SpringBoot 多文件打包下载

第一种

    @RestController
    @RequestMapping("/download")
    public class DownloadController {

        @GetMapping("/files")
        public ResponseEntity<InputStreamResource> downloadFiles() throws IOException {
            // 创建临时ZIP文件
            Path zipFilePath = Files.createTempFile("files", ".zip");
            // 需要打包的文件路径
            String[] filePaths = {
                    "D:/sample.xls",
                    "D:/qrcode1.png"
            };
            // 打包文件
            try (ZipOutputStream zos = new ZipOutputStream(Files.newOutputStream(zipFilePath))) {
                for (String filePath : filePaths) {
                    File file = new File(filePath);
                    try (FileInputStream fis = new FileInputStream(file)) {
                        ZipEntry zipEntry = new ZipEntry(file.getName());
                        zos.putNextEntry(zipEntry);

                        byte[] buffer = new byte[1024];
                        int len;
                        while ((len = fis.read(buffer)) > 0) {
                            zos.write(buffer, 0, len);
                        }
                        zos.closeEntry();
                    }
                }
            }
            // 返回ZIP文件
            InputStreamResource resource = new InputStreamResource(Files.newInputStream(zipFilePath));
            HttpHeaders headers = new HttpHeaders();
            headers.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename="+URLEncoder.encode("files.zip","UTF-8"));
            return ResponseEntity
                    .ok()
                    .headers(headers)
                    .contentType(MediaType.APPLICATION_OCTET_STREAM)
                    .body(resource);
        }
        
    }

第二种与MINIO文件服务器集成，inputStream这里需要改成自己的Api

    @GetMapping("/download/files")
    public ResponseEntity<InputStreamResource> downloadFiles(@RequestParam List<String> fileTokens) throws IOException {
        // 获取文件信息列表
//        List<FileEntity> fileEntities = fileRepository.findByFileTokenIn(fileTokens);
//        LambdaQueryWrapper<SysOss> sysOssLambdaQueryWrapper = Wrappers.lambdaQuery(SysOss.class).in(SysOss::getFileToken, fileTokens);

        GetFileInfoParam getFileInfoParam = new GetFileInfoParam();
        getFileInfoParam.setF8s(fileTokens);
        List<SysOssVO> ossVOList =
                iFileDownloadClient.getFileByToken(getFileInfoParam).getData();
        if (ossVOList.isEmpty()) {
            return null;
        }
        // 创建字节数组输出流用于打包ZIP文件
        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
        try (ZipOutputStream zos = new ZipOutputStream(byteArrayOutputStream)) {
            for (SysOssVO ossVO : ossVOList) {
//                String bucketName = fileEntity.getBucketName();
//                String objectName = fileEntity.getObjectName();
//                String fileName = fileEntity.getFileName();

                // 从MinIO获取文件输入流
                /*try (var inputStream = minioClient.getObject(
                        GetObjectArgs.builder()
                                .bucket(bucketName)
                                .object(objectName)
                                .build())) {*/


                    try (var inputStream = iFileDownloadClient.getAttachmentStream(ossVO.getFileToken())) {


                    // 将文件写入ZIP文件
                    ZipEntry zipEntry = new ZipEntry(ossVO.getFileName());
                    zos.putNextEntry(zipEntry);

                    byte[] buffer = new byte[1024];
                    int len;
                    while ((len = inputStream.read(buffer)) > 0) {
                        zos.write(buffer, 0, len);
                    }
                    zos.closeEntry();
                }
            }
        }

        // 返回ZIP文件
        InputStreamResource resource = new InputStreamResource(new ByteArrayInputStream(byteArrayOutputStream.toByteArray()));

        HttpHeaders headers = new HttpHeaders();
        headers.add(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename="+URLEncoder.encode("files.zip","UTF-8"));

        return ResponseEntity
                .ok()
                .headers(headers)
                .contentType(MediaType.APPLICATION_OCTET_STREAM)
                .body(resource);
    }