Condition checking inside a Display tag - conditional-statements

Question

I am displaying a student list(Name ,Mark, Result) using display tag in my struts 2 application.
if student scored more than 80 i need to display the entire row in green color else i need to display it
in red color .Below is my scenario , i am not familiar with display tag, please help me to solve this issue.
<display:table name="studentList" id = "student" cellspacing="1px" class="center">
<display:caption class="caption"><b>Student Mark List</b></display:caption>
if(mark>=80)
{
<display:column title="Student Name" property="name" class="green"> </display:column>
<display:column title="Student Mark" property="mark" class="green"></display:column>
<display:column title="Student Result" property="result" class="green"> </display:column>
}
else
{
<display:column title="Student Name" property="name" class="red"> </display:column>
<display:column title="Student Mark" property="mark" class="red"></display:column>
<display:column title="Student Result" property="result" class="red"> </display:column>
}
Thanks in advance.

Answer 1

I added this taglib at the beginning of my jsp
<%# taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
and i added below code
<display:table name="studentList" id = "student" cellspacing="1px" class="center">
<display:caption class="caption"><b>Student Mark List</b></display:caption>
<c:choose>
<c:when test="${mark>='80'}">
<c:set var="css" value="tableColumnGreen"/>
</c:when>
<c:otherwise>
<c:set var="css" value="tableColumnRed"/>
</c:otherwise>
</c:choose>
<display:column title="Student Name" property="name" class="${css}"> </display:column>
<display:column title="Student Mark" property="mark" class="${css}"></display:column>
<display:column title="Student Result" property="result" class="${css}"> </display:column>
This helped me.Thanks for everyone.