<%

Map<String,String> map2 = new HashMap();

map2.put("a","hello world");

map2.put("b","this is map");

request.setAttribute("map2",map2);

%>   

<c:forEach var="item" items="${map2}">

${item.key} > ${item.value} <br>

</c:forEach>  

<c:forEach var="item" items="${map2}">

${item.key}<br>

</c:forEach>  

<c:forEach var="item" items="${map2}">

${item.value}<br>

</c:forEach>   

<%

List<String> list = new ArrayList<String>();

list.add("first");

list.add("second");

List<String> list2 = new ArrayList<String>();

list2.add("aaaaaa");

list2.add("bbbbbb");

Map<String,List<String>> map = new HashMap();

map.put("a",list);

map.put("b",list2);

request.setAttribute("map",map);

%>  

<c:forEach var="item" items="${map['a']}">

${item }<br>

</c:forEach><br>

<c:forEach var="item" items="${map['b']}">

${item }<br>

</c:forEach> 

<c:forEach var="item" items="${map}">

<c:forEach items="${item.value}" var="it">

${it }<br>

</c:forEach>

</c:forEach>