SpringBoot中实现多文件打包下载的两种方案

@GetMapping("/download-multiple")
public ResponseEntity<byte[]> downloadMultipleFiles(@RequestParam List<String> filenames) {
    try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
         ZipOutputStream zos = new ZipOutputStream(baos)) {
         
        for (String filename : filenames) {
            Path filePath = Paths.get("/path/to/files").resolve(filename).normalize();
            if (Files.exists(filePath)) {
                ZipEntry zipEntry = new ZipEntry(filename);
                zos.putNextEntry(zipEntry);
                Files.copy(filePath, zos);
                zos.closeEntry();
            }
        }
        zos.finish();

        HttpHeaders headers = new HttpHeaders();
        headers.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename="files.zip"");
        return ResponseEntity.ok().headers(headers).body(baos.toByteArray());
    } catch (IOException e) {
        return ResponseEntity.internalServerError().build();
    }
}

minio:
  url: http://localhost:9000
  accessKey: your-key
  secretKey: your-secret
  bucketName: your-bucket

@Autowired
private MinioClient minioClient;

@GetMapping("/download-zip")
public void downloadZip(@RequestParam List<String> fileNames, HttpServletResponse response) {
    response.setContentType("application/zip");
    response.setHeader("Content-Disposition", "attachment; filename=download.zip");
    
    try (ZipOutputStream zos = new ZipOutputStream(response.getOutputStream())) {
        for (String fileName : fileNames) {
            try (InputStream inputStream = minioClient.getObject(
                    GetObjectArgs.builder().bucket(bucketName).object(fileName).build())) {
                ZipEntry zipEntry = new ZipEntry(fileName);
                zos.putNextEntry(zipEntry);
                IOUtils.copy(inputStream, zos);
                zos.closeEntry();
            }
        }
    } catch (Exception e) {
        throw new RuntimeException("下载失败", e);
    }
}

// 使用Fetch API触发下载
fetch(`/download-multiple?filenames=file1.txt,file2.jpg`, {
    method: 'GET'
}).then(response => {
    const blob = new Blob([response.blob()]);
    const link = document.createElement('a');
    link.href = URL.createObjectURL(blob);
    link.download = 'files.zip';
    link.click();
});