JSTL Core <c:if> not working

Question

I'm passing a parameter page to my JSP page, now I have made an if statement on there, but it doesn't work.

<c:if var="${param.page == "course"}">class="active"</c:if>

Does somebody know what my problem is here?

Answer 1

The correct way to use it would be:

<c:if test="${param eq 'greetTheWorld'}">
  <p>Hello world!</p>
</c:if>

Consider it just like an if clause on programming.

if (1 < 0) {
  print("something is wrong!");
}

Answer 2

使用eq检查是否相等。

<c:if var="${param.page eq 'course'}">class="active"</c:if>