fn:substring()
fn:substring()函数返回由start和end索引指定的字符串的子集。
语法 (Syntax)
fn:substring ()函数具有以下语法 -
java.lang.String substring(java.lang.String, int, int)
例子 (Example)
下面的例子解释了fn:substring()函数的功能 -
<%@ 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>Using JSTL Functions</title>
</head>
<body>
<c:set var = "string1" value = "This is first String."/>
<c:set var = "string2" value = "${fn:substring(string1, 5, 15)}" />
<p>Final sub string : ${string2}</p>
</body>
</html>
您将收到以下结果 -
Final sub string : is first S