Posted on: July 3, 2010 at 12:00 AM
The fn:toUpperCase & fn:toLowerCase tags of JSTL
In this section ,we will learn how to use fn:toUpperCase
and fn:toLowerCase Tag of JSTL. These tags are used to change
case of specified string to upper or lower. This takes string type as argument.
EXAMPLE:
In this Example, the user enters the value of string, which he wants to change it's case(i.e lowercase or uppercase). The c:if tag of JSTL checks whether requirement is 'uppercase' or' lowercase' & convert it accordingly using "fn:toUpperCase()" or " fn:toLowerCase()" method of JSTL.
changeCaseJSTL.jsp
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<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> < html> <head> <title>Example of 'fn:toUpperCase' and 'fn:toLowerCase' tag of jstl</title> </head> <body bgcolor="grey"> <form method="POST">Enter String here and select case as per your choice. <table> <tr> <td>Enter String</td> <td><input type="text" name="string"></td> </tr> <tr> <td></td> <td><input type="radio" name="case" value="upper"> Upper Case <input type="radio" name="case" value="lower"> Lower Case </td> </tr> <tr> <td></td> <td><input type="submit" value="change"></td> </tr> </table> </form> <c:if test="${pageContext.request.method=='POST'}"> <c:set var="string" value="${param.string}"/> <font size="5" color="green"> <c:if test="${param.case=='upper'}"> <c:out value="${fn:toUpperCase(string)}"/> </c:if> <c:if test="${param.case=='lower'}"> <c:out value="${fn:toLowerCase(string)}"/> </c:if> </font> </c:if> </body></ html> |
OUTPUT :
After submitting Value the output will be :
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