The origin server did not find a

如下代码：

@RequestMapping("say")
public ModelAndView hello() {
    System.out.println("hello is run");
    ModelAndView modelAndView = new ModelAndView();
    modelAndView.setViewName("/WEB-INF/jsp/hello.jsp");
    modelAndView.addObject("msg", "hello springmvc...");
    return modelAndView;
}

跳转至hello.jsp页面，却报：

最终发现问题是由于ModelAndView导包错误，太马虎了，记录下！

import org.springframework.web.portlet.ModelAndView;
import org.springframework.web.servlet.ModelAndView;(应该使用这个)