目录

• 使用ModelAndView向request域对象共享数据
• 使用Model向request域对象共享数据
• 使用map向request域对象共享数据
• 使用ModelMap向request域对象共享数据
• Model、ModelMap、Map的关系
• 向session域共享数据
• 向application域共享数据

<a th:href="@{/testModelAndView}" rel="external nofollow" >使用ModelAndView</a>

 /**     * ModelAndView有Model和View的功能     * Model主要用于向请求域共享数据     * View主要用于设置视图，实现页面跳转     */    @RequestMapping("/testModelAndView")    public ModelAndView success(){        ModelAndView modelAndView = new ModelAndView();        modelAndView.addObject("username","gonghr");   //向请求域共享数据        modelAndView.setViewName("success");  //设置视图名称，实现页面跳转        return modelAndView;  //返回    }

sucess<p th:text="${username}"></p>

<a th:href="@{/testModel}" rel="external nofollow" >使用Model</a> <br>

 @RequestMapping("/testModel")    public String testModel(Model model){        model.addAttribute("company","JLU");        return "success";    }

sucess<p th:text="${company}"></p> <br>

<a th:href="@{/testMap}" rel="external nofollow" >使用Map</a> <br>

  @RequestMapping("/testMap")    public String testMap(Map<String, Object> map){        map.put("age","Nineteen");        return "success";    }

sucess<p th:text="${age}"></p> <br>

<a th:href="@{/testModelMap}" rel="external nofollow" >使用ModelMap</a> <br>

 @RequestMapping("/testModelMap")    public String testModelMap(ModelMap modelMap){        modelMap.addAttribute("major","software engineering");        return "success";    }

<p th:text="${major}"></p> <br>

class of ModelAndView:  class org.springframework.web.servlet.ModelAndViewclass of Model:         class org.springframework.validation.support.BindingAwareModelMapclass of Map:           class org.springframework.validation.support.BindingAwareModelMapclass of ModelMap:      class org.springframework.validation.support.BindingAwareModelMap

public class ModelAndView {    @Nullable    private ModelMap model;       public ModelAndView() {    }	    public ModelMap getModelMap() {        if (this.model == null) {            this.model = new ModelMap();        }        return this.model;    }    public ModelAndView addObject(String attributeName, @Nullable Object attributeValue) {        this.getModelMap().addAttribute(attributeName, attributeValue);        return this;    }

public interface Model{}public class ModelMap extends LinkedHashMap<String, Object> {}public class ExtendedModelMap extends ModelMap implements Model {}public class BindingAwareModelMap extends ExtendedModelMap {}

<a th:href="@{/testSession}" rel="external nofollow" >使用Session</a> <br>

 @RequestMapping("/testSession")    public String testSession(HttpSession session){        session.setAttribute("message","session scope");        return "success";    }

<p th:text="${session.message}"></p> <br>

<a th:href="@{/testApplication}" rel="external nofollow" >使用Application</a> <br>

@RequestMapping("/testApplication")    public String testApplication(HttpSession session){        ServletContext application = session.getServletContext();        application.setAttribute("testApplication","hello,application");        return "success";    }

<p th:text="${application.testApplication}"></p> <br>