SpringMVC之ModelAndView

一、SpringMVC输出模型数据的几种常见途径

　　1、ModelAndView

@Controller
public class SpringmvcDemo {

    @RequestMapping(value = "/testModelAndView", method = RequestMethod.GET)
    public ModelAndView testSpringMVC() {
        // 使用ModelAndView的方式
        ModelAndView mav = new ModelAndView();
        mav.addObject("username", "damaomao");
        mav.setViewName("testModelAndView");
        System.out.println("测试ModelAndView");
        return mav;
    }
}

　　2、Map<Object,Object>集合

@Controller
public class SpringmvcDemo {

    @RequestMapping(value = "/testModelAndView", method = RequestMethod.GET)
    // 使用返回值是String类型,参数为map
    public String testSpringMVC01(Map<String,Object> map) {
        map.put("user01","xiaomao");
        map.put("user02","xiaomaomao");
        map.put("user03","xiaoxiaomaomao");
        return "testModelAndView";
    }
}

　　3、Model对象

@Controller
public class SpringmvcDemo {

    @RequestMapping(value = "/testModelAndView", method = RequestMethod.GET)
    // 使用返回值是String类型,参数为Model
    public String testSpringMVC01(Model model) {
        HashMap<String, Object> hashMap = new HashMap<>();
        hashMap.put("user01","haha");
        hashMap.put("user02","hehe");
        hashMap.put("user03","heihei");
        model.addAllAttributes(hashMap);
        return "testModelAndView";
    }
}

二、处理Model源码参考