Java压缩/解压.zip、.tar.gz、.tar.bz2(支持中文)

本文介绍Java压缩/解压.zip、.tar.gz、.tar.bz2的方式。

1. 对于zip文件：使用java.util.zip.ZipEntry 和 java.util.zip.ZipFile，通过设置Charset为StandardCharsets.UTF_8支持中文。
2. 对于.tar.gz、tgz文件：可以看做先用tar打包，再使用gz进行压缩。使用commons-compress包的TarArchiveInputStream和GzipCompressorInputStream。
3. 对于.tar.bz2文件：可以看做先用tar打包，再使用bz2进行压缩。使用commons-compress包的TarArchiveInputStream和BZip2CompressorInputStream。

在这里有个问题如果使用TarInputStream搭配jdk的 GZIPInputStream会产生乱码。而使用commons-compress包的TarArchiveInputStream和GzipCompressorInputStream则可解决乱码问题。

代码如下：

public class ZipUtil {

    private static final Logger LOG = LoggerFactory.getLogger(ZipUtil.class);

    private static final int BUFFER_SIZE = 1024 * 100;

    private ZipUtil() {
    }

    /**
     * 私有函数将文件集合压缩成tar包后返回
     *
     * @param files  要压缩的文件集合
     * @param target tar 输出流的目标文件
     * @return File  指定返回的目标文件
     */
    private static File pack(List<File> files, File target) throws IOException{
        try (FileOutputStream fos = new FileOutputStream(target)) {
            try (BufferedOutputStream bos = new BufferedOutputStream(fos, BUFFER_SIZE)) {
                try (TarArchiveOutputStream taos = new TarArchiveOutputStream(bos)) {
                    //解决文件名过长问题
                    taos.setLongFileMode(TarArchiveOutputStream.LONGFILE_GNU);
                    for (File file : files) {
                        taos.putArchiveEntry(new TarArchiveEntry(file));
                        try (FileInputStream fis = new FileInputStream(file)) {
                            IOUtils.copy(fis, taos);
                            taos.closeArchiveEntry();
                        }
                    }
                }
            }
        }
        return target;
    }

    /**
     * 将tar压缩成tar.gz文件
     *
     * @param list
     * @param outPutPath
     * @param fileName
     */
    public static File compress(List<File> list, String outPutPath, String fileName) throws IOException {
        File outPutFile = new File(outPutPath + File.separator + fileName + ".tar.gz");
        File tempTar = new File("temp.tar");
        try (FileInputStream fis = new FileInputStream(pack(list, tempTar))) {
            try (BufferedInputStream bis = new BufferedInputStream(fis, BUFFER_SIZE)) {
                try (FileOutputStream fos = new FileOutputStream(outPutFile)) {
                    try (GZIPOutputStream gzp = new GZIPOutputStream(fos)) {
                        int count;
                        byte[] data = new byte[BUFFER_SIZE];
                        while ((count = bis.read(data, 0, BUFFER_SIZE)) != -1) {
                            gzp.write(data, 0, count);
                        }
                    }
                }
            }
        }
        try {
            Files.deleteIfExists(tempTar.toPath());
        } catch (IOException e) {
            e.printStackTrace();
        }
        return outPutFile;
    }

    public static boolean decompress(String filePath, String outputDir, boolean isDeleted) {
        File file = new File(filePath);
        if (!file.exists()) {
            LOG.error("decompress file not exist.");
            return false;
        }
        try {
            if (filePath.endsWith(".zip")) {
                unZip(file, outputDir);
            }
            if (filePath.endsWith(".tar.gz") || filePath.endsWith(".tgz")) {
                decompressTarGz(file, outputDir);
            }
            if (filePath.endsWith(".tar.bz2")) {
                decompressTarBz2(file, outputDir);
            }
            filterFile(new File(outputDir));
            if (isDeleted) {
                FileUtils.deleteQuietly(file);
            }
            return true;
        } catch (IOException e) {
            LOG.error("decompress occur error.");
        }
        return false;
    }

