ModelAndView 和 Model ModelMap 返回值区别

当直接跳转到jsp页面（或forward）时，三个对象功能同样。web ModelAndView mav = new ModelAndView(); mav.addObject("msg","hello world!"); model 和modelMap同样，看源码可知：modelMap是model的实现类。jsp model.addAttribute("msg", "hello world!")

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