java - how to zip a folder itself using java

Question

Suppose I have the following directory structure.

D:\reports\january\

Inside january there are suppose two excel files say A.xls and B.xls. There are many places where it has been written about how to zip files using java.util.zip. But I want to zip the january folder itself inside reports folder so that both january and january.zip will be present inside reports. (That means when I unzip the january.zip file I should get the january folder).

Can anyone please provide me the code to do this using java.util.zip. Please let me know whether this can be more easily done by using other libraries.

Thanks a lot...

score 103 · Accepted Answer

您是否尝试过Zeroturnaround Zip库？真的很整洁！压缩文件夹只是一个衬里：

ZipUtil.pack(new File("D:\\reports\\january\\"), new File("D:\\reports\\january.zip"));

（感谢Oleg Šelajev的例子）

score 93 · Accepted Answer

这是 Java 8+ 示例：

public static void pack(String sourceDirPath, String zipFilePath) throws IOException {
    Path p = Files.createFile(Paths.get(zipFilePath));
    try (ZipOutputStream zs = new ZipOutputStream(Files.newOutputStream(p))) {
        Path pp = Paths.get(sourceDirPath);
        Files.walk(pp)
          .filter(path -> !Files.isDirectory(path))
          .forEach(path -> {
              ZipEntry zipEntry = new ZipEntry(pp.relativize(path).toString());
              try {
                  zs.putNextEntry(zipEntry);
                  Files.copy(path, zs);
                  zs.closeEntry();
            } catch (IOException e) {
                System.err.println(e);
            }
          });
    }
}

score 69 · Accepted Answer

打包即可轻松解决，java.util.Zip无需任何额外Jar文件

只需复制以下代码并run it使用您的IDE

//Import all needed packages
package general;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipUtils {

    private List <String> fileList;
    private static final String OUTPUT_ZIP_FILE = "Folder.zip";
    private static final String SOURCE_FOLDER = "D:\\Reports"; // SourceFolder path

    public ZipUtils() {
        fileList = new ArrayList < String > ();
    }

    public static void main(String[] args) {
        ZipUtils appZip = new ZipUtils();
        appZip.generateFileList(new File(SOURCE_FOLDER));
        appZip.zipIt(OUTPUT_ZIP_FILE);
    }

    public void zipIt(String zipFile) {
        byte[] buffer = new byte[1024];
        String source = new File(SOURCE_FOLDER).getName();
        FileOutputStream fos = null;
        ZipOutputStream zos = null;
        try {
            fos = new FileOutputStream(zipFile);
            zos = new ZipOutputStream(fos);

            System.out.println("Output to Zip : " + zipFile);
            FileInputStream in = null;

            for (String file: this.fileList) {
                System.out.println("File Added : " + file);
                ZipEntry ze = new ZipEntry(source + File.separator + file);
                zos.putNextEntry(ze);
                try {
                    in = new FileInputStream(SOURCE_FOLDER + File.separator + file);
                    int len;
                    while ((len = in .read(buffer)) > 0) {
                        zos.write(buffer, 0, len);
                    }
                } finally {
                    in.close();
                }
            }

            zos.closeEntry();
            System.out.println("Folder successfully compressed");

        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            try {
                zos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public void generateFileList(File node) {
        // add file only
        if (node.isFile()) {
            fileList.add(generateZipEntry(node.toString()));
        }

        if (node.isDirectory()) {
            String[] subNote = node.list();
            for (String filename: subNote) {
                generateFileList(new File(node, filename));
            }
        }
    }

    private String generateZipEntry(String file) {
        return file.substring(SOURCE_FOLDER.length() + 1, file.length());
    }
}

参考mkyong ..我更改了当前问题要求的代码

score 34 · Accepted Answer

这是一个非常简洁的 Java 7+ 解决方案，它完全依赖于普通的 JDK 类，不需要第三方库：

public static void pack(final Path folder, final Path zipFilePath) throws IOException {
    try (
            FileOutputStream fos = new FileOutputStream(zipFilePath.toFile());
            ZipOutputStream zos = new ZipOutputStream(fos)
    ) {
        Files.walkFileTree(folder, new SimpleFileVisitor<Path>() {
            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                zos.putNextEntry(new ZipEntry(folder.relativize(file).toString()));
                Files.copy(file, zos);
                zos.closeEntry();
                return FileVisitResult.CONTINUE;
            }

            public FileVisitResult preVisitDirectory(Path dir, BasicFileAttributes attrs) throws IOException {
                zos.putNextEntry(new ZipEntry(folder.relativize(dir).toString() + "/"));
                zos.closeEntry();
                return FileVisitResult.CONTINUE;
            }
        });
    }
}

