JSTL fn: substring () function
fn: substring () function returns a string specified start and end of the substring index.
grammar
fn: () syntax substring function is as follows:
${fn:substring(<string>, <beginIndex>, <endIndex>)}
Examples Demo
The following examples demonstrate the capabilities of this function:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<html>
<head>
<title>使用 JSTL 函数</title>
</head>
<body>
<c:set var="string1" value="This is first String."/>
<c:set var="string2" value="${fn:substring(string1, 5, 15)}" />
<p>生成的子字符串为 : ${string2}</p>
</body>
</html>
Results are as follows:
生成的子字符串为 : is first S