blocks|key|1467189|text|如何将这个API用于tar文件，这个other+one包含在BZIP2的Ant中和standard+one的GZIP中？|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1467190|entityMap|0|LINK|mutability|MUTABLE|url|http://www.trustice.com/java/tar/|1|http://www.kohsuke.org/bzip2/|2|http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/GZIPInputStream.html^0|5|3|0|I|9|1|15|C|2|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]|$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]|N|$5|G|H|I|C|$J|O]]]]

What about using this <a href="http://www.trustice.com/java/tar/" rel="nofollow noreferrer">API</a> for tar files, this <a href="http://www.kohsuke.org/bzip2/" rel="nofollow noreferrer">other one</a> included inside Ant for BZIP2 and the <a href="http://java.sun.com/j2se/1.4.2/docs/api/java/util/zip/GZIPInputStream.html" rel="nofollow noreferrer">standard one</a> for GZIP?

blocks|key|1682586|text|除了gzip和bzip2之外，Apache+Commons+Compress+API还支持tar，最初基于ICE+Engineering+Java+Tar+Package，它既是一个API，也是一个独立工具。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1682587|entityMap|0|LINK|mutability|MUTABLE|url|http://commons.apache.org/compress/|1|http://www.trustice.com/java/tar/^0|F|R|0|1H|W|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

In addition to gzip and bzip2, <a href="http://commons.apache.org/compress/" rel="nofollow">Apache Commons Compress API</a> has also tar support, originally based on <a href="http://www.trustice.com/java/tar/" rel="nofollow">ICE Engineering Java Tar Package</a>, which is both API and standalone tool.

blocks|key|1467314|text|我只是尝试了一堆建议的库(TrueZip，Apache+Compress)，但是没有成功。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1467315|以下是Apache+Commons+VFS的示例：|1467316|FileSystemManager+fsManager+=+VFS.getManager();
FileObject+archive+=+fsManager.resolveFile("tgz:file://"+%2B+fileName);

//+List+the+children+of+the+archive+file
FileObject[]+children+=+archive.getChildren();
System.out.println("Children+of+"+%2B+archive.getName().getURI()%2B"+are+");
for+(int+i+=+0;+i+<+children.length;+i%2B%2B)+{
++++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();
++++}
}|code-block|syntax|javascript|1467317|和maven依赖：|1467318|++++<dependency>
++++++<groupId>commons-vfs</groupId>
++++++<artifactId>commons-vfs</artifactId>
++++++<version>1.0</version>
++++</dependency>|1467319|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I just tried a bunch of the suggested libs (TrueZip, Apache Compress), but no luck.

Here is an example with Apache Commons VFS:

<pre><code>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 &lt; children.length; i++) {
 FileObject fo = children[i];
 System.out.println(fo.getName().getBaseName());
 if (fo.isReadable() &amp;&amp; fo.getType() == FileType.FILE
 &amp;&amp; fo.getName().getExtension().equals("nxml")) {
 FileContent fc = fo.getContent();
 InputStream is = fc.getInputStream();
 }
}
</code></pre>

And the maven dependency:

<pre><code> &lt;dependency&gt;
 &lt;groupId&gt;commons-vfs&lt;/groupId&gt;
 &lt;artifactId&gt;commons-vfs&lt;/artifactId&gt;
 &lt;version&gt;1.0&lt;/version&gt;
 &lt;/dependency&gt;
</code></pre>

blocks|key|1682682|text|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。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1682683|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。|1682684|好好享受吧。|1682685|/**+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+%25s+to+dir+%25s.",+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+%25s.",+outputFile.getAbsolutePath()));
++++++++++++if+(!outputFile.exists())+{
++++++++++++++++LOG.info(String.format("Attempting+to+create+output+directory+%25s.",+outputFile.getAbsolutePath()));
++++++++++++++++if+(!outputFile.mkdirs())+{
++++++++++++++++++++throw+new+IllegalStateException(String.format("Couldn't+create+directory+%25s.",+outputFile.getAbsolutePath()));
++++++++++++++++}
++++++++++++}
++++++++}+else+{
++++++++++++LOG.info(String.format("Creating+output+file+%25s.",+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.
+*+
+*+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+%25s+to+dir+%25s.",+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;
}|code-block|syntax|javascript|1682686|entityMap|0|LINK|mutability|MUTABLE|url|http://mvnrepository.com/artifact/org.apache.commons/commons-compress/1.2^0|X|21|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|10|8|@]|9|@]|C|$K|L]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

You can do this with the Apache Commons Compress library. You can download the 1.2 version from <a href="http://mvnrepository.com/artifact/org.apache.commons/commons-compress/1.2" rel="noreferrer">http://mvnrepository.com/artifact/org.apache.commons/commons-compress/1.2</a>. 

