<!-- language: lang-java -->
@ResponseStatus(OK)
@RequestMapping(value = {"/v1/transform"}, method = RequestMethod.POST)
@ResponseBody
public TransformIdDTO transformFile(
@RequestPart("file") MultipartFile []  multipartFile,
@RequestParam("from") String from,
@RequestParam("to") String to,
final HttpServletResponse response) throws IOException, MessagingException

<!-- language: lang-java -->
HttpClient client = new HttpClient();
PostMethod method1 = new PostMethod("URI");
Part[] parts = {new FilePart("file", f),new StringPart("from","html"),new StringPart("to","PDF")};
method1.setRequestEntity(new MultipartRequestEntity(parts, method1.getParams()));
int returnCode = client.executeMethod(method1);
System.out.println(returnCode);