Java压缩类库的使用-4.Apache commons compress中的打包、压缩类库

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本文详细介绍了如何使用 Apache Commons Compress 库进行文件压缩和解压缩操作，包括 BZIP2、GZIP、ZIP、AR、CPIO 和 TAR 等多种格式。每个示例都提供了具体的 Java 代码实现。

　　inkfish原创，请勿商业性质转载，转载请注明来源（http://blog.youkuaiyun.com/inkfish ）。

Apache commons compress BZIP2压缩：

package study.inkfish.compress; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import org.apache.commons.compress.compressors.gzip.GzipCompressorInputStream; import org.apache.commons.compress.compressors.gzip.GzipCompressorOutputStream; import org.apache.commons.io.FilenameUtils; import org.apache.commons.io.IOUtils; public class CommonsBZip2Compress extends Compress { @Override protected void doCompress(File srcFile, File destFile) throws IOException { OutputStream out = null; InputStream is = null; try { is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen); out = new GzipCompressorOutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen)); IOUtils.copy(is, out); } finally { IOUtils.closeQuietly(is); IOUtils.closeQuietly(out); } } @Override protected void doDecompress(File srcFile, File destDir) throws IOException { InputStream is = null; OutputStream os = null; try { File destFile = new File(destDir, FilenameUtils.getBaseName(srcFile.toString())); is = new GzipCompressorInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen)); os = new BufferedOutputStream(new FileOutputStream(destFile), bufferLen); IOUtils.copy(is, os); } finally { IOUtils.closeQuietly(is); IOUtils.closeQuietly(os); } } }

Apache commons compress GZIP压缩：

package study.inkfish.compress; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream; import org.apache.commons.compress.compressors.bzip2.BZip2CompressorOutputStream; import org.apache.commons.io.FilenameUtils; import org.apache.commons.io.IOUtils; public class CommonsGZIPCompress extends Compress { @Override protected void doCompress(File srcFile, File destFile) throws IOException { OutputStream out = null; InputStream is = null; try { is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen); out = new BZip2CompressorOutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen)); IOUtils.copy(is, out); } finally { IOUtils.closeQuietly(is); IOUtils.closeQuietly(out); } } @Override protected void doDecompress(File srcFile, File destDir) throws IOException { InputStream is = null; OutputStream os = null; try { File destFile = new File(destDir, FilenameUtils.getBaseName(srcFile.toString())); is = new BZip2CompressorInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen)); os = new BufferedOutputStream(new FileOutputStream(destFile), bufferLen); IOUtils.copy(is, os); } finally { IOUtils.closeQuietly(is); IOUtils.closeQuietly(os); } } }

Apache commons compress ZIP压缩：

package study.inkfish.compress; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import org.apache.commons.compress.archivers.zip.ZipArchiveEntry; import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream; import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream; import org.apache.commons.io.IOUtils; public class CommonsZipCompress extends Compress { /**用于单文件压缩*/ @Override protected void doCompress(File srcFile, File destFile) throws IOException { ZipArchiveOutputStream out = null; InputStream is = null; try { is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen); out = new ZipArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen)); ZipArchiveEntry entry = new ZipArchiveEntry(srcFile.getName()); entry.setSize(srcFile.length()); out.putArchiveEntry(entry); IOUtils.copy(is, out); out.closeArchiveEntry(); } finally { IOUtils.closeQuietly(is); IOUtils.closeQuietly(out); } } @Override protected void doDecompress(File srcFile, File destDir) throws IOException { ZipArchiveInputStream is = null; try { is = new ZipArchiveInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen)); ZipArchiveEntry entry = null; while ((entry = is.getNextZipEntry()) != null) { if (entry.isDirectory()) { File directory = new File(destDir, entry.getName()); directory.mkdirs(); } else { OutputStream os = null; try { os = new BufferedOutputStream( new FileOutputStream(new File(destDir, entry.getName())), bufferLen); IOUtils.copy(is, os); } finally { IOUtils.closeQuietly(os); } } } } finally { IOUtils.closeQuietly(is); } } }

