<%@ page import="java.util.Map" %>
<%@ page import="java.util.HashMap" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

<%
Map map = HashMap;
map.put("a", "12345");
map.put("b", "abcde");
out.prln(map.get("a"));
request.Attribute("map",map);
%>
<c:forEach items="${map}" var="mymap" >
<c:out value="${mymap.key}" />
<c:out value="${mymap.value}" />
</c:forEach>

<c:forEach items="${map}" var="mymap">
<c: test="${mymap.key'a'}">
<c:out value="${mymap.value}"/>
</c:>
</c:forEach>