jsp - Cannot iterate through HttpSession after going to the controller for 2nd time -

jsp - Cannot iterate through HttpSession after going to the controller for 2nd time -

in controller have :

switch(testing){ case "display" : arraylist<> list = new arraylist<>(); list.add(filldata) // string values httpsession test = request.getsession(); test.setattribute("testdata",list); test.setmaxinactiveinterval(50000); break; case "read" : arraylist<> list2 = new arraylist<>(); // logic request.setattribute("testdata",list2); break; } requestdispatcher view = request.getrequestdispatcher("/" + page); // jsp page view.forward(request, response);

and in jsp have :

<c:choose> <!-- iteration works , sessionscope.testdata not null. --> <c:when test="${sessionscope.testdata !=null && requestscope.testdata == null> <c:foreach items="${sessionscope.testdata}" var="elems" varstatus="ctr"> <input type="text" value="${lookups}"/> </c:foreach> </c:when> <c:otherwise> <c:foreach items="${requestscope.testdata}" var"inputs" varstatus="count"> <!-- iteration doesnt work , sessionscope.testdata not null when check it. i've checked if sessionscope.testdata null isnt. --> <c:foreach items="${sessionscope.testdata}" var="elems" varstatus="ctr"> <input type="text" value="${lookups}"/> </c:foreach> </c:foreach> </c:otherwise> </c:choose>

test case:

when start page goes controller action = "display". , displays values of session attribute in jsp. on jsp there button calls controller 1 time again passing action = "read". when goes jsp. go <c:otherwise> section , (for illustration requestscope.testdata has 2 values) iterate on requestscope.testdata part. upon next <c:foreach> won't iterate. mentioned above. checked session attribute null, isn't. perchance wrong here won't iterate through session part? help much appreciated. thanks.

jsp session servlets controller jstl