如何从主 jsp 页面获取 tiles jsp 页面的地图值

Question

实际上，我正在尝试将地图值从 mainpage.jsp 页面获取到图块页面 lhsListing.jsp。有没有办法传递地图对象。下面是我的代码请帮我找人。

mainPage.jsp

<c:forEach var="lhsSrcMap" varStatus="status" items="${lhsListMap}">  
  <tiles:insert page="/jsp/common/lhsListing.jsp" >  
  <tiles:put name="lhsSrcMap" value="${lhsSrcMap}"/>
</tiles:insert>

lhsListing.jsp

<c:set var="lhsSrcMap"><tiles:get name="lhsSrcMap"/></c:set>
<c:forEach var="fieldRec" varStatus="status"items="${lhsSrcMap.value['LIST']['SRC_DTL_MAPS_LIST']['FIELD_LIST']}" > 

//something  

</c:forEach>

页面显示错误：

Can't insert page '${lhsSrcMap}' : null [ServletException in:/jsp/common/lhsListing.jsp] An error occurred while evaluating custom action attribute "items" with value "${lhsSrcMap.value['LIST']['SRC_DTL_MAPS_LIST']['FIELD_LIST']}": Unable to find a value for "value" in object of class "java.lang.String" using operator "." (null)'

Answer 1

I got a solution for my question.
we can use Implicit Objects of the Unified Expression Language.

I used scope="request" in JSTL.

mainpage.jsp

<c:forEach var="lhsSrcMap" varStatus="status" items="${lhsListMap}">  
   <c:set var="tileLhsSrcMap" value="lhsSrcMap" scope="request"/>
   <tiles:insert page="/jsp/common/lhsListing.jsp" >  
   
   </tiles:insert>
</c:forEach>

lhsListing.jsp

<c:forEach var="fieldRec" varStatus="status" items="${tileLhsSrcMap.value['LIST']['SRC_DTL_MAPS_LIST']['FIELD_LIST']}" > 

//something  

</c:forEach>

或使用requestScope

lhsListing.jsp

<c:forEach var="fieldRec" varStatus="status" items="${requestScope.tileLhsSrcMap.value['LIST']['SRC_DTL_MAPS_LIST']['FIELD_LIST']}" > 

//something  

</c:forEach>

如何从主 jsp 页面获取 tiles jsp 页面的地图值

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