它复制中的所有文件folder，包括空目录，并在中创建一个 zip 存档zipFilePath。

score 13 · Accepted Answer

Java 7+，commons.io

public final class ZipUtils {

    public static void zipFolder(final File folder, final File zipFile) throws IOException {
        zipFolder(folder, new FileOutputStream(zipFile));
    }

    public static void zipFolder(final File folder, final OutputStream outputStream) throws IOException {
        try (ZipOutputStream zipOutputStream = new ZipOutputStream(outputStream)) {
            processFolder(folder, zipOutputStream, folder.getPath().length() + 1);
        }
    }

    private static void processFolder(final File folder, final ZipOutputStream zipOutputStream, final int prefixLength)
            throws IOException {
        for (final File file : folder.listFiles()) {
            if (file.isFile()) {
                final ZipEntry zipEntry = new ZipEntry(file.getPath().substring(prefixLength));
                zipOutputStream.putNextEntry(zipEntry);
                try (FileInputStream inputStream = new FileInputStream(file)) {
                    IOUtils.copy(inputStream, zipOutputStream);
                }
                zipOutputStream.closeEntry();
            } else if (file.isDirectory()) {
                processFolder(file, zipOutputStream, prefixLength);
            }
        }
    }
}

score 10 · Accepted Answer

我通常使用我曾经为此任务编写的辅助类：

import java.util.zip.*;
import java.io.*;

public class ZipExample {
    public static void main(String[] args){
        ZipHelper zippy = new ZipHelper();
        try {
            zippy.zipDir("folderName","test.zip");
        } catch(IOException e2) {
            System.err.println(e2);
        }
    }
}

class ZipHelper  
{
    public void zipDir(String dirName, String nameZipFile) throws IOException {
        ZipOutputStream zip = null;
        FileOutputStream fW = null;
        fW = new FileOutputStream(nameZipFile);
        zip = new ZipOutputStream(fW);
        addFolderToZip("", dirName, zip);
        zip.close();
        fW.close();
    }

    private void addFolderToZip(String path, String srcFolder, ZipOutputStream zip) throws IOException {
        File folder = new File(srcFolder);
        if (folder.list().length == 0) {
            addFileToZip(path , srcFolder, zip, true);
        }
        else {
            for (String fileName : folder.list()) {
                if (path.equals("")) {
                    addFileToZip(folder.getName(), srcFolder + "/" + fileName, zip, false);
                } 
                else {
                     addFileToZip(path + "/" + folder.getName(), srcFolder + "/" + fileName, zip, false);
                }
            }
        }
    }

    private void addFileToZip(String path, String srcFile, ZipOutputStream zip, boolean flag) throws IOException {
        File folder = new File(srcFile);
        if (flag) {
            zip.putNextEntry(new ZipEntry(path + "/" +folder.getName() + "/"));
        }
        else {
            if (folder.isDirectory()) {
                addFolderToZip(path, srcFile, zip);
            }
            else {
                byte[] buf = new byte[1024];
                int len;
                FileInputStream in = new FileInputStream(srcFile);
                zip.putNextEntry(new ZipEntry(path + "/" + folder.getName()));
                while ((len = in.read(buf)) > 0) {
                    zip.write(buf, 0, len);
                }
            }
        }
    }
}

score 9 · Accepted Answer

增强的 Java 8+ 示例（来自Nikita Koksharov 的回答）

public static void pack(String sourceDirPath, String zipFilePath) throws IOException {
    Path p = Files.createFile(Paths.get(zipFilePath));
    Path pp = Paths.get(sourceDirPath);
    try (ZipOutputStream zs = new ZipOutputStream(Files.newOutputStream(p));
        Stream<Path> paths = Files.walk(pp)) {
        paths
          .filter(path -> !Files.isDirectory(path))
          .forEach(path -> {
              ZipEntry zipEntry = new ZipEntry(pp.relativize(path).toString());
              try {
                  zs.putNextEntry(zipEntry);
                  Files.copy(path, zs);
                  zs.closeEntry();
            } catch (IOException e) {
                System.err.println(e);
            }
          });
    }
}

