edited: apache commons-compress 之tar压缩文件夹的示例

package zcom.pekall.backuprestore.util; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import org.apache.commons.compress.archivers.tar.TarArchiveEntry; import org.apache.commons.compress.archivers.tar.TarArchiveInputStream; import org.apache.commons.compress.archivers.tar.TarArchiveOutputStream; import android.util.Log; public class TarUtil { private static final String TAG = TarUtil.class.getName(); private static final int BUFFER = 1024; private static String mCompressSrcParentPath = ""; /** * usage: compress("/mnt/sdcard/Download", "/mnt/sdcard/Download.tar"); * * @param srcAbsolutePath can be path of file or directory * @param destAbsolutePath suggest ending with a ".tar" suffix */ public static void compress(String srcAbsolutePath, String destAbsolutePath) { compress(new File(srcAbsolutePath), destAbsolutePath); } /** * @param srcFile can be file or directory * @param destAbsolutePath suggest ending with a ".tar" suffix */ public static void compress(File srcFile, String destAbsolutePath) { File destFile = new File(destAbsolutePath); try { if (!destFile.exists()) { destFile.createNewFile(); } TarArchiveOutputStream taos = new TarArchiveOutputStream(new FileOutputStream(destFile)); mCompressSrcParentPath = srcFile.getParent(); compress(srcFile, taos); taos.flush(); taos.close(); } catch (IOException e) { Log.e(TAG, e.toString()); } } private static void compress(File file, TarArchiveOutputStream taos) { if (file.isDirectory()) { compressDir(file, taos); } else { compressFile(file, taos); } } private static void compressDir(File dir, TarArchiveOutputStream taos) { File[] files = dir.listFiles(); if (files != null) { if (files.length == 0) { try { taos.putArchiveEntry(createTarArchiveEntry(dir)); taos.closeArchiveEntry(); } catch (IOException e) { Log.e(TAG, e.toString()); } } else { for (File file : files) { compress(file, taos); } } } } private static TarArchiveEntry createTarArchiveEntry(File file) { /** 不能用绝对路径，举例对于压缩/mnt/sdcard下的abc文件，如果不做截短，压缩文件里面会在abc外面套mnt和sdcard两层空壳，所以要把abc所属路径的/mnt/sdcard去掉 **/ return new TarArchiveEntry(file, file.getPath().replace(mCompressSrcParentPath, "")); } private static void compressFile(File file, TarArchiveOutputStream taos) { try { BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file)); taos.putArchiveEntry(createTarArchiveEntry(file)); int count; byte data[] = new byte[BUFFER]; while ((count = bis.read(data, 0, BUFFER)) != -1) { taos.write(data, 0, count); } bis.close(); taos.closeArchiveEntry(); } catch (IOException e) { Log.e(TAG, e.toString()); } } /** usage: extract("/mnt/sdcard/Download.tar", "/mnt/sdcard") **/ public static void extract(String srcPath, String destPath) { File srcFile = new File(srcPath); if (srcFile.isFile()) { extract(srcFile, destPath); } } public static void extract(File srcFile, String destPath) { extract(srcFile, new File(destPath)); } public static void extract(File srcFile, File destFile) { try { TarArchiveInputStream tais = new TarArchiveInputStream(new FileInputStream(srcFile)); extract(destFile, tais); tais.close(); } catch (IOException e) { Log.e(TAG, e.toString()); } } private static void extract(File destFile, TarArchiveInputStream tais) { TarArchiveEntry entry = null; try { while ((entry = tais.getNextTarEntry()) != null) { String dirPath = destFile.getPath() + File.separator + entry.getName(); File dirFile = new File(dirPath); createParentDirRecursively(dirFile); if (entry.isDirectory()) { dirFile.mkdirs(); } else { extractFile(dirFile, tais); } } } catch (IOException e) { Log.e(TAG, e.toString()); } } private static void extractFile(File destFile, TarArchiveInputStream tais) { BufferedOutputStream bos; try { bos = new BufferedOutputStream(new FileOutputStream(destFile)); int count; byte data[] = new byte[BUFFER]; while ((count = tais.read(data, 0, BUFFER)) != -1) { bos.write(data, 0, count); } bos.close(); } catch (FileNotFoundException e) { Log.e(TAG, e.toString()); } catch (IOException e) { Log.e(TAG, e.toString()); } } private static void createParentDirRecursively(File dirFile) { File parentFile = dirFile.getParentFile(); if (!parentFile.exists()) { createParentDirRecursively(parentFile); parentFile.mkdir(); } } }