除了使用ModelAndView方式外还可以使用Map、Model和ModelMap来向前台页面传值
使用后面3种方式,都是在方法参数中,指定一个该类型的参数。例如:@RequestMapping("/test")
public String test(Map<String,Object> map,Model model,ModelMap modelMap){
map.put("names", Arrays.asList("caoyc","zhh","cjx"));
model.addAttribute("time", new Date());
modelMap.addAttribute("city", "ChengDu");
modelMap.put("gender", "male");
mv.addObject("name", "张三");
return "hello";
}
JSP页面
1、time:${requestScope.time} <br/>
2、names:${requestScope.names } <br/>
3、city:${requestScope.city } <br/>
4、gender:${requestScope.gender }
model.addAttribute("cusType", session.getAttribute("cusType")); //从session获取放到model域中, 并清楚session的值
session.removeAttribute("cusType");
除了使用ModelAndView方式外 (有局限性, 必须返回ModelAndView )。
@RequestMapping(value = "login")
public ModelAndView login(){
ModelAndView mav = new ModelAndView();
mav.setViewName("welcome"); //跳转到 welcome.jsp
mav.addObject("msg", "hello kitty");
return mav;
}