Question

我们的要求是从FTP服务器下载文件，我们一个接一个地按顺序使用下载文件，这需要花费大量时间。

顺序代码：

for(String mediaValue: generatedMediaTypes) {
    // Logic here is getting the user selected files from Ui and keep it in string array str
    try {
        ddownloadMultipleNavDbs(str[i]),uniqueID);
        //now we download all the files here with downloadfile logic with help of unique id we are a folder by that name and keep all this files in that folder
    } catch (Exception ex) {
        logger.error(ex.getMessage());
    }
}

现在将所有文件下载到uniqueID文件夹后，我会压缩并通过downloadZip(request,uniqueID)发送给客户：

public void downloadZipFile (HttpServletResponse response, String suuid) throws IOException
{
    try
    {
        ZipOutputStream zipOutputStream = new ZipOutputStream(response.getOutputStream());

        response.setContentType("application/octet-stream");

        File loadableFolder = new File(uniqueID);

        String timeStamp = new java.sql.Timestamp(Calendar.getInstance().getTime().getTime()).toString().replaceAll(
                "-", "_").replaceAll(" ", "_").replaceAll(":", "_");

        response.setHeader(
                "Content-Disposition",
                "attachment; filename=" + "File" + timeStamp.substring(
                        0, timeStamp.indexOf(".")) + ".ZIP");

        File[] loadableMedias = //here we get the files from that uinqueID folder

        ZipUtil.addFilesToZipStream(Medias, Folder,
                zipOutputStream);

        zipOutputStream.close();

        response.flushBuffer();
         response.getOutputStream().flush();
         response.getOutputStream().close();
    }

它在上面的代码中运行得很好。当我使用executorservice并行下载文件时

executorService.submit(new myThread(str[i]),uniqueID);

我面临错误：

getOutputStream（）已经关闭

有人可以解释一下我为什么会遇到这个错误吗？

为什么我们会遇到此错误以及如何解决？

getOutputStream（）已被称为Spring MVC

0 个答案: