Error uploading file from form-data to Spring Server

I am uploading a picture using form-data taking the picture from the Client's PC to Spring MVC Server.

Update Page:

<!DOCTYPE html >
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Spring MVC - Upload File</title>
</head>
<body>
<form id="form1" method="post" action="/upload" enctype="multipart/form-data" accept-charset="utf-8">
<!-- File input -->     
<input name="file" id="file" type="file" /><br/>
<input type="submit" value="Upload" />
</form>
</body>
</html>

And this is the Spring Controller

 @RequestMapping(value = "upload", method = RequestMethod.POST)
 public @ResponseBody
 String provaUpdate(MultipartHttpServletRequest request,Principal p,HttpServletResponse response)throws IOException {
 String result="";
 LocalFileManager mLocalFileManager = LocalFileManager.get();
 Iterator<String> iterator = request.getFileNames();
     while(iterator.hasNext())
     {
         System.out.println("iterator.next()="+iterator.next());
     }
         System.out.println("request.getFileMap().isEmpty()??"+request.getFileMap().isEmpty());
       //  mLocalFileManager.saveLocalData(g,g.getPicturesCount(), request.getFile("new").getInputStream());
    return result;
 }

So, when i run that, it just prints:

request.getFileMap().isEmpty()??true

Then, no Files seems to be uploaded, but if I get the request.getInputStream() I can write a TXT File showing that:

------WebKitFormBoundaryWG8vA5PuTFFxPBqK
Content-Disposition: form-data; name="file"; filename="1.jpg"
Content-Type: image/jpeg
�� JFIF      ��ICC_PROFILE   蠠     mntrRGB XYZ ٠   $ acsp                             ��    ӭ    )𽞯򕮸B򤊃9
                               desc  D   ybXYZ     bTRC  Ԡ dmdd     ࠠ ɧXYZ  
h   gTRC  Ԡ lumi  
|   meas  
 //(Symbols)  Long ETC, so the picture is sent !!
------WebKitFormBoundaryWG8vA5PuTFFxPBqK--

So, seems that the picture is sent correctly but the MultipartHttpServletRequest is not able to get the File.

Which is my mistake?

Solution

The mistake was that i am working with Thymeleaf, so the form is different.

It is solved changing that:

1- Create a class that contains a MultipartFile, like this:

public class Images {
MultipartFile image;
public MultipartFile getImage() {
return image;
}
public void setImage(MultipartFile image) {
this.image = image;
}
}

2- The correct form code for a Spring Server working with Thymeleaf:

<form id="myform"  action="#"  th:action="@{/upload}" th:object="${Images}"     method="POST" modelAttribute="Images"  enctype="multipart/form-data">
<input type="file"   th:field="${Images.image}"  name="file"/>
<input type="submit" value="Upload"/>
</form>

And finally the correct Controller method:

@RequestMapping(value = "upload", method = RequestMethod.POST)
public String addVocabularyValadate( @ModelAttribute("Images") Images images,BindingResult bindingResult,
                    Model model) throws IOException 
{
System.out.println("inputstream Nombre!"+images.getImage().getOriginalFilename());
if(bindingResult.hasFieldErrors() == true)
return "error";
else
return "upload OK!";
}