How to use spring validation for ajax request?

Now I have following controller methods:

@ModelAttribute("multipartFileWrapper")
public MultipartFileWrapper createEmployeeModel() {
   return new MultipartFileWrapper();
}

public ResponseEntity<String> handleFileUpload(@Validated MultipartFileWrapper file, BindingResult result, Principal principal, HttpSession session) {
        ResponseEntity<String> responseEntity;

        if (result.hasErrors()) {
           ....

and following bean wrapper for validation:

@Component
public class MultipartFileWrapper {
    @Extensions(imageFormats = {".jpg",".png",".gif",".bmp"}, videoFormats = {".mp4"})
    MultipartFile multipartFile;

    public MultipartFile getMultipartFile() {
        return multipartFile;
    }

    public void setMultipartFile(MultipartFile multipartFile) {
        this.multipartFile = multipartFile;
    }
}

Extensions annotation declaration:

@Documented
@Retention(RUNTIME)
@Constraint(validatedBy = {ExtensionValidator.class})
@Target({ METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER })
public @interface Extensions {

    String message() default "file format is not acceptable";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

    /**
     * Specify accepted content types.
     *
     * @return accepted extensions
     */
    String[] imageFormats();
    String[] videoFormats();
}

and validator:

public class ExtensionValidator implements ConstraintValidator<Extensions, MultipartFile> {

    private String[] acceptedExtensions;

    @Override
    public void initialize(Extensions extensions) {
        //logic
    }

    @Override
    public boolean isValid(MultipartFile value, ConstraintValidatorContext context) {
        //logic
     }
}

and following jsp:

<form:form method="POST"  action="uploadImage" enctype="multipart/form-data" id="imageUploadForm" commandName="multipartFileWrapper" >
 ....
</form:form>

Now I need to validate file which send using ajax.

ajax call:

$(".file").on("change", function() {
        var data = $(this).attr('data');
        if (typeof data !== 'undefined' && data !== false) {
            var image=this.files[0];
            var terminalId=data.replace("file", "");
            var postData = new FormData();
            postData.append('image',image);
            postData.append('terminalId',terminalId);

            $("div[data='errors"+terminalId+"']").hide();
         $.ajax({
             url: "<c:url value='/owner/terminals/uploadImage'/>",
             type: 'POST',
             dataType: 'json',
             processData: false,
             contentType: false,
             data: postData
         })
         .success(function(data) {
             $("div[data='images"+terminalId+"']").prepend ('<div class="photo"> ' +
             '<a class="fancy_image" href="<c:url value="/owner/createCompany/getOriginalImage/"/>'+data+'"><img src="<c:url value="/owner/createCompany/getSmallThumbnail/"/>'+data+'" alt=""/></a>'+'<div class="close-image" data="'+data+'"></div></div>');
             $("li#terminal"+terminalId).find("img").attr("src","<c:url value='/owner/createCompany/getSmallThumbnail/'/>"+data);
             $("li#terminal"+terminalId + " .fancy_image").attr("href", $("li#terminal"+terminalId + " .fancy_image").attr("href")+data);
          })
         .fail(function() {
                $("div[data='errors"+terminalId+"']").show();
              });


        } 

    });

How can I make it? Is it possible to reuse my current code?