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Java servlet将文件上载到";网页;文件夹_Java_Servlets_File Upload - Fatal编程技术网

Java servlet将文件上载到";网页;文件夹

Java servlet将文件上载到";网页;文件夹,java,servlets,file-upload,Java,Servlets,File Upload,我正在制作简单的上传servlet 我的代码是: private final int FILE_LENGHT = 150; private final String UPLOAD_DIRECTORY = "/img/"; . . . . . @Override public void uploadFile(HttpServletRequest request) { //process only if its multipart content

我正在制作简单的上传servlet

我的代码是:

    private final int FILE_LENGHT = 150;
    private final String UPLOAD_DIRECTORY = "/img/";
.
.
.
.
.

    @Override
    public void uploadFile(HttpServletRequest request) {
        //process only if its multipart content
        if (ServletFileUpload.isMultipartContent(request)) {
            try {
                List<FileItem> multiparts = new ServletFileUpload(
                        new DiskFileItemFactory()).parseRequest(request);
                for (FileItem item : multiparts) {
                    if (!item.isFormField()) {
                        File f = new File(item.getName());
                        String ex = suo.getFileExtension(f);
                        String name = suo.randomString(FILE_LENGHT) + "." + ex;
                        item.write(new File(UPLOAD_DIRECTORY + File.separator + name));
                    }
                }

                //File uploaded successfully
                request.setAttribute("message", "File Uploaded Successfully");
            } catch (Exception ex) {
                request.setAttribute("message", "File Upload Failed due to " + ex);
            }

        } else {
            request.setAttribute("message",
                    "Sorry this Servlet only handles file upload request");
        }
    }
但我总是有例外:

File Upload Failed due to java.io.FileNotFoundException: 
The system can not find the path
它适用于路径
C:\uploadFolder
的代码,但不适用于上传到
网页
文件夹


为什么?

您想上传到您的Web应用程序中,以便再次下载该文件?对于一些服务引擎

servletRequest.getSession().getServletContext().getRealPath("/")

解析为“真实”文件系统路径(如果应用程序已部署,等等…

是否要上载到Web应用程序中,以便再次下载该文件?对于某些ServletEngine,servletRequest.getSession().getServletContext().getRealPath(“/”)解析为“真实”文件系统路径(如果应用程序已部署或分解等…)@Jan谢谢,它可以工作!在你的网络应用程序中存储图像并不理想。相反,只需在你的网络应用程序之外使用一个特定的位置,并保持其可配置性。积分只是交易的一部分-通过接受回答,你会在某种程度上将该问题标记为“完成”,这样其他愿意帮助的人就不会被吸引到阅读和理解你的问题中,然后读了所有的评论之后才发现,它已经被处理好了。尽管如此,要点还是不错的。现在有了17个,你甚至可以对答案进行投票;-)
servletRequest.getSession().getServletContext().getRealPath("/")