Servlet 问题 请高手 解决 谢谢！！

Question

如何用El表达式获得HashMap中的值
如
 <c:forEach items="${gwc}" var="shop">
          <tr>
          
            <td><div align="center"></div>${shop.edition}</td>
            <td><div align="center"></div>${shop.prices}</td>
            <td><div align="center"></div>${shop.cnt}</td>
            <td><div align="center"></div></td>
          </tr>
          </c:forEach>
${shop.什么}

Answer 1

shop.是一个对象
去取他的属性

Answer 2

通过EL取HASHMAP里面的值。<c:foreach items="{hashs}" var="hash">
   ${hash.key}//取键
    ${hash.value}//取值
</c:foreach>

Answer 3

是用EL表达式取shop对象中的属性

Answer 4

报了这个异常
javax.servlet.ServletException: Unable to find a value for "edition" in object of class "java.util.HashMap$Entry" using operator "."
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
org.apache.jsp.shopping_jsp._jspService(org.apache.jsp.shopping_jsp:142)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:322)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)