s：地图列表上的迭代器

listMaps List<Map<String,Object>>

s:iterator

<s:iterator value="lastMaps" var="listMap" status="st">  
    test 1 <img src="<%=request.getContextPath()%>/image/%{#listMap.key}.jpg" />
    test 2 <img src="<%=request.getContextPath()%>/image/%{'lastMaps['+#st.index+'].key'}.jpg" />
    test 3 <img src="<%=request.getContextPath()%>/image/%{top['key']}.jpg" />
</s:iterator>

%{''}

<img src="<%=request.getContextPath()%>/image/<s:property value="%{#listMap.key}"/>".jpg" />