jsp jsp:useBean 在第二個jsp頁面訪問第一個jsp頁面中產生的ArrayList

i would like to do the following but i cannot access the ArrayList via
the JSP. could anyone help?

1. use the doView()- method to store an ArrayList in the session
================================================== ===============
doView(){
....
MySimpleBean my1 = new MySimpleBean();
my1.setMessage("test1");
MySimpleBean my2 = new MySimpleBean();
my2.setMessage("test2");
ArrayList mySimpleBeans = new ArrayList();
mySimpleBeans.add(my1);
mySimpleBeans.add(my2);
request.getPortletSession().setAttribute("jens", mySimpleBeans,
PortletSession.PORTLET_SCOPE);
....
}

2. access this bean from the JSP (this does not work)
================================================== ===============
<%@ page session="true" contentType="text/html"
import="java.util.*,javax.portlet.*,
com.linde.portal.application.domino.pike.navigatio n.*" %>
<%@ taglib uri="http://java.sun.com/portlet" prefix="portlet"%>
<%@ taglib uri="http://java.sun.com/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jstl/fmt" prefix="fmt"%>
<portlet:defineObjects />

<jsp:useBean id="jens"
class="com.linde.portal.application.domino.pike.na vigation.MySimpleBean"
scope="session"></jsp:useBean>

<table>
<c:forEach var="mySimpleBean" items="${jens}">
<tr>
<td><cut value="${mySimpleBean.message}"/></td>
</tr>
</c:forEach>
</table>

3. this code works...
================================================== ===============
....
<%
ArrayList jens2 = null;
try {
PortletSession mySession = renderRequest.getPortletSession();
jens2 = (ArrayList) mySession.getAttribute("jens",
PortletSession.PORTLET_SCOPE);}
catch (Exception e){
e.printStackTrace(System.out);
} %>
<%
if (jens2 != null){
%>
<%= ((MySimpleBean)jens2.get(0)).getMessage() %>
<%} else { %>
<%= "empty" %>
<%} %>

=============

Posts: n/a

Re: jsp:useBean - access ArrayList containing beans? i looked at it once more and noticed the following which seems to be related to the problem. i can access the attribute "jens2" in the jsp but i cannot access the attribute "jens3". there will be an empty string cerated for "jens3". can you explain me why? thanks! Portlet ================================================== =============== doView(){... request.setAttribute("jens2", "REQUEST hello world"); request.getPortletSession().setAttribute("jens3", "SESSION hello world"); ....} JSP ================================================== =============== <jsp:useBean id="jens2" class="java.lang.String" scope="request"></jsp:useBean> <jsp:useBean id="jens3" class="java.lang.String" scope="session"></jsp:useBean> ....