Use of Tag of JSTL

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Use of Tag of JSTL

In this section, you will lran how to use Tag of JSTL.

In this section, you will lran how to use Tag of JSTL.

Use of <fn:replace(String, String, String)> Tag of JSTL

     

In this section we will learn how to use <fn:replace> Tag of JSTL. This tag returns a string after replacing the given sub string with specified sub string. This takes string type as arguments and returns string type.

 

Syntax :
java.lang.String replace(java.lang.String, java.lang.String, java.lang.String)

replace_fnJstlTag.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<html>
    <head>
        <title>Example of fn:replace tag of Jstl tag library</title>
    </head>
    <body>
        <form method="POST">
            <table>
                <tr>
                    <td>Enter String in you want to replace</td>
                    <td><input type="text" name="string"></td>
                </tr>
                
                                <tr>
                    <td>Replace character/string</td>
                    <td><input type="text" name="find"></td>
                </tr>
                <tr>
                    <td>Replace with</td>
                    <td><input type="text" name="replaceWith" size="3"></td>
                </tr>
                
                                <tr>
                    <td></td>
                    <td><input type="submit" value="Replace all"></td>
                </tr>
            </table>  
        </form>
        <c:if test="${pageContext.request.method=='POST'}">
            <c:set var="string" value="${param.string}"/>
            <c:set var="find" value="${param.find}"/>
            <c:set var="replaceWith" value="${param.replaceWith}"/>
            <font size="5" color="#1B2A0A">
                Result : 
            </font>
            <font size="5" color="green">

   <c:out value="${fn:replace(string,find,replaceWith)}"/>

            </font>
        </c:if>
    </body>
</html>


This jsp code shows the following output :

Suppose in user wants to replace all 'x' with character 'a' in string "Mahendra Singh"....

When user clicks on Replace all button, output will be.....

Download Source Code

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