Skip to content

Conditionals

For a simple if statement, use the <c:if> tag.

<c:if test="${boolean expression}">
  <%-- content to include if the conditional is true --%>
</c:if>

For more complex conditionals, use the <c:choose> tag.

  • Use <c:when> tags for each condition and an optional <c:otherwise> tag for any conditions that do not match.
<c:choose>
  <c:when test="${boolean expression}">
    <%-- ... --%>
  </c:when>
  <c:when test="${boolean expression}">
    <%-- ... --%>
  </c:when>
  <c:otherwise>
    <%-- ... --%>
  </c:otherwise>
</c:choose>

Practice Exercise

There is no else tag. You must use <c:choose> if you want to do an if/else-if/else.


Drill

TagLibraries/src/main/webapp/WEB-INF/select.jsp

  • If the selected Stock's price is over $75, surround it with a <strong> tag.
  • If the selected Stock's price is under $35, surround it with an <em> tag.

Be sure to add the core library's taglib to the JSP page.

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

Test cases: ZTS, AAC

(Solution: /WEB-INF/solutions/select.jsp)

Prev -- Up -- Next