java 压缩和解压缩文件详解编程语言

* 注意：此类中用到的压缩类ZipEntry等都来自于org.apache.tools包而非java.util。此包在ant.jar中有。 * * @author Tony public class FileUtil { protected static Logger log = LoggerFactory.getLogger(FileUtil.class); /** * 压缩文件 * @param inputFileName * 要压缩的文件或文件夹路径，例如：c://a.txt,c://a/ * @param outputFileName * 输出zip文件的路径，例如：c://a.zip public static void zip(String inputFileName, String outputFileName) throws Exception { ZipOutputStream out = new ZipOutputStream(new FileOutputStream( outputFileName)); zip(out, new File(inputFileName), ""); log.debug("压缩完成！"); out.closeEntry(); out.close(); /** * 压缩文件 * @param out * org.apache.tools.zip.ZipOutputStream * @param file * 待压缩的文件 * @param base * 压缩的根目录 private static void zip(ZipOutputStream out, File file, String base) throws Exception { if (file.isDirectory()) { File[] fl = file.listFiles(); base = base.length() == 0 ? "" : base + File.separator; for (int i = 0; i fl.length; i++) { zip(out, fl[i], base + fl[i].getName()); } else { out.putNextEntry(new ZipEntry(base)); log.debug("添加压缩文件：" + base); FileInputStream in = new FileInputStream(file); int b; while ((b = in.read()) != -1) { out.write(b); in.close(); /** * 解压zip文件 * @param zipFileName * 待解压的zip文件路径，例如：c://a.zip * @param outputDirectory * 解压目标文件夹,例如：c://a/ public static void unZip(String zipFileName, String outputDirectory) throws Exception { ZipFile zipFile = new ZipFile(zipFileName); try { Enumeration ? e = zipFile.getEntries(); ZipEntry zipEntry = null; createDirectory(outputDirectory, ""); while (e.hasMoreElements()) { zipEntry = (ZipEntry) e.nextElement(); log.debug("解压：" + zipEntry.getName()); if (zipEntry.isDirectory()) { String name = zipEntry.getName(); name = name.substring(0, name.length() - 1); File f = new File(outputDirectory + File.separator + name); f.mkdir(); log.debug("创建目录：" + outputDirectory + File.separator + name); } else { String fileName = zipEntry.getName(); fileName = fileName.replace(//, /); if (fileName.indexOf("/") != -1) { createDirectory(outputDirectory, fileName.substring(0, fileName.lastIndexOf("/"))); fileName = fileName.substring( fileName.lastIndexOf("/") + 1, fileName.length()); File f = new File(outputDirectory + File.separator + zipEntry.getName()); f.createNewFile(); InputStream in = zipFile.getInputStream(zipEntry); FileOutputStream out = new FileOutputStream(f); byte[] by = new byte[1024]; int c; while ((c = in.read(by)) != -1) { out.write(by, 0, c); in.close(); out.close(); } catch (Exception ex) { System.out.println(ex.getMessage()); } finally { zipFile.close(); log.debug("解压完成！");

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