springboot下载文件时遇到io异常和response响应已开始异常,求解决，如何解决？(语言-java)

Question

下面是DownFileUtils类中的代码，找了好久都找不出问题。我明明没有在前面的代码中关闭流。为什么会报io流已关闭异常呢？请各位帮忙！！
（有时候报io异常有时候报response异常）

    private static byte[] createZip(String sourceFilePath) throws Exception {
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ZipOutputStream zip = new ZipOutputStream(outputStream);
        // 将目标文件打包成zip导出
        File file = new File(sourceFilePath);
        handlerFile(zip, file, "附件");
        // 无异常关闭流，它将无条件的关闭一个可被关闭的对象而不抛出任何异常。
        IOUtils.closeQuietly(zip);
        return outputStream.toByteArray();
    }


  @SneakyThrows
    public static void exportZip(HttpServletResponse response, String sourceFilePath, String fileName, boolean isBatch, Predicate<MultipartFile> predicate) {
        // 默认文件名以时间戳作为前缀
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        String downloadName = fileName + "-" + sdf.format(new Date()) + ".zip";
        // 将文件进行打包下载
        boolean b = false;
        OutputStream os = null;
        File zip = null;
        try {
            os = response.getOutputStream();
            // 接收压缩包字节
            byte[] data = createZip(sourceFilePath);
            //上传文件到文件服务器
            if (isBatch) {
                zip = ZipUtil.zip(sourceFilePath, Charset.forName("UTF-8"));
                FileInputStream fis = new FileInputStream(zip);
                MultipartFile file = new MockMultipartFile("file", downloadName, "text/plain", fis);
                b = predicate.test(file);
            } else {
                response.reset();
                response.setCharacterEncoding("UTF-8");
                response.addHeader("Access-Control-Allow-Origin", "*");
                response.setHeader("Access-Control-Expose-Headers", "*");
                // 下载文件名乱码问题
                response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(downloadName, "UTF-8"));
                //response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + downloadName);
                response.addHeader("Content-Length", "" + data.length);
                response.setContentType("application/octet-stream;charset=UTF-8");
               //org.apache.commons.io下的类
                IOUtils.write(data, os);
            }

        } catch (Exception e) {
            log.info("下载异常");
            e.printStackTrace();
        } finally {
            os.flush();
            os.close();
            if (isBatch) {
                // 删除临时文件
                zip.delete();
            }
            deleteDir(new File(sourceFilePath));
        }
    }

下面是异常日志：

Answer 1

如果在执行createZip方法时抛出了异常，那么IOUtils.closeQuietly(zip)方法将不会执行，可能导致输出流未被关闭，从而造成内存泄漏。