In this section, you will learn how to use
Use of <fn:subString(String, int, int)> Tag of JSTL
In this section we will learn how to use <fn:subString
>
Tag of JSTL. This tag returns a subset of a string of specified length. This takes string
and integer type as arguments and return string type.
Syntax : |
java.lang.String substring(java.lang.String,
int, int) |
subString_fnJstlTag.jsp
<%@ 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:subString' tag of jstl</title> </head> <body> <form method="POST"> Enter String here and mention upper and lower limit to cut substring<br> from this given string. <table> <tr> <td>Enter String</td> <td><input type="text" name="string"></td> </tr> <tr> <td>Start from</td> <td><input type="text" name="start" size="3"></td> </tr> <tr> <td>End to</td> <td><input type="text" name="end" size="3"></td> </tr> <tr> <td></td> <td><input type="submit" value="cut"></td> </tr> </table> </form> <c:if test="${pageContext.request.method=='POST'}"> <c:catch var="exception"> <c:set var="string" value="${param.string}"/> <c:set var="start" value="${param.start}"/> <c:set var="end" value="${param.end}"/> <font size="5" color="green"> <c:out value="${fn:substring(string,start,end)}"/> </font> </c:catch> <c:if test="${exception!=null}"> <font size="5" color="red">Error Found.</font> </c:if> </c:if> </body> </html> |
This jsp code shows the following output :
Here user will enter string and specify the start and
end point form where user wants to retrieve the sub string....
When user clicks on cut button, output will be.......
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