Java压缩类库的使用-3.Apache Ant中的打包、压缩类库

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

　　这里需要关注的是BZIP2格式，经过测试，总是无法正确压缩，原因未知，而apache commons bzip2格式的文件压缩正常。（来源：http://blog.csdn.net/inkfish）

Ant ZIP压缩：（来源：http://blog.csdn.net/inkfish）

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 java.util.Enumeration;import org.apache.commons.io.IOUtils;import org.apache.tools.zip.ZipEntry;import org.apache.tools.zip.ZipFile;import org.apache.tools.zip.ZipOutputStream;public class AntZipCompress extends Compress {@Overrideprotected void doCompress(File srcFile, File destFile) throws IOException {ZipOutputStream zout = null;InputStream is = null;try {is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen);zout = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen));zout.putNextEntry(new ZipEntry(srcFile.getName()));IOUtils.copy(is, zout);zout.closeEntry();} finally {IOUtils.closeQuietly(is);IOUtils.closeQuietly(zout);}}@Overrideprotected void doDecompress(File srcFile, File destDir) throws IOException {ZipFile zipFile = new ZipFile(srcFile);try {@SuppressWarnings("unchecked")Enumeration<ZipEntry> enums = zipFile.getEntries();while (enums.hasMoreElements()) {ZipEntry entry = enums.nextElement();InputStream is = new BufferedInputStream(zipFile.getInputStream(entry), bufferLen);OutputStream os = null;try {os = new BufferedOutputStream(new FileOutputStream(new File(destDir, entry.getName())), bufferLen);IOUtils.copy(is, os);} finally {IOUtils.closeQuietly(is);IOUtils.closeQuietly(os);}}} finally {ZipFile.closeQuietly(zipFile);}}}

Ant BZIP压缩：（来源：http://blog.csdn.net/inkfish）

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.io.FilenameUtils;import org.apache.commons.io.IOUtils;import org.apache.tools.bzip2.CBZip2InputStream;import org.apache.tools.bzip2.CBZip2OutputStream;public class AntBzip2Compress extends Compress {/**运行异常，无法正确打开*/@Overrideprotected void doCompress(File srcFile, File destFile) throws IOException {OutputStream out = null;InputStream is = null;try {is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen);out = new CBZip2OutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen));IOUtils.copy(is, out);} finally {IOUtils.closeQuietly(is);IOUtils.closeQuietly(out);}}@Overrideprotected 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 CBZip2InputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen));os = new BufferedOutputStream(new FileOutputStream(destFile), bufferLen);IOUtils.copy(is, os);} finally {IOUtils.closeQuietly(is);IOUtils.closeQuietly(os);}}}

Ant TAR打包：（来源：http://blog.csdn.net/inkfish）

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.io.IOUtils;import org.apache.tools.tar.TarEntry;import org.apache.tools.tar.TarInputStream;import org.apache.tools.tar.TarOutputStream;public class AntTarCompress extends Compress {@Overrideprotected void doCompress(File srcFile, File destFile) throws IOException {TarOutputStream out = null;InputStream is = null;try {is = new BufferedInputStream(new FileInputStream(srcFile), bufferLen);out = new TarOutputStream(new BufferedOutputStream(new FileOutputStream(destFile), bufferLen));TarEntry entry = new TarEntry(srcFile.getName());entry.setSize(srcFile.length());out.putNextEntry(entry);IOUtils.copy(is, out);out.closeEntry();} finally {IOUtils.closeQuietly(is);IOUtils.closeQuietly(out);}}@Overrideprotected void doDecompress(File srcFile, File destDir) throws IOException {TarInputStream is = null;try {is = new TarInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen));TarEntry entry = null;while ((entry = is.getNextEntry()) != null) {if (entry.isDirectory()) {File directory = new File(destDir, entry.getName());directory.mkdirs();} else {BufferedOutputStream bos = null;try {byte[] buffer = new byte[1024 * 512];//512k bufferbos = new BufferedOutputStream(new FileOutputStream(new File(destDir, entry.getName())), buffer.length);int len;long size = entry.getSize();while (size > 0) {if (size < buffer.length) {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。（来源：http://blog.csdn.net/inkfish）