编写描述的tld文件放到web-inf/目录下，才能在jsp页面上调用
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
version="2.1">
<tlib-version>1.0</tlib-version>
<short-name>lf</short-name>
<uri>www.com.zr.lf.fun</uri> <!-- 指定访问的路径 -->
<function>
<name>strLen</name> <!-- 指定EL自定义函数的名称 -->
<function-class>com.zr.testelfun.function.TestFunction</function-class><!-- 指定完整的Java类名 -->
<!-- 指定Java类中的静态方法签名，必须指明方法的返回值类型及各个参数的类型，各个参数之间用逗号分隔 -->
<function-signature>
int getStrLength(java.lang.String)
</function-signature>
</function>
</taglib>
package com.zr.testelfun.function;
public class TestFunction {
public static int getStrLength(String str){
return str.length();
}
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="lf" uri="www.com.zr.lf.fun" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>test</title>
</head>
<body>
<h1>字符串长度：${lf:strLen("adcc") } </h1>
</body>
</html>
时间： 2024-10-07 06:47:31