The JSTL Core Tag is used when a number of alternatives are available for a particular condition. It works same as of switch statement in java. The is like switch, is like case and is like default statement.
Syntax:
<c:choose>
<c:when test="${testCondition1}">
//block of statements
</c:when>
<c:when test="${testCondition2}">
//block of statements
</c:when>
//Other
<c:otherwise>
//block of statements
</c:otherwise>
</c:choose>
|
c:when tag attributes:
| Attribute | Description | Required |
| test | It specify the condition to evaluate. | No |
Note: c:choose and c:otherwise tags does not have any attribute.
Example:
test.jsp
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<html>
<head>
<title>
c:choose, c:when and c:otherwise JSTL core tag example
</title>
</head>
<body>
<c:set var="num" value="100"/>
<c:choose>
<c:when test="${num > 10}">
Number is greater than 10.
</c:when>
<c:otherwise>
Number is less than or equal to 10.
</c:otherwise>
</c:choose>
</body>
</html>
|
web.xml
<web-app>
<welcome-file-list>
<welcome-file>test.jsp</welcome-file>
</welcome-file-list>
</web-app>
|
Output:
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