Files.walk已被包裹在try with resources块中，以便可以关闭流。这解决了由标识的阻止程序问题SonarQube。感谢@Matt Harrison 指出这一点。

score 4 · Accepted Answer

我会使用Apache Ant，它有一个 API 可以从 Java 代码而不是 XML 构建文件调用任务。

Project p = new Project();
p.init();
Zip zip = new Zip();
zip.setProject(p);
zip.setDestFile(zipFile); // a java.io.File for the zip you want to create
zip.setBasedir(new File("D:\\reports"));
zip.setIncludes("january/**");
zip.perform();

在这里，我告诉它从基本目录开始D:\reports并压缩january文件夹和其中的所有内容。生成的 zip 文件中的路径将与相对于的原始路径相同D:\reports，因此它们将包含january前缀。

score 2 · Accepted Answer

使用zip4j你可以简单地做到这一点

ZipFile zipfile = new ZipFile(new File("D:\\reports\\january\\filename.zip"));
zipfile.addFolder(new File("D:\\reports\\january\\"));

它将存档您的文件夹及其中的所有内容。

使用.extractAll方法将其全部取出：

zipfile.extractAll("D:\\destination_directory");

score 2 · Accepted Answer

尝试这个：

 import java.io.File;

 import java.io.FileInputStream;

 import java.io.FileOutputStream;

 import java.util.zip.ZipEntry;

 import java.util.zip.ZipOutputStream;


  public class Zip {

public static void main(String[] a) throws Exception {

    zipFolder("D:\\reports\\january", "D:\\reports\\january.zip");

  }

  static public void zipFolder(String srcFolder, String destZipFile) throws Exception {
    ZipOutputStream zip = null;
    FileOutputStream fileWriter = null;
    fileWriter = new FileOutputStream(destZipFile);
    zip = new ZipOutputStream(fileWriter);
    addFolderToZip("", srcFolder, zip);
    zip.flush();
    zip.close();
  }
  static private void addFileToZip(String path, String srcFile, ZipOutputStream zip)
      throws Exception {
    File folder = new File(srcFile);
    if (folder.isDirectory()) {
      addFolderToZip(path, srcFile, zip);
    } else {
      byte[] buf = new byte[1024];
      int len;
      FileInputStream in = new FileInputStream(srcFile);
      zip.putNextEntry(new ZipEntry(path + "/" + folder.getName()));
      while ((len = in.read(buf)) > 0) {
        zip.write(buf, 0, len);
      }
    }
  }

  static private void addFolderToZip(String path, String srcFolder, ZipOutputStream zip)
      throws Exception {
    File folder = new File(srcFolder);

    for (String fileName : folder.list()) {
      if (path.equals("")) {
        addFileToZip(folder.getName(), srcFolder + "/" + fileName, zip);
      } else {
        addFileToZip(path + "/" + folder.getName(), srcFolder + "/" +   fileName, zip);
      }
    }
  }



   }

score 1 · Accepted Answer

我发现这个解决方案对我来说非常好。不需要任何第三方 api

'test' 实际上是一个文件夹，里面有很多文件。

String folderPath= "C:\Users\Desktop\test";
String zipPath = "C:\Users\Desktop\test1.zip";

private boolean zipDirectory(String folderPath, String zipPath) throws IOException{

        byte[] buffer = new byte[1024];
        FileInputStream fis = null;
        ZipOutputStream zos = null;

        try{
            zos = new ZipOutputStream(new FileOutputStream(zipPath));
            updateSourceFolder(new File(folderPath));

            if (sourceFolder == null) {
                zos.close();
                return false;
            }
            generateFileAndFolderList(new File(folderPath));

            for (String unzippedFile: fileList) {
                System.out.println(sourceFolder + unzippedFile);

