@ResponseBody
    @RequestMapping("/testHttpMessageConverter")
    public String testHttpMessageConverter(@RequestBody String body){
        System.out.println(body);
        return "helloworld! " + new Date();
    }

    <form action="testHttpMessageConverter" method="POST" enctype="multipart/form-data">
        File: <input type="file" name="file"/>
        Desc: <input type="text" name="desc"/>
        <input type="submit" value="Submit"/>
    </form>