Apache commons compress AR打包：

package study.inkfish.compress; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import org.apache.commons.compress.archivers.ar.ArArchiveEntry; import org.apache.commons.compress.archivers.ar.ArArchiveInputStream; import org.apache.commons.compress.archivers.ar.ArArchiveOutputStream; import org.apache.commons.io.IOUtils; public class CommonsArCompress extends Compress { @Override protected void doCompress(File srcFile, File destFile) throws IOException { ArArchiveOutputStream zout = null; InputStream is = null; try { is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen); zout = new ArArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen)); zout.putArchiveEntry(new ArArchiveEntry(srcFile, srcFile.getName())); IOUtils.copy(is, zout); zout.closeArchiveEntry(); } finally { IOUtils.closeQuietly(is); IOUtils.closeQuietly(zout); } } @Override protected void doDecompress(File srcFile, File destDir) throws IOException { ArArchiveInputStream is = null; try { is = new ArArchiveInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen)); ArArchiveEntry entry = null; while ((entry = is.getNextArEntry()) != null) { if (entry.isDirectory()) { File directory = new File(destDir, entry.getName()); directory.mkdirs(); } else { BufferedOutputStream bos = null; try { byte[] buffer = new byte[bufferLen]; bos = new BufferedOutputStream(new FileOutputStream( new File(destDir, entry.getName())), bufferLen); int len; long size = entry.getSize(); while (size > 0) { if (size < bufferLen) { len = is.read(buffer, 0, (int) size); size -= len; } else { len = is.read(buffer); size -= len; } bos.write(buffer, 0, len); } } finally { IOUtils.closeQuietly(bos); } } } } finally { IOUtils.closeQuietly(is); } } }

Apache commons compress CPIO打包：

package study.inkfish.compress; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import org.apache.commons.compress.archivers.cpio.CpioArchiveEntry; import org.apache.commons.compress.archivers.cpio.CpioArchiveInputStream; import org.apache.commons.compress.archivers.cpio.CpioArchiveOutputStream; import org.apache.commons.io.IOUtils; public class CommonsCPIOCompress extends Compress { @Override protected void doCompress(File srcFile, File destFile) throws IOException { CpioArchiveOutputStream out = null; InputStream is = null; try { is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen); out = new CpioArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen)); out.putArchiveEntry(new CpioArchiveEntry(srcFile, srcFile.getName())); IOUtils.copy(is, out); out.closeArchiveEntry(); } finally { IOUtils.closeQuietly(is); IOUtils.closeQuietly(out); } } @Override protected void doDecompress(File srcFile, File destDir) throws IOException { CpioArchiveInputStream is = null; try { is = new CpioArchiveInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen)); CpioArchiveEntry entry = null; while ((entry = is.getNextCPIOEntry()) != null) { if (entry.isDirectory()) { File directory = new File(destDir, entry.getName()); directory.mkdirs(); } else { BufferedOutputStream bos = null; try { byte[] buffer = new byte[bufferLen]; bos = new BufferedOutputStream(new FileOutputStream( new File(destDir, entry.getName())), bufferLen); int len; long size = entry.getSize(); while (size > 0) { if (size < bufferLen) { len = is.read(buffer, 0, (int) size); size -= len; } else { len = is.read(buffer); size -= len; } bos.write(buffer, 0, len); } } finally { IOUtils.closeQuietly(bos); } } } } finally { IOUtils.closeQuietly(is); } } }

Apache commons compress TAR打包：

package study.inkfish.compress; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; 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 org.apache.commons.io.IOUtils; public class CommonsTarCompress extends Compress { @Override protected void doCompress(File srcFile, File destFile) throws IOException { TarArchiveOutputStream out = null; InputStream is = null; try { is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen); out = new TarArchiveOutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen)); TarArchiveEntry entry = new TarArchiveEntry(srcFile.getName()); entry.setSize(srcFile.length()); out.putArchiveEntry(entry); IOUtils.copy(is, out); out.closeArchiveEntry(); } finally { IOUtils.closeQuietly(is); IOUtils.closeQuietly(out); } } @Override protected void doDecompress(File srcFile, File destDir) throws IOException { TarArchiveInputStream is = null; try { is = new TarArchiveInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen)); TarArchiveEntry entry = null; while ((entry = is.getNextTarEntry()) != null) { if (entry.isDirectory()) { File directory = new File(destDir, entry.getName()); directory.mkdirs(); } else { BufferedOutputStream bos = null; try { byte[] buffer = new byte[bufferLen]; bos = new BufferedOutputStream(new FileOutputStream( new File(destDir, entry.getName())), bufferLen); int len; long size = entry.getSize(); while (size > 0) { if (size < bufferLen) { len = is.read(buffer, 0, (int) size); size -= len; } else { len = is.read(buffer); size -= len; } bos.write(buffer, 0, len); } } finally { IOUtils.closeQuietly(bos); } } } } finally { IOUtils.closeQuietly(is); } } }

　　注：org.apache.commons.io包为Apache common io，项目首页：http://commons.apache.org/io/ ，提供了IO操作的很多方便的方法，基于Apache 2.0 License，可用于商业用途。