1.首先我們先來創建一個類，用標籤來實現類裏面的方法，該方法必須爲靜態方法
public class Text {
public static String mytag(){
String str="這是一個自定義標籤。。。";
return str;
}
}
<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
version="2.0">
<description>JSTL 1.1 functions library</description>
<display-name>JSTL functions</display-name>
<tlib-version>1.1</tlib-version>代表標籤庫的版本號
<short-name>mytag</short-name>自定義標籤名
<uri>http://www.mytag.com</uri>自定義連接
<function>
<description>
mytag 標籤描述
</description>
<name>mytag</name> 標籤名
<function-class>zhidingyi.Text</function-class> 類的路徑
<function-signature>java.lang.String mytag() </function-signature> 返回值類型和方法名
</function>
</taglib>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib prefix="mytag" uri="http://www.mytag.com" %>引入標籤庫
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
${mytag:mytag() } 用el表達式輸出
</body>
</html>
前臺頁面顯示
