SPRING REST: The request was rejected because no multipart boundary was found

I did a POC for spring 3 rest multipart file upload. Its working fine. But when i tried integrating with my application i am facing issues.

It throws following exception:

org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request;
nested exception is org.apache.commons.fileupload.FileUploadException:
the request was rejected because no multipart boundary was found**"

Please let me know if I am wrong in any part of my code.

Beans:

<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<property name="order" value="1" />
<property name="mediaTypes">
<map>
<entry key="json" value="application/json" />
<entry key="xml" value="application/xml" />
<entry key="file" value="multipart/mixed" />
</map>
</property>
</bean>
<!-- multipart resolver -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- one of the properties available; the maximum file size in bytes -->
<property name="maxUploadSize" value="50000000" />
</bean>
Controller:


@Controller
public class MultipleFilesRecieve {
@RequestMapping ( value = "/saveMultiple", method = RequestMethod.POST )
public String save( FileUploadForm uploadForm ) {
List<MultipartFile> files = uploadForm.getFiles( );
List<String> fileNames = new ArrayList<String>( );
if ( null != files && files.size( ) > 0 ) {
for ( MultipartFile multipartFile : files ) {
String fileName = multipartFile.getOriginalFilename( );
fileNames.add( fileName );
}
}
return "multifileSuccess";
}
}