Uploading files with Java

Question

Good morning! I was trying to upload files, where I have a web page that makes a request to my Folder. In the form of the page I have an input of type file and another of type text. The encoding mode of this form is as "Multipart/form-data". My great difficulty is that all the examples I’ve seen of using package org.apache.Tomcat.util.http.fileupload have the following snippet of code:

    try
    { 
        // Analisar a solicitação para obter itens de arquivo.
        List <FileItem>fileItems = upload.parseRequest(request);

        // Processar os itens de arquivos enviados
        Iterator <FileItem> i = fileItems.iterator();

However in my case occurs the error of the image below:

The method parseRequest(Requestcontext) in the type Fileuploadbase is not applicable for the Arguments (Httpservletrequest)

If anyone has any suggestions or has ever had the same problem and can help me, I appreciate it. Or if you have any other more recommended method of uploading files in java I am accepting tips, because this is the first time I am studying about it.

Hugs.

Answer 1

The parseRequest (Requestcontext ctx) hopes that the RequestContext is an argument, but the approved argument is an instance of HttpServletRequest

Use Servletrequestcontext to create a Requestcontext instance as follows.

List<FileItem> items = upload.parseRequest(new ServletRequestContext(request));

https://stackoverflow.com/questions/27466194/error-in-file-uploading-code

Answer 2

The function method you are calling is waiting for an object of another type.

Try to do according to the example below:

protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {

        /*Obtem o caminho relatorio da pasta img*/
        String path = request.getServletContext().getRealPath("img")+ File.separator;

        File files = new File(path);
        response.setContentType("image/jpeg");

        /*Mostra o arquivo que está na pasta img onde foi realizado o upload*/
        for (String file : files.list()) {
            File f = new File(path + file);
            BufferedImage bi = ImageIO.read(f);
            OutputStream out = response.getOutputStream();
            ImageIO.write(bi, "jpg", out);
            out.close();
        }
    }