springMVC中得到request对象，session对象

    RequestAttributes ra = RequestContextHolder.getRequestAttributes();
    HttpServletRequest request = ((ServletRequestAttributes)ra).getRequest();
    request.getSession().setAttribute("sessionMessage", "im‘sessionMessage!");  

也可以让所有的Control继承一个BaseControl类 ，BaseControl类的定义为：

public class BaseControl{

protected HttpServletRequest request ;

protected HttpServletResponse response ;

protected HttpSession session ;

// setter ... getter...

//.......

}

@Component("SpringMVCInterceptor")
public class SpringMVCInterceptor extends HandlerInterceptorAdapter {

@Override
public boolean preHandle(HttpServletRequest request,
HttpServletResponse response, Object handler) throws Exception {

BaseControl bc = (BaseController)handler ;
   bc.setRequest(request);

bc .setResponse(response);

bc.set Session(request.getSession());
return super.preHandle(request, response, handler);
}