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5、域对象共享数据

index.html

<a th:href="@{/test/mav}">测试通过ModelAndView向请求域共享数据</a><br>
<a th:href="@{/test/model}">测试通过Model向请求域共享数据</a><br>
<a th:href="@{/test/modelMap}">测试通过ModelMap向请求域共享数据</a><br>
<a th:href="@{/test/map}">测试通过map向请求域共享数据</a><br>
<a th:href="@{/test/session}">测试向会话域共享数据</a><br>
<a th:href="@{/test/application}">测试向应用域共享数据</a><br>
<hr>
<a th:href="@{/test/view/thymeleaf}">测试SpringMVC的视图ThymeleafView</a>
<a th:href="@{/test/view/forward}">测试SpringMVC的视图InternalResourceView</a>
<a th:href="@{/test/view/redirect}">测试SpringMVC的视图RedirectView</a>
</body>

success.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>成功</title>
</head>
<body>
<h1>success.html</h1>
<p th:text="${testRequestScope}"></p>
<p th:text="${session.testSessionScope}"></p>
<p th:text="${application.testApplication}"></p>
</body>
</html>

5.1、使用ServletAPI向request域对象共享数据

@RequestMapping("/testServletAPI") 
public String testServletAPI(HttpServletRequest request){ 
	request.setAttribute("testScope", "hello,servletAPI"); 
	return "success"; 
}

5.2、使用ModelAndView向request域对象共享数据

@RequestMapping("/test/mav")
    public ModelAndView testMAV(){
        /**
         * ModelAndView包含Model和View的功能
         * Model:向请求域中共享数据
         * View:设置逻辑视图实现页面跳转
         */
        ModelAndView mav = new ModelAndView();
        //向请求域中共享数据
        mav.addObject("testRequestScope","hello,ModelAndView");
        //设置逻辑视图
        mav.setViewName("success");
        return mav;
    }

5.3、使用Model向request域对象共享数据

 @RequestMapping("/test/model")
    public String testModel(Model model){
        System.out.println(model.getClass().getName());//org.springframework.validation.support.BindingAwareModelMap
        model.addAttribute("testRequestScope","hello,model");
        return "success";
    }

5.4、使用map向request域对象共享数据

 @RequestMapping("/test/map")
    public String testMap(Map<String,Object> map){
        System.out.println(map.getClass().getName());//org.springframework.validation.support.BindingAwareModelMap
        map.put("testRequestScope","hello,Map");
        return "success";
    }

5.5、使用ModelMap向request域对象共享数据

@RequestMapping("/test/modelMap")
    public String testModelMap(ModelMap modelMap){
        System.out.println(modelMap.getClass().getName());//org.springframework.validation.support.BindingAwareModelMap
        modelMap.addAttribute("testRequestScope","hello,modelMap");
        return "success";
    }

5.6、Model、ModelMap、Map的关系 Model、ModelMap、Map类型的参数其实本质上都是 BindingAwareModelMap 类型的 public interface Model{} public class ModelMap extends LinkedHashMap<String, Object> {} public class ExtendedModelMap extends ModelMap implements Model {} public class BindingAwareModelMap extends ExtendedModelMap {} 在这里插入图片描述

5.7、向session域共享数据

  @RequestMapping("/test/session")
    public String testSession(HttpSession session){
        ServletContext servletContext = session.getServletContext();
        session.setAttribute("testSessionScope","hello,session");
        return "success";
    }

5.8、向application域共享数据

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

SpringMVC学习笔记第5节域对象共享数据