如何用Java创建一个. tar.gz文件，保持相同的文件夹/目录结构

Question

我希望创建一个.tar。以下文件夹/目录结构的gz文件，同时保留相同的文件夹/目录

ParentDir\
    ChildDir1\
        -file1
    ChildDir2\
        -file2
        -file3
    ChildDir3\
        -file4
        -file5

然而，我只能创建所有文件的. tar.gz，没有文件夹/目录结构。即:ParentDir.tar.gz

    ParentDir\
        -file1
        -file2
        -file3
        -file4
        -file5

使用Compress目录中用户接受的答案tar.gzCommons Compress，我有以下代码：

public void exportStaticFilesTar(String appID) throws, Exception {
        
        FileOutputStream fOut = null;
        BufferedOutputStream bOut = null;
        GzipCompressorOutputStream gzOut = null;
        TarArchiveOutputStream tOut = null;

        try {
            String filename = "ParentDir.tar.gz"

            //"parent/childDirToCompress/"
            String path = "<path to ParentDir>";

            fOut = new FileOutputStream(new File(filename));
            bOut = new BufferedOutputStream(fOut);
            gzOut = new GzipCompressorOutputStream(bOut);
            tOut = new TarArchiveOutputStream(gzOut);
            
            addFileToTarGz(tOut, path, "");
        } catch (Exception e) {
            log.error("Error creating .tar.gz: " +e);
        } finally {
            tOut.finish();
            tOut.close();
            gzOut.close();
            bOut.close();
            fOut.close();
        }
        
        //Download the file locally
        
    }

    private void addFileToTarGz(TarArchiveOutputStream tOut, String path, String base) throws IOException {
        File f = new File(path);
        String entryName = base + f.getName();
        TarArchiveEntry tarEntry = new TarArchiveEntry(f, entryName);
        tOut.putArchiveEntry(tarEntry);
        if (f.isFile()) {
            IOUtils.copy(new FileInputStream(f), tOut);
            tOut.closeArchiveEntry();
        } else {
            tOut.closeArchiveEntry();
            File[] children = f.listFiles();
            if (children != null) {
                for (File child : children) {
                    addFileToTarGz(tOut, child.getAbsolutePath(), entryName + "/");
                }
            }
        }
    }

有人可以建议，我如何修改当前代码以保留文件夹/目录结构，以创建.tar.gz文件。谢谢！

Answer 1

使用请求中提到的代码，我能够在我的linux系统上生成一个成功的压缩文件。

您可以通过更改用户路径和需要压缩的根文件夹来进行复制。

public static void createTarGZ() throws FileNotFoundException, IOException
    {
        String sourceDirectoryPath = null;
        String destinationTarGzPath = null;
        FileOutputStream fileOutputStream = null;
        BufferedOutputStream bufferedOutputStream = null;
        GzipCompressorOutputStream gzOutpuStream = null;
        TarArchiveOutputStream tarArchiveOutputStream = null;

        String basePath = "/home/saad/CompressionTest/";

        try
        {

            sourceDirectoryPath = basePath + "asterisk";
            destinationTarGzPath = basePath + "asterisk.tar.gz";

            fileOutputStream = new FileOutputStream(new File(destinationTarGzPath));
            bufferedOutputStream = new BufferedOutputStream(fileOutputStream);
            gzOutpuStream = new GzipCompressorOutputStream(bufferedOutputStream);
            tarArchiveOutputStream = new TarArchiveOutputStream(gzOutpuStream);

            addFileToTarGz(tarArchiveOutputStream, sourceDirectoryPath, "");
        }
        finally
        {
            tarArchiveOutputStream.finish();
            tarArchiveOutputStream.close();
            gzOutpuStream.close();
            bufferedOutputStream.close();
            fileOutputStream.close();
        }
    }

    private static void addFileToTarGz(TarArchiveOutputStream tarOutputStream, String path, String base) throws IOException
    {
        File fileToCompress = new File(path);

        String entryName = base + fileToCompress.getName();

        TarArchiveEntry tarEntry = new TarArchiveEntry(fileToCompress, entryName);

        tarOutputStream.putArchiveEntry(tarEntry);

        // If its a file, simply add it
        if (fileToCompress.isFile())
        {
            IOUtils.copy(new FileInputStream(fileToCompress), tarOutputStream);
            tarOutputStream.closeArchiveEntry();
        }
        // If its a folder then add all its contents
        else
        {
            tarOutputStream.closeArchiveEntry();
            File[] children = fileToCompress.listFiles();

            if (children != null)
            {
                // add every file/folder recursively to the tar
                for (File child : children)
                {
                    addFileToTarGz(tarOutputStream, child.getAbsolutePath(), entryName + "/");
                }
            }
        }
    }

Answer 2

我通过以下方式相处得更好。重要提示：您需要将正确的初始值作为基础传递，该值是树中的第一个目录（不包括fs根）：

    private void addFileToTarGz(TarArchiveOutputStream tOut, String path, String base) throws IOException {
        File f = new File(path);
        String entryName = base + File.separatorChar + f.getName();
        TarArchiveEntry tarEntry = new TarArchiveEntry(f, entryName);
        tOut.putArchiveEntry(tarEntry);
        if (f.isFile()) {
            IOUtils.copy(new FileInputStream(f), tOut);
            tOut.closeArchiveEntry();
        } else {
            tOut.closeArchiveEntry();
            File[] children = f.listFiles();
            if (children != null) {
                for (File child : children) {
                    addFileToTarGz(tOut, child.getAbsolutePath(), entryName);
                }
            }
        }
    }