如何仅显示选定的项目列表？

Question

I am trying to populate a list something like below:

<select name="prescription"  multiple="multiple">
    <c:forEach items="${medicines}" var="current">
        <option value="${current}"><c:out value="${current}" /></option>
    </c:forEach>

</select>

I am trying to populate only the selected list in another similar for each loop. But i am not getting how to do it. Can any one help me with it?

Answer 1

Seems like you are showing some list from the controller to the jsp page , You can proceed with either of these 2 ways

1. Add the only items in the list that you want to show for example :

assuming that the list medicine has all the parameters

        List<String> medicine = Your-List;

        List<String> final_medicine = new ArrayList<String>();

    for(int i=0; i < medicine.size(); i++)
    {

              if(your-condition-here){

                  final_medicine.add(medicine.get(i));
             }
    }

request.setAttribute("medicine",final_medicine);

The second way could be getting the values in the jsp itself using the

<select name="prescription"  multiple="multiple">
    <c:forEach items="${medicines}" var="current">
            <c:if test="${medicines eq your-condition}>
               <option value="${current}"><c:out value="${current}" /></option>
            </c:if>
    </c:forEach>

</select>

If this is something that you require?