org.springframework.web.servlet.ModelAndView#hasView ( )源码实例Demo

@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView mav) {
	HttpSession session = request.getSession();

	if (session != null) {
		Message message = (Message) session.getAttribute(Message.ATTRIBUTE_KEY);
		if (message != null && !mav.getModelMap().containsKey(Message.ATTRIBUTE_KEY)) {
			mav.addObject(Message.ATTRIBUTE_KEY, message);
		}

		boolean shouldRemove = true;
		if (mav.hasView() && mav.getView() instanceof RedirectView) {
			shouldRemove = false;
		}
		if (mav.getViewName() != null && mav.getViewName().startsWith("redirect:")) {
			shouldRemove = false;
		}

		if (shouldRemove) {
			session.removeAttribute(Message.ATTRIBUTE_KEY);
		}
	}
}
 

@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    if (modelAndView == null || !modelAndView.hasView()) {
        return;
    }
    String originalViewName = modelAndView.getViewName();
    if (isRedirectOrForward(originalViewName)) {
        return;
    }
    modelAndView.setViewName(DEFAULT_LAYOUT);
    modelAndView.addObject(DEFAULT_VIEW_ATTRIBUTE_NAME, originalViewName);
}
 

@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
    if (modelAndView == null || !modelAndView.hasView()) {
        return;
    }

    String originalViewName = modelAndView.getViewName();
    if (isRedirectOrForward(originalViewName)) {
        return;
    }
    String layoutName = getLayoutName(handler);
    modelAndView.setViewName(layoutName);
    modelAndView.addObject(this.viewAttributeName, originalViewName);
}