通过zip字节流解压转化成zip文件输出

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.io.IoUtil;
import cn.hutool.core.util.ObjectUtil;
import cn.hutool.core.util.StrUtil;

@Override
public void batchDownloadByFileIds(List<String> fileIds, HttpServletResponse response) {
    response.setContentType("application/octet-stream; charset=UTF-8");
    Map<String, InputStream> fileEntries = new HashMap<String, InputStream>();
    Map<String, FileInfo> fileMap = new HashMap<String, FileInfo>();
    try (
            InputStream inputStream = filesSDKClient.downloadMulti(fileIds);
            ServletOutputStream outputStream = response.getOutputStream();
            ZipInputStream zis = new ZipInputStream(inputStream);


    ) {
        File zipFile = File.createTempFile("package", ".zip");
        for (String fileId : fileIds) {
            FileInfo fileInfo = filesSDKClient.getFileInfo(fileId);
            if (ObjectUtil.isNotEmpty(fileInfo)) {
                fileMap.put(fileInfo.getId(), fileInfo);
            }
        }
        ZipEntry zipEntry = null;
        while ((zipEntry = zis.getNextEntry()) != null) {
            fileEntries.put(zipEntry.getName(), convertZipInputStreamToInputStream(zis));
        }
        zipFiles(fileEntries, fileMap, zipFile);
        FileInputStream fis = new FileInputStream(zipFile);
        response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + "package.zip");
        IoUtil.copy(fis, outputStream);
    } catch (IOException e) {
        e.printStackTrace();
    } catch (FilesSDKException e) {
        e.printStackTrace();
    }
}


private InputStream convertZipInputStreamToInputStream(
        final ZipInputStream in) throws IOException {
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    IoUtil.copy(in, out);
    InputStream is = new ByteArrayInputStream(out.toByteArray());
    return is;
}

private void zipFiles(Map<String, InputStream> fileEntries, Map<String, FileInfo> fileMap, File zipFile) {
    try (ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(zipFile));) {
        for (Map.Entry<String, InputStream> fileEntry : fileEntries.entrySet()) {
            String fileKey = fileEntry.getKey();
            FileInfo fileInfo = fileMap.get(fileKey);
            if (ObjectUtil.isNotEmpty(fileInfo)) {
                zos.putNextEntry(new ZipEntry(fileInfo.getFileName()));
                IoUtil.copy(fileEntry.getValue(), zos);
                zos.closeEntry();
            }
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException ioException) {
        ioException.printStackTrace();
    }
}