JSTL

JSTL

JSTL (JSP Standard Tag Library) is a collection of JSP tags included in the J2EE spec. It actually consists of five sets of tags

core - control flow statements and input/output
xml - XML processing
fmt - internationalization
sql - Database access.
functions - Expression Language functions

Header

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

Assignment

<c:set var="myvar" value="value"/>

Reading variables

<c:out value="${myvar}"/>

Request atttibutes, request.getAttribute(“name”) are not needed, the are accessed by the ${name} syntax.

Loops

<c:forEach items="${somelist}" var="element">
  do something with ${element}
</c:forEach>

If else becomes choose when

<c:choose>
  <c:when test="sometest">
    do something when test is true
  </c:when>
  <c:otherwise>
    do something when test is false
  </c:otherwise>
<c:choose>

 <jsp:useBean id="now" class="java.util.Date" />

“${not empty address.lastName}”