springMVC如何將controller中數(shù)據(jù)傳遞到j(luò)sp頁(yè)面

newModelAndView("/WEBINF/jsp/showData.jsp","message",message)

@RequestMapping(value="/mad/showData_1.do")
public ModelAndView showData_1(){
  String message = "這個(gè)是要傳遞的數(shù)據(jù)";
  /*其中第一個(gè)參數(shù)為url,第二個(gè)參數(shù)為要傳遞的數(shù)據(jù)的key,第三個(gè)參數(shù)為數(shù)據(jù)對(duì)象。在這里要注意的是:數(shù)據(jù)是默認(rèn)被存放在request中的。*/
  return new ModelAndView("/WEB-INF/jsp/showData.jsp","message",message);
}

request:${requestScope.message}

@SessionAttributes({“message”,”user”})

session:${sessionScope.message}<br/>

//使用modelAndView對(duì)象將數(shù)據(jù)傳遞到前臺(tái)。
//傳遞多個(gè)參數(shù)（不同類型的）
  @RequestMapping(value="/mad/showData_2.do")
  public ModelAndView showData_2(){
   System.out.println("showData_2");
   String message = "這個(gè)是要傳遞的數(shù)據(jù)";
   User user = new User("張三", 12, new Date());
   List<User> us= new ArrayList<User>();
   us.add(new User("張三", 12, new Date()));
   us.add(new User("張四", 13, new Date()));
   us.add(new User("張五", 14, new Date()));
   ModelAndView mad = new ModelAndView("/WEB-INF/jsp/showData.jsp");
   //將數(shù)據(jù)存入modelMap
   mad.addObject("message", message);
   mad.addObject(user);//默認(rèn)為類名的首字母小寫(xiě)
   mad.addObject("users", us);
   return mad;
 }

request:${requestScope.message}<br/>
<c:forEach items="${requestScope.users }"var="u">
   ${u.name }-${u.age }-${u.birth }<br/>
  </c:forEach>

//使用modelMap對(duì)象將數(shù)據(jù)傳遞到前臺(tái)。
  //傳遞多個(gè)參數(shù)（不同類型的）
  @RequestMapping(value="/mad/showData_3.do")
  public String showData_3(ModelMap map){
   System.out.println("showData_3");
   String message = "這個(gè)是要傳遞的數(shù)據(jù)";
   User user = new User("張三", 12, new Date());
   List<User> us= new ArrayList<User>();
   us.add(new User("張三", 12, new Date()));
   us.add(new User("張四", 13, new Date()));
   us.add(new User("張五", 14, new Date()));
   //將數(shù)據(jù)存入modelMap
   map.put("message", message);
   map.addAttribute("user", user);
   map.put("users", us);
   return"/WEB-INF/jsp/showData.jsp";
  }

request:${requestScope.message}<br/>
  session:${sessionScope.message }<br/>
  application:${applicationScope.message}<br/>
  <hr/>
  <h2>ModelMap中的數(shù)據(jù)</h2>
  ${requestScope.message}<br/>
  ${requestScope.user.name}<br/>
  <p>列表</p>
  <c:forEach items="${requestScope.users}" var="u">
   ${u.name }-${u.age }-${u.birth }<br/>
  </c:forEach>