• 原生ZipOutputStream
      1. public void zip(File fileToZip, String relativePath, ZipOutputStream zipOut) throws IOException {
      2.       if (fileToZip.isHidden()) {
      3.           return;
      4.       }
      5.       if (fileToZip.isDirectory()) {
      6.           if (relativePath.endsWith("/")) {
      7.               zipOut.putNextEntry(new ZipEntry(relativePath));
      8.               zipOut.closeEntry();
      9.           } else {
      10.               zipOut.putNextEntry(new ZipEntry(relativePath + "/"));
      11.               zipOut.closeEntry();
      12.           }
      13.           File[] children = fileToZip.listFiles();
      14.           if (children != null) {
      15.               for (File childFile : children) {
      16.                   zip(childFile, relativePath + "/" + childFile.getName(), zipOut);
      17.               }
      18.           }
      19.           return;
      20.       }
      21.       FileInputStream fis = new FileInputStream(fileToZip);
      22.       ZipEntry zipEntry = new ZipEntry(relativePath);
      23.       zipOut.putNextEntry(zipEntry);
      24.       byte[] bytes = new byte[1024];
      25.       int length;
      26.       while ((length = fis.read(bytes)) >= 0) {
      27.           zipOut.write(bytes, 0, length);
      28.       }
      29.       fis.close();
      30.   }
    • commons-compress
      1. <dependency>
      2. <groupId>org.apache.commons</groupId>
      3. <artifactId>commons-compress</artifactId>
      4. <version>1.20</version>
      5. </dependency>
    1.     private void zip(File source, File destination) throws IOException, ArchiveException {
    2.         OutputStream archiveStream = new FileOutputStream(destination);
    3.         ArchiveOutputStream archive = new ArchiveStreamFactory().createArchiveOutputStream(ArchiveStreamFactory.ZIP, archiveStream);
    5.         Collection<File> fileList = FileUtils.listFiles(source, null, true);
    7.         for (File file : fileList) {
    8.             String entryName = getEntryName(source, file);
    9.             ZipArchiveEntry entry = new ZipArchiveEntry(entryName);
    10.             archive.putArchiveEntry(entry);
    12.             BufferedInputStream input = new BufferedInputStream(new FileInputStream(file));
    14.             IOUtils.copy(input, archive);
    15.             input.close();
    16.             archive.closeArchiveEntry();
    17.         }
    19.         archive.finish();
    20.         archiveStream.close();
    21.     }
    23.     private String getEntryName(File source, File file) throws IOException {
    24.         int index = source.getAbsolutePath().length() + 1;
    25.         String path = file.getCanonicalPath();
    27.         return path.substring(index);
    28.     }
    • zip4j
      使用maven：
      1. <!-- https://mvnrepository.com/artifact/net.lingala.zip4j/zip4j -->
      2.   <dependency>
      3.     <groupId>net.lingala.zip4j</groupId>
      4.     <artifactId>zip4j</artifactId>
      5.     <version>2.6.1</version>
      6.   </dependency>


    代码：

    1. <!-- 压缩文件，并下载 -->
    2. public void zip(File fileToZip, File zip, HttpServletResponse response) throws ZipException {
    3.     ZipFile zipFile = new ZipFile(zip);
    4.     ZipParameters parameters = new ZipParameters();
    5.     // 压缩方式
    6.     parameters.setCompressionMethod(CompressionMethod.DEFLATE);
    7.     // 压缩级别
    8.     parameters.setCompressionLevel(CompressionLevel.FAST);
    9.     // 要打包的文件夹
    10.     File[] fs = fileToZip.listFiles();
    11.     // 遍历test文件夹下所有的文件、文件夹
    12.     for (File f : fs) {
    13.         if (f.isDirectory()) {
    14.             zipFile.addFolder(f, parameters);
    15.         } else {
    16.             zipFile.addFile(f, parameters);
    17.         }
    18.     }
    20.     OutputStream outputStream = response.getOutputStream();
    21.     InputStream fis = new FileInputStream(zipFile.getFile());
    22.     // 将压缩文件写入到输出流
    23.     IOUtils.copy(fis, outputStream);
    24. }