java_自定义标签,我的第一个自定义标签!
自定义标签,我的第一个自定义标签! 总共分两步
一.案例,???????? 输出客户端IP ViewIP.jsp <%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding</span>="UTF-8"%>
<%@ taglib uri="/WEB-INF/firstTag.tld" prefix="itcast"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<p align="left">? 在WEB-INF目录下建立一个tld文件,: firstTag.tld <taglib xmlns="http://java.sun.com/xml/ns/j2ee"<span style="color: #000000">
<p align="left">? <p align="left"> 编写标签处理器类: <p align="left"> viewIPTag.java <div class="cnblogs_code"> <img id="code_img_closed_afb88ded-3699-47de-beb7-941f9aabb766" class="code_img_closed" src="https://www.52php.cn/res/2019/02-08/14/1c53668bcee393edac0d7b3b3daff1ae.gif" alt=""><img id="code_img_opened_afb88ded-3699-47de-beb7-941f9aabb766" class="code_img_opened" style="display: none" src="https://www.52php.cn/res/2019/02-08/14/405b18b4b6584ae338e0f6ecaf736533.gif" alt=""><div id="cnblogs_code_open_afb88ded-3699-47de-beb7-941f9aabb766" class="cnblogs_code_hide"> <span style="color: #0000ff">import<span style="color: #000000"> java.io.IOException;
<span style="color: #0000ff">import<span style="color: #000000"> javax.servlet.http.HttpServletRequest;
<span style="color: #0000ff">import<span style="color: #000000"> javax.servlet.jsp.JspException; <span style="color: #0000ff">import<span style="color: #000000"> javax.servlet.jsp.JspWriter; <span style="color: #0000ff">import<span style="color: #000000"> javax.servlet.jsp.tagext.TagSupport; <span style="color: #0000ff">public <span style="color: #0000ff">class viewIPTag <span style="color: #0000ff">extends<span style="color: #000000"> TagSupport{
<span style="color: #000000">
} <p align="left"> 效果截图: <p align="left"> <img src="https://www.52php.cn/res/2019/02-08/14/cafe3234458a87af23bc3df86122af0d.png" alt=""> (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |