使用Model和ModelMap的效果一样,如果直接使用Model,springmvc会实例化ModelMap。
如果使用Model则可以不使用ModelAndView对象,Model对象可以向页面传递数据,View对象则可以使用String返回值替代。不管是Model还是ModelAndView,其本质都是使用Request对象向jsp传递数据。
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