好的，我终于弄清楚了，这是我的代码，以防将来对任何人有帮助。它是用Java使用apache commons io和compress库编写的。
File dir = new File("directory/of/.tar.gz/files/here");File listDir[] = dir.listFiles();if (listDir.length!=0){ for (File i:listDir){ if (i.isDirectory()){ break; } String fileName = i.toString(); String tarFileName = fileName +".tar"; FileInputStream instream= new FileInputStream(fileName); GZIPInputStream ginstream =new GZIPInputStream(instream); FileOutputStream outstream = new FileOutputStream(tarFileName); byte[] buf = new byte[1024]; int len; while ((len = ginstream.read(buf)) > 0) { outstream.write(buf, 0, len); } ginstream.close(); outstream.close(); //There should now be tar files in the directory //extract specific files from tar TarArchiveInputStream myTarFile=new TarArchiveInputStream(new FileInputStream(tarFileName)); TarArchiveEntry entry = null; int offset; FileOutputStream outputFile=null; //read every single entry in TAR file while ((entry = myTarFile.getNextTarEntry()) != null) { //the following two lines remove the .tar.gz extension for the folder name String fileName = i.getName().substring(0, i.getName().lastIndexOf('.')); fileName = fileName.substring(0, fileName.lastIndexOf('.')); File outputDir = new File(i.getParent() + "/" + fileName + "/" + entry.getName()); if(! outputDir.getParentFile().exists()){ outputDir.getParentFile().mkdirs(); } //if the entry in the tar is a directory, it needs to be created, only files can be extracted if(entry.isDirectory){ outputDir.mkdirs(); }else{ byte[] content = new byte[(int) entry.getSize()]; offset=0; myTarFile.read(content, offset, content.length - offset); outputFile=new FileOutputStream(outputDir); IOUtils.write(content,outputFile); outputFile.close(); } } //close and delete the tar files, leaving the original .tar.gz and the extracted folders myTarFile.close(); File tarFile = new File(tarFileName); tarFile.delete(); }}
