SpringMVC之ModelAndView

本文轉載自查看原文 2020-09-01 23:54 723 Springmvc

一、SpringMVC輸出模型數據的幾種常見途徑

　　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("測試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類型,參數為map
    public String testSpringMVC01(Map<String,Object> map) {
        map.put("user01","xiaomao");
        map.put("user02","xiaomaomao");
        map.put("user03","xiaoxiaomaomao");
        return "testModelAndView";
    }
}

　　3、Model對象

@Controller
public class SpringmvcDemo {

    @RequestMapping(value = "/testModelAndView", method = RequestMethod.GET)
    // 使用返回值是String類型,參數為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、處理Model源碼參考