Can't get file name? Always null

HTML

                        <form enctype="multipart/form-data" method="post" action="addCompany">
                            <fieldset>
                                <legend>Add Company</legend>
                                <br/>
                                <label>Company Name:</label>
                                <input name="name" size="30" type="text"/>
                                <br/>
                                <label>Company Logo:</label>
                                <input name="file" size="30" type="file"/>
                                <br/>
                                <span id="updateError" class="errorMessage"></span>
                                <button type="submit" class="jUiButton">Submit</button>
                            </fieldset>
                        </form>     
                        <script>$(".jUiButton").button()</script>

Java Servlet

// Check that we have a file upload request
        boolean isMultipart = ServletFileUpload.isMultipartContent(request);
        if(isMultipart && request.getContentType() != null)
        {
            // Create a factory for disk-based file items
            FileItemFactory factory = new DiskFileItemFactory();

            // Create a new file upload handler
            ServletFileUpload upload = new ServletFileUpload(factory);

            // Parse the request
            List /* FileItem */ items = null;
            try
            {
                items = upload.parseRequest(request);
            }
            catch(FileUploadException e) {}

            // Process the uploaded items
            Iterator iter = items.iterator();

            FileItem cvFile = null;
            while(iter.hasNext())
            {
                FileItem item = (FileItem)iter.next();

                if(item.isFormField())
                {
                    if(item.getFieldName().equals("name"))
            开发者_如何学JAVA            name = item.getString();
                }
                else
                {
                    cvFile = item;
                }

                if(name != null && cvFile != null)
                {
                    directoryName = request.getRealPath("/") + "/Uploads/Companies/" + name + "/";
                    File theDir = new File(directoryName);
                    if (!theDir.exists())
                        theDir.mkdir();

                    File uploadedFile = new File(directoryName + cvFile.getName());
                    try
                    {
                        cvFile.write(uploadedFile);
                    }
                    catch(Exception e) {}
                }
            }

I get a null exception here (in the last if statement):

File uploadedFile = new File(directoryName + cvFile.getName());

---

You have a problem with your code (and I'm not even a Java guy).

FileItem cvFile = null;

You set cvFile to null here.

while(iter.hasNext())
{
   FileItem item = (FileItem)iter.next();

   if(item.isFormField())
   {
     if(item.getFieldName().equals("name"))
        name = item.getString();
   }
   else
   {
      cvFile = item;
   }

If the first branch of the if is take (item.isFormField()), cvFile remains null (its value never changes from where it was initialized).

File uploadedFile = new File(directoryName + cvFile.getName());

You use cvFile.getName() here, but cvFile may still be null.

---

Where do you set cvFile.name to something, either via setName or otherwise? I think your name is null. I don't see it set on item. I think see cvFile is assigned to an object, but the name object you try access via getName is null.