Here are two methods: one that unzips a file and another one that untars it. So, for a file
&lt;fileName&gt;tar.gz, you need to first unzip it and after that untar it. Please note that the tar archive may contain folders as well, case in which they need to be created on the local filesystem.

Enjoy.

<pre><code>/** 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&lt;File&gt; 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&lt;File&gt; untaredFiles = new LinkedList&lt;File&gt;();
 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.
 * &lt;p&gt;
 * 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;
}
</code></pre>

blocks|key|1467432|text|Archiver+archiver+=+ArchiverFactory.createArchiver("tar",+"gz");
archiver.extract(archiveFile,+destDir);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1467433|依赖关系：|unstyled|1467434|+<dependency>
++++++++<groupId>org.rauschig</groupId>
++++++++<artifactId>jarchivelib</artifactId>
++++++++<version>0.5.0</version>
</dependency>|1467435|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>Archiver archiver = ArchiverFactory.createArchiver("tar", "gz");
archiver.extract(archiveFile, destDir);
</code></pre>

Dependency:

<pre><code> &lt;dependency&gt;
 &lt;groupId&gt;org.rauschig&lt;/groupId&gt;
 &lt;artifactId&gt;jarchivelib&lt;/artifactId&gt;
 &lt;version&gt;0.5.0&lt;/version&gt;
&lt;/dependency&gt;
</code></pre>

blocks|key|1682766|text|这是Dan+Borza的一个基于this+earlier+answer的版本，它使用了Apache+Commons+Compress和Java+NIO+(即路径而不是文件)。它还在一个流中进行解压缩和解压缩，因此不需要创建中间文件。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1682767|public+static+void+unTarGz(+Path+pathInput,+Path+pathOutput+)+throws+IOException+{
++++TarArchiveInputStream+tararchiveinputstream+=
++++++++new+TarArchiveInputStream(
++++++++++++new+GzipCompressorInputStream(
++++++++++++++++new+BufferedInputStream(+Files.newInputStream(+pathInput+)+)+)+);

++++ArchiveEntry+archiveentry+=+null;
++++while(+(archiveentry+=+tararchiveinputstream.getNextEntry())+!=+null+)+{
++++++++Path+pathEntryOutput+=+pathOutput.resolve(+archiveentry.getName()+);
++++++++if(+archiveentry.isDirectory()+)+{
++++++++++++if(+!Files.exists(+pathEntryOutput+)+)
++++++++++++++++Files.createDirectory(+pathEntryOutput+);
++++++++}
++++++++else
++++++++++++Files.copy(+tararchiveinputstream,+pathEntryOutput+);
++++}

++++tararchiveinputstream.close();
}|code-block|syntax|javascript|1682768|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/7556307/207245|1|https://mvnrepository.com/artifact/org.apache.commons/commons-compress/1.18^0|G|J|0|17|N|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]]]

Here's a version based on <a href="https://stackoverflow.com/a/7556307/207245">this earlier answer</a> by Dan Borza that uses <a href="https://mvnrepository.com/artifact/org.apache.commons/commons-compress/1.18" rel="nofollow noreferrer">Apache Commons Compress</a> and Java NIO (i.e. Path instead of File). It also does the uncompression and untarring in one stream so there's no intermediate file creation.

<pre><code>public static void unTarGz( Path pathInput, Path pathOutput ) throws IOException {
 TarArchiveInputStream tararchiveinputstream =
 new TarArchiveInputStream(
 new GzipCompressorInputStream(
 new BufferedInputStream( Files.newInputStream( pathInput ) ) ) );

 ArchiveEntry archiveentry = null;
 while( (archiveentry = tararchiveinputstream.getNextEntry()) != null ) {
 Path pathEntryOutput = pathOutput.resolve( archiveentry.getName() );
 if( archiveentry.isDirectory() ) {
 if( !Files.exists( pathEntryOutput ) )
 Files.createDirectory( pathEntryOutput );
 }
 else
 Files.copy( tararchiveinputstream, pathEntryOutput );
 }

 tararchiveinputstream.close();
}
</code></pre>

问如何在Java中提取tar文件？
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