                ZipEntry entry = new ZipEntry(unzippedFile);
                zos.putNextEntry(entry);

                if ((unzippedFile.substring(unzippedFile.length()-1)).equals(File.separator))
                    continue;
                try{
                    fis = new FileInputStream(sourceFolder + unzippedFile);
                    int len=0;
                    while ((len = fis.read(buffer))>0) {
                        zos.write(buffer,0,len);
                    }
                } catch(IOException e) {
                    return false;
                } finally {
                    if (fis != null)
                        fis.close();
                }
            }
            zos.closeEntry();
        } catch(IOException e) {
            return false;
        } finally {
            zos.close();
            fileList = null;
            sourceFolder = null;
        }
        return true;
    }

    private void generateFileAndFolderList(File node) {
        if (node.isFile()) {
            fileList.add(generateZipEntry(node.getAbsoluteFile().toString()));
        }
        if (node.isDirectory()) {
            String dir = node.getAbsoluteFile().toString();
            fileList.add(dir.substring(sourceFolder.length(), dir.length()) + File.separator);

            String[] subNode = node.list();
            for (String fileOrFolderName : subNode) {
                generateFileAndFolderList(new File(node, fileOrFolderName));
            }
        }
    }

    private void updateSourceFolder(File node) {
        if (node.isFile() || node.isDirectory()) {
            String sf = node.getAbsoluteFile().toString();
            sourceFolder = sf.substring(0, (sf.lastIndexOf("/") > 0 ? sf.lastIndexOf("/") : sf.lastIndexOf("\\")));
            sourceFolder += File.separator;
        } else
            sourceFolder = null;
    }

    private String generateZipEntry(String file) {
        return file.substring(sourceFolder.length(), file.length());
    }

score 1 · Accepted Answer

Java 6 +

import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class Zip {

    private static final FileFilter FOLDER_FILTER = new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            return pathname.isDirectory();
        }
    };

    private static final FileFilter FILE_FILTER = new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            return pathname.isFile();
        }
    };


    private static void compress(File file, ZipOutputStream outputStream, String path) throws IOException {

        if (file.isDirectory()) {
            File[] subFiles = file.listFiles(FILE_FILTER);
            if (subFiles != null) {
                for (File subFile : subFiles) {
                    compress(subFile, outputStream, new File(path, subFile.getName()).getAbsolutePath());
                }
            }
            File[] subDirs = file.listFiles(FOLDER_FILTER);
            if (subDirs != null) {
                for (File subDir : subDirs) {
                    compress(subDir, outputStream, new File(path, subDir.getName()).getAbsolutePath());
                }
            }
        } else if (file.exists()) {
            outputStream.putNextEntry(new ZipEntry(path));
            FileInputStream inputStream = new FileInputStream(file);
            byte[] buffer = new byte[1024];
            int len;
            while ((len = inputStream.read(buffer)) >= 0) {
                outputStream.write(buffer, 0, len);
            }
            outputStream.closeEntry();
        }
    }

    public static void compress(String dirPath, String zipFilePath) throws IOException {
        File file = new File(dirPath);
        final ZipOutputStream outputStream = new ZipOutputStream(new FileOutputStream(zipFilePath));
        compress(file, outputStream, "/");
        outputStream.close();
    }

}

score 1 · Accepted Answer

此方法压缩文件夹并将所有子文件和文件夹（包括空文件夹）添加到 zip 文件中。

void zipFolder(Path sourceDir, Path targetFile) throws IOException {
    ZipDirectoryVisitor zipVisitor = new ZipDirectoryVisitor(sourceDir);
    Files.walkFileTree(sourceDir, zipVisitor);
    FileOutputStream fos = new FileOutputStream(targetFile.toString());
    ZipOutputStream zos = new ZipOutputStream(fos);
    byte[] buffer = new byte[1024];
    for (ZipEntry entry : zipVisitor.getZipEntries()) {
        zos.putNextEntry(entry);
        Path curFile = Paths.get(sourceDir.getParent().toString(), entry.toString());
        if (!curFile.toFile().isDirectory()) {
            FileInputStream in = new FileInputStream(Paths.get(sourceDir.getParent().toString(), entry.toString()).toString());
            int len;
            while ((len = in.read(buffer)) > 0) {
                zos.write(buffer, 0, len);
            }
            in.close();
        }
        zos.closeEntry();
    }
    zos.close();

}

这是 ZipDirectoryVisitor 的实现：

class ZipDirectoryVisitor extends SimpleFileVisitor<Path> {
    private Path dirToZip;
    private List<ZipEntry> zipEntries; // files and folders inside source folder as zip entries
    public ZipDirectoryVisitor(Path dirToZip) throws IOException {
        this.dirToZip = dirToZip;
        zipEntries = new ArrayList<>();
    }

