freemarker map嵌套

Menu menu1 = new Menu();

menu1.setMenuName("menu");

menu1.setMenuUrl("url");

 

Menu menu2 = new Menu();

menu2.setMenuName("menu");

menu2.setMenuUrl("url");

 

List list = new ArrayList();

Menu subMenu1 = new Menu();

subMenu1.setMenuName("submenu");

subMenu1.setMenuUrl("url");

 

Menu subMenu2 = new Menu();

subMenu2.setMenuName("menu");

subMenu2.setMenuUrl("url");

 

 

list.add(subMenu1);

list.add(subMenu2);

map.put(menu1,list);

map.put(menu2,list);

 

request.setAttribute("menuMap",map);

 

 

 

在頁面jsp中使用freemarker標籤

<#list menuMap?keys as menuKeys>

       <li>${menuKeys.name}</li>

      <ul>

          <#assign values_ = menuMap[menuKeys]>
           <#list values_ as menu>
            <li>
                    ${menu.menuName }
             </li>
              </#list>

            報錯

           Expression menuKey.memuName is undefined on line 17, column 51 in jsp/freemarker/menu.jsp.
          The problematic instruction:
         ----------
             ==> ${menuKey.memuName } [on line 17, column 49 in jsp/freemarker/menu.jsp]
             ----------

          Java backtrace for programmers:
          ----------
              freemarker.core.InvalidReferenceException: Expression menuKey.memuName is undefined on line 17, column  51 in jsp/freemarker/menu.jsp.
    at freemarker.core.TemplateObject.assertNonNull(TemplateObject.java:124)
    at freemarker.core.Expression.getStringValue(Expression.java:118)
    at freemarker.core.Expression.getStringValue(Expression.java:93)
    at freemarker.core.DollarVariable.accept(DollarVariable.java:76)
    at freemarker.core.Environment.visit(Environment.java:208)
    at freemarker.core.MixedContent.accept(MixedContent.java:92)
    at freemarker.core.Environment.visit(Environment.java:208)

 

 

 

            在這裡怎樣遍曆menuMap中value的值......

     </ul>

</#list>