HttpServletRequest object in Spring webflow?

How to get HttpServletRequest 开发者_运维知识库object in FlowController?

I am trying to retrieve request object from getNativeRequest() method,But it is not giving HttpServletRequest object.

(HttpServletRequest)RequestContextHolder.getRequestContext().getExternalContext().getNativeRequest()  

I followed above approach, It's returning SRTServletRequest object.

Correct me if I'm wrong, but SRTServletRequest implements HttpServletRequest, so you should just be able to cast it.