ModelAndView 和 Model ModelMap 返回值區別

當直接跳轉到jsp頁面（或forward）時，三個對象功能同樣。web ModelAndView mav = new ModelAndView(); mav.addObject("msg","hello world!"); model 和modelMap同樣，看源碼可知：modelMap是model的實現類。jsp model.addAttribute("msg", "hello world!")

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