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## Using FileUpload

Your application should detect whether or not FileUpload should be invoked, based on the HTTP method and the content type of the request.

Assuming that you have decided that FileUpload should be invoked, you might write the following code to handle a file upload request:

        // Create a new file upload handler
        DiskFileUpload upload = new DiskFileUpload();

        // Set upload parameters
        upload.setSizeMax(MAX_UPLOAD_SIZE);
        upload.setSizeThreshold(MAX_MEMORY_SIZE);
        upload.setRepositoryPath(TEMP_DIR);

        // Parse the request
        List items = upload.parseRequest(request);

        // Process the uploaded fields
        Iterator iter = items.iterator();
        while (iter.hasNext()) {
            FileItem item = (FileItem) iter.next();

            if (item.isFormField()) {
                processTextParameter(request, item);
            } else {
                processFileParameter(request, item);
            }
        }