fn:length()
fn:length()函数返回字符串长度或集合中的项目数。
语法 (Syntax)
fn:length()函数具有以下语法 -
int length(java.lang.Object)
例子 (Example)
下面的例子解释了fn:length()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 = "This is second String." />
<p>Length of String (1) : ${fn:length(string1)}</p>
<p>Length of String (2) : ${fn:length(string2)}</p>
</body>
</html>
您将收到以下结果 -
Length of String (1) : 21
Length of String (2) : 22
