@RequestMapping(value = "info")
    @ResponseBody
    public String getRequestContextInfo() {
        return helloService.getReqInfo();
    }

 public String getReqInfo() {
        //   在service中获取HttpServletRequest
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.currentRequestAttributes()).getRequest();
        String info = request.getParameter("name");
        return StringUtils.isEmpty(info) ? "Name is Empty." : "Name is " + info;
    }

当请求为http://localhost:8080/info时，返回Name is Empty.
当请求为http://localhost:8080/info?name=zhangsan时，返回Name is zhangsan

需要注意的是，当mvc方法中注入的request类型为MultipartHttpServletRequest类型时，即文件上传时，通过以上方法是获取不到参数值的。需要将request对象转为MultipartHttpServletRequet。