SpringMVC中model,modelMap.request,session取值顺

Model model,HttpServletRequest request, ModelMap map声明变量 

request.getSession().setAttribute("test", "haiwei2Session"); 
request.setAttribute("test", "haiwei1request");
map.addAttribute("test", "haiweiModelMap"); 
model.addAttribute("test", "haiweiModel"); 

我通过${test}这个方式取值，优先取Model和ModelMap的，Model和ModelMap是同一个东西，谁最后赋值的就取谁的，然后是request，最后是从session中获取 

载自：http://haiwei2009.iteye.com/blog/779378