我正在用DiskFileItemFactory.But上传文件，文件不是用Java上传的

Question

我正在尝试使用DiskFileItemFactory.But的java web应用程序上传文件，问题是它在迭代中没有得到任何file.It显示空数组。

iter.size()为0。请看下面我的代码。

public ModelAndView upload( ModelMap model, HttpSession session, HttpServletRequest request, HttpServletResponse resp) throws IOException, ServletException, FileUploadException {
if (ServletFileUpload.isMultipartContent(request)) {

    System.out.println("file available");
}

boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if (isMultipart) {
    //  ResourceImpl resource = new ResourceImpl();
    try {
        //Create a factory for disk-based file items
        FileItemFactory factory = new DiskFileItemFactory();
        ServletFileUpload upload = new ServletFileUpload(factory);
        List items = upload.parseRequest(request);
        System.out.println(items.size());
        Iterator iter = items.iterator();
        while (iter.hasNext()) {

            FileItem item = (FileItem) iter.next();
        }

    } catch (Exception e) {

    }
}

我的形式是；

 <form method="post" action="/DropBox/upload.html" enctype="multipart/form-data">
     Select file to upload: <input type="file" name="uploadFile" />
     <br/><br/>
     <input type="submit" value="Upload" />
 </form>

我做错了什么。请帮帮我。谢谢。

Answer 1

你应该尝试每一个。它做得很好。

if (ServletFileUpload.isMultipartContent(request)) {

    try {
        List<FileItem> multipart = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);

        for (FileItem item : multipart) {

            if (!item.isFormField()) {

                filename = new File(item.getName()).getName();
                folder = "path";
                File file = new File(folder);

                if (!file.exists()) {
                    file.mkdir();

                }
            }

            item.write(new File(folder + "/" + filename));
        }
    }
}