礼悟:
好好学习合思考,尊师重道存感恩。叶见寻根三返一,江河湖海同一体。
虚怀若谷良心主,愿行无悔给最苦。读书锻炼强身心,诚劝且行且珍惜。
javaEE:7
javaSE:1.8
JSTL:1.2.2
server:tomcat 8.5
browser:Chrome/Firefox
os:windows7 x64
ide:MyEclipse 2017
项目结构
jizuiku-tags.tld
<?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"> ???<tlib-version>1.0</tlib-version> ?<short-name>jzk</short-name> ?<uri>http://www.jizuiku.com/tags/1.0</uri> ???????<!-- 配置标签 --> ?<tag> ?<name>sayHelloWoldFromMySimpleTagSupport</name><!-- 指定当前标签的名称 --> ?<tag-class>com.jizuiku.tag.MySimpleTagSupport</tag-class><!-- 当前标签的处理类 --> ?<body-content>empty</body-content><!-- 指定标签体的类型 empty空标签 --> ?</tag> ?</taglib>
MySimpleTagSupport.java
package com.jizuiku.tag;import java.io.IOException;import javax.servlet.jsp.JspException;import javax.servlet.jsp.tagext.SimpleTagSupport;/** * SimpleTagSupport 实现了 SimpleTag接口 * 将tomcat传来的礼物都保存了起来 * ?* @author 博客园-给最苦 ?* @version V2017.12.04 */public class MySimpleTagSupport extends SimpleTagSupport {@Overridepublic void doTag() throws JspException, IOException {// 看看 getJspContext 方法返回的是什么? this.getJspContext().getOut().print("HelloWoldFromMySimpleTagSupport");}}
MyJsp.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib prefix="j" uri="/WEB-INF/tlds/jizuiku-tags.tld"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> ?<head> ???<base href="<%=basePath%>"> ???????<title>My JSP ‘MyJsp.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><j:sayHelloWoldFromMySimpleTagSupport/> ?</body></html>
浏览器查看
学习资源:itcast和itheima视频库。如果您有公开的资源,可以分享给我的话,用您的资源学习也可以。
博文是观看视频后,融入思考写成的。博文好,是老师讲得好。博文坏,是 给最苦 没认真。
JSTL基础 SimpleTagSupport 自定义标签 标签体empty
原文地址:http://www.cnblogs.com/jizuiku/p/7993986.html