Java压缩类库的使用-2.JDK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）。

　　这里忽略了jar，因为jar实质上属于zip压缩。（来源：http://blog.csdn.net/inkfish）

JDK ZLIB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.zip.DeflaterOutputStream;import java.util.zip.InflaterInputStream;import org.apache.commons.io.FilenameUtils;import org.apache.commons.io.IOUtils;public class JdkZLIBCompress extends Compress {@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 DeflaterOutputStream(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 InflaterInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen));os = new BufferedOutputStream(new FileOutputStream(destFile), bufferLen);IOUtils.copy(is, os);} finally {IOUtils.closeQuietly(is);IOUtils.closeQuietly(os);}}}

JDK ZIP压缩（仅适用于压缩一个文件）：（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.zip.ZipEntry;import java.util.zip.ZipInputStream;import java.util.zip.ZipOutputStream;import org.apache.commons.io.IOUtils;public class JdkZipCompress 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 {ZipInputStream is = null;try {is = new ZipInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen));ZipEntry entry = null;while ((entry = is.getNextEntry()) != null) {if (entry.isDirectory()) {File directory = new File(destDir, entry.getName());directory.mkdirs();is.closeEntry();} else {OutputStream os = null;try {os = new BufferedOutputStream(new FileOutputStream(new File(destDir, entry.getName())), bufferLen);IOUtils.copy(is, os);} finally {IOUtils.closeQuietly(os);}is.closeEntry();}}} finally {IOUtils.closeQuietly(is);}}}

JDK GZIP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.zip.GZIPInputStream;import java.util.zip.GZIPOutputStream;import org.apache.commons.io.FilenameUtils;import org.apache.commons.io.IOUtils;public class JdkGZIPCompress extends Compress {@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 GZIPOutputStream(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 GZIPInputStream(new BufferedInputStream(new FileInputStream(srcFile), bufferLen));os = new BufferedOutputStream(new FileOutputStream(destFile), bufferLen);IOUtils.copy(is, os);} finally {IOUtils.closeQuietly(is);IOUtils.closeQuietly(os);}}}

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）