    @Override
    public FileVisitResult visitFile(Path path, BasicFileAttributes basicFileAttributes) throws IOException {
        // According to zip standard backslashes
        // should not be used in zip entries
        String zipFile = dirToZip.getParent().relativize(path).toString().replace("\\", "/");
        ZipEntry entry = new ZipEntry(zipFile);
        zipEntries.add(entry);
        return FileVisitResult.CONTINUE;
    }


    @Override
    public FileVisitResult preVisitDirectory(Path path, BasicFileAttributes basicFileAttributes) throws IOException {
        String zipDir = dirToZip.getParent().relativize(path).toString().replace("\\", "/");
        // Zip directory entries should end with a forward slash
        ZipEntry entry = new ZipEntry(zipDir + "/");
        zipEntries.add(entry);
        return FileVisitResult.CONTINUE;
    }


    @Override
    public FileVisitResult visitFileFailed(Path path, IOException e) throws IOException {
        System.err.format("Could not visit file %s while creating a file list from file tree", path);
        return FileVisitResult.TERMINATE;
    }

    public List<ZipEntry> getZipEntries() {
        return zipEntries;
    }
}

score 0 · Accepted Answer

试试这个 zip("C:\testFolder", "D:\testZip.zip")

public void zip( String sourcDirPath,  String zipPath) throws IOException {
  Path zipFile = Files.createFile(Paths.get(zipPath));

  Path sourceDirPath = Paths.get(sourcDirPath);
  try (ZipOutputStream zipOutputStream = new ZipOutputStream(Files.newOutputStream(zipFile));
       Stream<Path> paths = Files.walk(sourceDirPath)) {
      paths
              .filter(path -> !Files.isDirectory(path))
              .forEach(path -> {
                  ZipEntry zipEntry = new ZipEntry(sourceDirPath.relativize(path).toString());
                  try {
                      zipOutputStream.putNextEntry(zipEntry);
                      Files.copy(path, zipOutputStream);
                      zipOutputStream.closeEntry();
                  } catch (IOException e) {
                      System.err.println(e);
                  }
              });
  }

  System.out.println("Zip is created at : "+zipFile);
}

score 0 · Accepted Answer

改进@Nikita Koksharov 的代码在打包空目录时遇到问题。

private void zipDirectory(OutputStream outputStream, Path directoryPath) throws IOException {
    try (ZipOutputStream zs = new ZipOutputStream(outputStream)) {
        Path pp = directoryPath;
        Files.walk(pp)
                .forEach(path -> {
                    try {
                        if (Files.isDirectory(path)) {
                            zs.putNextEntry(new ZipEntry(pp.relativize(path).toString() + "/"));
                        } else {
                            ZipEntry zipEntry = new ZipEntry(pp.relativize(path).toString());
                            zs.putNextEntry(zipEntry);
                            Files.copy(path, zs);
                            zs.closeEntry();
                        }
                    } catch (IOException e) {
                        System.err.println(e);
                    }
                });
    }
}

测试使用

    FileOutputStream zipOutput = new FileOutputStream("path_to_file.zip");
    Path pathOutput = Path.of("path_directory_fid");
    zipDirectory(outputStream, pathOutput);

score 0 · Accepted Answer

我已经修改了上述解决方案并替换Files.walk为Files.list. 这也假设您要压缩的目录仅包含文件而不包含任何子目录。

private void zipDirectory(Path dirPath) throws IOException {
        String zipFilePathStr = dirPath.toString() + ".zip";
        Path zipFilePath = Files.createFile(Paths.get(zipFilePathStr));

        try (ZipOutputStream zs = new ZipOutputStream(Files.newOutputStream(zipFilePath))) {
            Files.list(dirPath)
                .filter(filePath-> !Files.isDirectory(filePath))
                .forEach(filePath-> {
                    ZipEntry zipEntry = new ZipEntry(dirPath.relativize(filePath).toString());
                    try {
                        zs.putNextEntry(zipEntry);
                        Files.copy(filePath, zs);
                        zs.closeEntry();
                    }
                    catch (IOException e) {
                        System.err.println(e);
                    }
                });
        }
    }

java - how to zip a folder itself using java

16 回答 16

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