java以zip压缩包的形式批量下载网络文件

@GetMapping("/downLoadFile")
public void downLoadFile(String urls,HttpServletResponse response)
        throws Exception{
    if(StringUtils.isNotBlank(urls)){
        String savePath = rootUrl+"/"+"网络文件";
        File directory = new File(savePath);
        if (!directory.exists()) {
            directory.mkdir();
        }
        String[] fileArr = urls.split(",");
        URL url = null;
        HttpURLConnection conn = null;
        InputStream is = null;
        File file = null;
        FileOutputStream fileOutputStream = null;
        byte[] data = null;
        String fileName = "";
        String[] fileNameArr = null;
        for(int i = 0;i < fileArr.length;i++){
            url = new URL(fileArr[i]);
            conn = (HttpURLConnection)url.openConnection();
            conn.setConnectTimeout(10 * 1000);// 连接超时时间为10秒
            is = conn.getInputStream();// 通过输入流获取图片数据
            fileNameArr = fileArr[i].split("\\/");
            fileName = fileNameArr[fileNameArr.length-1];
            file = new File(savePath+"/"+fileName);
            fileOutputStream = new FileOutputStream(file);
            data = readInputStream(is);
            fileOutputStream.write(data);
            fileOutputStream.close();
        }
        ZipUtil.zip(savePath);// 压缩生成的word文档
        String zipFileName = savePath+".zip";
        File zipFile = new File(zipFileName);
        BufferedInputStream bins = 
        new BufferedInputStream(new FileInputStream(zipFile));
        response.setCharacterEncoding("UTF-8");
        response.setHeader("content-Type", "application/x-download");
        response.setHeader("Content-Disposition", "attachment;filename=" 
        + URLEncoder.encode(zipFile.getName(), "UTF-8"));
        ServletOutputStream out = null;
        try {
            // 这边直接压缩并且在浏览器下载
            out = response.getOutputStream();
            int bytesRead = 0;
            byte[] buffer = new byte[8192];
            while ((bytesRead = bins.read(buffer, 0, 8192)) != -1) {
                out.write(buffer, 0, bytesRead);
            }
            out.flush();
            bins.close();
            out.close();
            File delZipFile = new File(zipFileName);
            if (delZipFile != null && delZipFile.isFile() && delZipFile.exists()) {
                delZipFile.delete();// 删除压缩文件
            }
            File delFiles = new File(savePath);
            FileUtil.deleteFiles(delFiles);// 删除发票文件
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
private static byte[] readInputStream(InputStream inStream) throws Exception {
    ByteArrayOutputStream outStream = new ByteArrayOutputStream();
    //创建一个Buffer字符串
    byte[] buffer = new byte[6024];
    //每次读取的字符串长度，如果为-1，代表全部读取完毕
    int len;
    //使用一个输入流从buffer里把数据读取出来
    while ((len = inStream.read(buffer)) != -1) {
        //用输出流往buffer里写入数据，中间参数代表从哪个位置开始读，len代表读取的长度
        outStream.write(buffer, 0, len);
    }
    //关闭输入流
    inStream.close();
    //把outStream里的数据写入内存
    return outStream.toByteArray();
}