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 {
@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 DeflaterOutputStream(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 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 {
@Override
protected 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);
}
}
@Override
protected 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 {
@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 GZIPOutputStream(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 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）