结构如下：
①创建page.tld文件：
<?xml version="1.0" encoding="utf-8" ?> <!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.2//EN" "http://java.sun.com/dtd/web-jsptaglibrary_1_2.dtd"> <taglib> <!--定义标签版本库 --> <tlib-version>1.0</tlib-version> <!--定义jsp版本库 --> <jsp-version>1.2</jsp-version> <short-name>Cms Tag</short-name> <uri>http://www.gdie.page</uri> <description><!--标签描述- --> A simple appbase tag library </description> <tag> <name>page</name><!--tag的名字 --> <tag-class>com.cms.common.tag.PageTag</tag-class><!--tag对应的java类的名字 --> <body-content>empty</body-content> <!--关于body-content 有三个值可选;empty：标签体必须为空;jsp：标签由其他jsp元素组成比如标签中含有<%=attributeName%>的jsp元素,那么此时body-content的值就是实际attributeName传入的值;tagdependent:有标签解释不带jsp转换（这个深入的含义不太了解） --> <attribute><!---这里表示的是这个tag的一个参数 --> <name>cmsform</name><!--这个参数的名字 --> <required>true</required><!--是否是必填选项 --> <rtexprvalue>true</rtexprvalue><!--这个参数的值是否可以写入，换句话说 就是这个参数是否可以动态赋值 --> </attribute> </tag> </taglib>
②PageTag.java
package com.cms.common.tag;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
public class PageTag extends TagSupport {
private static final long serialVersionUID = 1L;
private String cmsform = "";
public String getCmsform() {
return cmsform;
}
public void setCmsform(String cmsform) {
this.cmsform = cmsform;
}
public int doStartTag()
{
return super.SKIP_BODY;
}
public int doEndTag() throws JspException
{
JspWriter writer=pageContext.getOut();
try {
writer.print("这是我的标签示例<br/>"+"cmsform :"+this.cmsform);
} catch (Exception e) {
e.printStackTrace();
}
return super.EVAL_PAGE;
}
}
③web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>springmvc3</display-name>
<jsp-config>
<taglib>
<taglib-uri>http://www.gdie.page</taglib-uri>
<taglib-location>/tld/page.tld</taglib-location>
</taglib>
</jsp-config>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
</web-app>
④index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="jason" uri="http://www.gdie.page" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<jason:page cmsform="success..."/>
</body>
</html>
运行效果如下：
作者：zhongqian123 发表于2013-4-8 23:59:00 原文链接
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