JSTL fn: startsWith () function
fn: startsWith () function is used to determine whether a string starts with the specified prefix.
grammar
fn: () syntax startsWith function is as follows:
<c:if test="${fn:startsWith(<原始字符串>, <搜索的前缀>)}">
...
</c:if>
Examples Demo
The following examples demonstrate the capabilities of this function:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<html>
<head>
<title>使用 JSTL 函数</title>
</head>
<body>
<c:set var="string" value="w3big: I am from w3big."/>
<c:if test="${fn:startsWith(string, 'Google')}">
<p>字符串以 Google 开头</p>
</c:if>
<br />
<c:if test="${fn:startsWith(string, 'w3big')}">
<p>字符串以 w3big 开头</p>
</c:if>
</body>
</html>
Results are as follows:
字符串以 w3big 开头