public ModelAndView testHello5(ModelAndView mv){
mv.setViewName("data");//data.jsp 默认在WEB-INF下面
mv.addObject("age", 19);
return mv;
public ModelAndView testHello6(){
return new ModelAndView("data","age",20);
}
public ModelAndView testHello7(){
return new ModelAndView("data");
}