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Java壓縮類庫的使用-2.JDK中的打包、壓縮類庫
inkfish原創，請勿商業性質轉載，轉載請注明來源（https://blog.csdn.net/inkfish）。
這裏忽略了jar，因為jar實質上屬於zip壓縮。（來源：https://blog.csdn.net/inkfish）
JDK ZLIB壓縮：（來源：https://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壓縮（僅適用於壓縮一個文件）：（來源：https://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壓縮：（來源：https://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包為Apache common io，項目首頁：https://commons.apache.org/io/ ，提供了IO操作的很多方便的方法，基於Apache 2.0 License，可用於商業用途。（來源：https://blog.csdn.net/inkfish）
最後更新：2017-04-02 04:01:43