    /**
     * 解压 .zip 文件
     *
     * @param file      要解压的zip文件对象
     * @param outputDir 要解压到某个指定的目录下
     * @throws IOException
     */
    public static void unZip(File file, String outputDir) throws IOException {
        try (ZipFile zipFile = new ZipFile(file, StandardCharsets.UTF_8)) {
            //创建输出目录
            createDirectory(outputDir, null);
            Enumeration<?> enums = zipFile.entries();
            while (enums.hasMoreElements()) {
                ZipEntry entry = (ZipEntry) enums.nextElement();
                if (entry.isDirectory()) {
                    //创建空目录
                    createDirectory(outputDir, entry.getName());
                } else {
                    try (InputStream in = zipFile.getInputStream(entry)) {
                        try (OutputStream out = new FileOutputStream(
                                new File(outputDir + File.separator + entry.getName()))) {
                            writeFile(in, out);
                        }
                    }
                }
            }
        }
    }

    public static void decompressTarGz(File file, String outputDir) throws IOException {
        try (TarArchiveInputStream tarIn = new TarArchiveInputStream(
                new GzipCompressorInputStream(
                        new BufferedInputStream(
                                new FileInputStream(file))))) {
            //创建输出目录
            createDirectory(outputDir, null);
            TarArchiveEntry entry = null;
            while ((entry = tarIn.getNextTarEntry()) != null) {
                //是目录
                if (entry.isDirectory()) {
                    //创建空目录
                    createDirectory(outputDir, entry.getName());
                } else {
                    //是文件
                    try (OutputStream out = new FileOutputStream(
                            new File(outputDir + File.separator + entry.getName()))) {
                        writeFile(tarIn, out);
                    }
                }
            }
        }

    }

    /**
     * 解压缩tar.bz2文件
     *
     * @param file      压缩包文件
     * @param outputDir 目标文件夹
     */
    public static void decompressTarBz2(File file, String outputDir) throws IOException {
        try (TarArchiveInputStream tarIn =
                     new TarArchiveInputStream(
                             new BZip2CompressorInputStream(
                                     new FileInputStream(file)))) {
            createDirectory(outputDir, null);
            TarArchiveEntry entry;
            while ((entry = tarIn.getNextTarEntry()) != null) {
                if (entry.isDirectory()) {
                    createDirectory(outputDir, entry.getName());
                } else {
                    try (OutputStream out = new FileOutputStream(
                            new File(outputDir + File.separator + entry.getName()))) {
                        writeFile(tarIn, out);
                    }
                }
            }
        }
    }

    /**
     * 写文件
     *
     * @param in
     * @param out
     * @throws IOException
     */
    public static void writeFile(InputStream in, OutputStream out) throws IOException {
        int length;
        byte[] b = new byte[BUFFER_SIZE];
        while ((length = in.read(b)) != -1) {
            out.write(b, 0, length);
        }
    }

    /**
     * 创建目录
     *
     * @param outputDir
     * @param subDir
     */
    public static void createDirectory(String outputDir, String subDir) {
        File file = new File(outputDir);
        //子目录不为空
        if (!(subDir == null || subDir.trim().equals(""))) {
            file = new File(outputDir + File.separator + subDir);
        }
        if (!file.exists()) {
            if (!file.getParentFile().exists()) {
                file.getParentFile().mkdirs();
            }
            file.mkdirs();
        }
    }

    /**
     * 删除Mac压缩再解压产生的 __MACOSX 文件夹和 .开头的其他文件
     *
     * @param filteredFile
     */
    public static void filterFile(File filteredFile) {
        if (filteredFile != null) {
            File[] files = filteredFile.listFiles();
            for (File file : files) {
                if (file.getName().startsWith(".") ||
                        (file.isDirectory() && file.getName().equals("__MACOSX"))) {
                    FileUtils.deleteQuietly(file);
                }
            }
        }
    }
}

代码地址： https://github.com/morethink/code/blob/master/java/tools/src/main/java/cn/morethink/tools/util/ZipUtil.java

参考文档：

1. commons-compress官方实例