolutePath()));
}
}
} else {
LOG.info(String.format("Creating output file %s.", outputFile.getAbsolutePath()));
final OutputStream outputFileStream = new FileOutputStream(outputFile);
IOUtils.copy(debInputStream, outputFileStream);
outputFileStream.close();
}
untaredFiles.add(outputFile);
}
debInputStream.close();
return untaredFiles;
}
/**
* Ungzip an input file into an output file.
* <p>
* The output file is created in the output folder, having the same name
* as the input file, minus the '.gz' extension.
*
* @param inputFile the input .gz file
* @param outputDir the output directory file.
* @throws IOException
* @throws FileNotFoundException
*
* @return The {@File} with the ungzipped content.
*/
private static File unGzip(final File inputFile, final File outputDir) throws FileNotFoundException, IOException {
LOG.info(String.format("Ungzipping %s to dir %s.", inputFile.getAbsolutePath(), outputDir.getAbsolutePath()));
final File outputFile = new File(outputDir, inputFile.getName().substring(0, inputFile.getName().length() - 3));
final GZIPInputStream in = new GZIPInputStream(new FileInputStream(inputFile));
final FileOutputStream out = new FileOutputStream(outputFile);
IOUtils.copy(in, out);
in.close();
out.close();
return outputFile;
}
发布于 2014-03-18 22:04:08
Archiver archiver = ArchiverFactory.createArchiver("tar", "gz");
archiver.extract(archiveFile, destDir);
依赖关系:
<dependency>
<groupId>org.rauschig</groupId>
<artifactId>jarchivelib</artifactId>
<version>0.5.0</version>
</dependency>
发布于 2011-09-24 05:17:44
我只是尝试了一堆建议的库(TrueZip,Apache Compress),但是没有成功。
以下是Apache Commons VFS的示例:
FileSystemManager fsManager = VFS.getManager();
FileObject archive = fsManager.resolveFile("tgz:file://" + fileName);
// List the children of the archive file
FileObject[] children = archive.getChildren();
System.out.println("Children of " + archive.getName().getURI()+" are ");
for (int i = 0; i < children.length; i++) {
FileObject fo = children[i];
System.out.println(fo.getName().getBaseName());
if (fo.isReadable() && fo.getType() == FileType.FILE
&& fo.getName().getExtension().equals("nxml")) {
FileContent fc = fo.getContent();
InputStream is = fc.getInputStream();
}
}
和maven依赖:
<dependency>
<groupId>commons-vfs</groupId>
<artifactId>commons-vfs</artifactId>
<version>1.0</version>
</dependency>
https://stackoverflow.com/questions/315618
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