private CommonsMultipartFile fileData;

    @NotEmpty(message = "The field must not be empty")
    @Pattern(regexp = ".+\\.{1}xml", message = "The file must have .xml extension")
    private String fileName;
    
    public CommonsMultipartFile getFileData() {
        return fileData;
    }

    public void setFileData(CommonsMultipartFile fileData) {
        this.fileData = fileData;
        setFileName(fileData);
    }

    public String getFileName() {
        return fileName;
    }

    public void setFileName(CommonsMultipartFile fileData) {
        this.fileName = fileData.getOriginalFilename();
    }

@Autowired
private Validator validator;

@Override
    public boolean upload(ItemUploadForm uploadForm, BindingResult result) {
        validator.validate(uploadForm, result);
        if(result.hasErrors()) {
            return false;
        }
        return true;
    }

<form:form commandName="<%=UPLOAD_COMMAND%>" method="post" enctype="multipart/form-data">
            <form:label for="fileData" path="fileData">File</form:label>
            <form:input path="fileData" type="file" />
            <form:errors path="fileName" />


            <input type="submit" value="Submit" />
        </form:form>