How to check list.contains in jsp using struts 2 tags

Question

I need to show a series of check boxes and if a condition is succeeded, I need to check them. Below is my code. I have regions which is a hashmap and SelectedRegions which is

Answer 1

There are really many ways to do this. You should also check out the <s:checkbox/> and <s:checkboxlist/> tags;

Also note that to follow DRY, you could put the <s:if> around the checked="checked" part only, since all the rest is the same.

Keeping it simple, with your code as-is, one way consists in using OGNL's in (contains) and OGNL's {} (list projection) like follows:

<s:iterator value="regions">
    <li>
        <div class="listClass">

            <input type = "checkbox" 
                     id = "myTheater" 
<s:if test="%{value in selectedRegions.{value}}">
                checked = "checked"
</s:if>
                   name = "theaterCheckBox" 
                  class = "theaterCheckBox" />

            <s:property value="value" />
        </div>
        <div class="checkboxDiv">
            <input type="checkbox" id="allFeatured" class="featuredCheckBox" />
        </div>
    </li>
</s:iterator>