wicket获得原始的HttpServletRequest 和HttpServletResponse

Form form2 = new Form("form2"){
public void onSubmit() {
//可以通过如下代码获得原始的HttpServletRequest 和HttpServletResponse
HttpServletRequest request=getWebRequestCycle().getWebRequest().getHttpServletRequest();
HttpServletResponse res=getWebRequestCycle().getWebResponse().getHttpServletResponse();

String user=request.getParameter("user");
System.out.println(user);

//如何获得原始的HttpSession
HttpSession session=request.getSession();

}
};
this.add(form2);