如何赋值 <s:radio> 到另一个变量使用 <s:set> 在struts2

Question

I'm trying to assign the value of radio button ans1 to another variable ans_submit .

<s:form action="ques2" namespace="/questions" theme="simple">

    Question 1: <s:property value="#session.ques1.question"/><br/><br/>

<s:radio list="#session.ques1.option1" name="ans1" value="%{'option1'}" label="1. "/><br/>
<s:radio list="#session.ques1.option2" name="ans1" value="%{'option2'}" label="2. "/><br/>
<s:radio list="#session.ques1.option3" name="ans1" value="%{'option3'}" label="3. "/><br/>
<s:radio list="#session.ques1.option4" name="ans1" value="%{'option4'}" label="4. "/><br/>

    <s:submit name="submit" value=" Next"/>

</s:form>

<s:set var="ans_submit" value="%{#ans1}" scope="session" />

But when I retrieve ans_submit in action class, it is giving null .
I have to keep <s:set> tag outside of <s:form> tag. Because there is no variable defined as such in my model. I don't want to use javascript!

Answer 1

Use a map to populate a radio tag.

<s:radio name="ans1" list="#{'option1': '1. ','option2': '2. ','option3': '3. ','option4': '4. '}" />

In the action class you should have a property for ans1 where the value would be set when you submit the form. This property is local to the action instance which is created every time when you make a new request. So, you need to save the value in the session.

session.put("ans1", ans1);  

Now to retrieve this value from session in another action you can initialize the ans1 property

ans1 = (String) session.get("ans1");

or you can preset the value in the radio tag using a value attribute.

<s:radio name="ans1" list="#{'option1': '1. ','option2': '2. ','option3': '3. ','option4': '4. '}" value="%{#session.ans1}"/>