spingmvc 文件下载打包zip

先缓存到File对象数组，再保存传流：

public Object doFileDownload(String id_src, OutputStream outputStream) throws IOException {HDFSUtils hdfsUtils = new HDFSUtils();String[] id_src_array = id_src.split(",");if (id_src_array.length > 10) {JSONObject result = new JSONObject();result.put("result", "0");result.put("desc", "Download file overran by ten flles!");return result;} else if (id_src_array.length == 1) {String download_url = doQueryFilePath(id_src);String hdfsPath = root_dir + download_url;InputStream inputStream = hdfsUtils.downLoadFile(id_src, hdfsPath);byte[] b = new byte[4096];int length;while ((length = inputStream.read(b)) > 0) {outputStream.write(b, 0, length);}outputStream.close();inputStream.close();return null;} else {ZipOutputStream out = new ZipOutputStream(new FileOutputStream("report.zip"));File[] file = new File[id_src_array.length];byte[] buffer = new byte[4096];for (int i = 0; i < id_src_array.length; i++) {file[i] = new File(id_src_array[i]);}for (int i = 0; i < file.length; i++) {String download_url = doQueryFilePath(id_src_array[i]);String hdfsPath = root_dir + download_url;InputStream inputStream = hdfsUtils.downLoadFile(id_src, hdfsPath);out.putNextEntry(new ZipEntry(download_url.split("/")[download_url.split("/").length - 1]));int len;while ((len = inputStream.read(buffer)) > 0) {out.write(buffer, 0, len);}out.closeEntry();inputStream.close();}out.close();File file1 = new File("report.zip");InputStream inputStream = new FileInputStream(file1);byte[] b = new byte[1024];int length;while ((length = inputStream.read(b)) > 0) {outputStream.write(b, 0, length);}inputStream.close();return null;}}