Iterating over an ArrayList with c:foreach (JSP/JSTL), Variable doesn't work

Question

There are countless examples out there for my problem, I know, but I went through a lot of them and can't figure out where my mistake is.

I am iterating over an ArrayList(TestSzenario). The class TestSzenario contains a String Variable called name with proper getters and setters.

Here's my code:

<td><select name="selectSzenario" id="selectSzenario" size="1">
                <c:forEach items="<%=testszenario.getSzenariosForSummary() %>" var="szenario"> 
                    <option>${szenario.name}</option>
                </c:forEach></select></td></tr>

My Problem is, the Variable isn't working. I alwas get ${szenario.name} for every option in the select-box. I declared the JSTL-taglib properly and since there are multiple options in the site when done i know the iteration is working. Also I looked in the HTML-sourcecode an the foreach is resolved.

HTML-output:

        <tr><td>Szenario:</td>
        <td><select name="selectSzenario" id="selectSzenario" size="1">

                    <option>${szenario.name}</option>

                    <option>${szenario.name}</option>
                </select></td></tr>

EDIT for answer 1: Thank you, but I tried that before:

ArrayList<TestSzenario> szenarioList = testszenario.getSzenariosForSummary();
request.setAttribute("aList", szenarioList);
request.setAttribute("ts", testszenario);

<c:forEach items="${aList}" var="szenario">
<option>${szenario.name}</option>
</c:forEach></select></td></tr>

<c:forEach items="${ts.szenariosForSummary}" var="szenario">
<option>${szenario.name}</option>
</c:forEach></select></td></tr>

But in either case it doesn't even iterate through the List, resulting in only 1 option (the List contains 2 elements).

score 9 · Accepted Answer · edited May 23 '17 at 11:51

The <%=testszenario.getSzenariosForSummary() %> will convert the object to String using String#valueOf(Object) method and write it straight to the HTTP response. This is not what you want. Even more, you should not be mixing oldschool scriptlets with modern taglibs/EL at all.

You need to make sure that testszenario is available to EL ${}. So, just set it as an attribute of page, request, session or application scope beforehand in some servlet like so

request.setAttribute("testszenario", testszenario);

Then you can just access it the usual way:

<c:forEach items="${testszenario.szenariosForSummary}" var="szenario">

Iterating over an ArrayList with c:foreach (JSP/JSTL), Variable doesn't work

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