1.先写java代码
package com.cgm.tldtest;
import java.io.IOException;
import javax.servlet.jsp.JspContext;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.JspFragment;
import javax.servlet.jsp.tagext.JspTag;
import javax.servlet.jsp.tagext.SimpleTag;
//还有一个tag
public class MyTldDate implements SimpleTag {
public void doTag() throws JspException, IOException {
System.out.println("doTag()");
}
public JspTag getParent() {
System.out.println("getParent()");
// TODO Auto-generated method stub
return null;
}
public void setJspBody(JspFragment jspBody) {
System.out.println("setJspBody()");
// TODO Auto-generated method stub
}
public void setJspContext(JspContext pc) {
System.out.println("setJspContext()");
// TODO Auto-generated method stub
}
public void setParent(JspTag parent) {
System.out.println("setParent()");
// TODO Auto-generated method stub
}
}
2.编写tld文件 (在web-inf下面tld文件夹写)
<?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>
<!-- 这就是前缀 -->
<short-name>my</short-name>
<uri>http://www.cgmcc.com/jsp/mytag</uri>
<!-- 注册标签 my:date -->
<!--声明的标签-->
<tag>
<name>date</name>
<!-- 注册哪个类 -->
<tag-class>com.cgm.tldtest.MyTldDate</tag-class>
<!-- 表钱的bod体内容 -->
<body-content>empty</body-content>
</tag>
</taglib>
3.jsp 测试
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://www.cgmcc.com/jsp/mytag" prefix="my" %>
<%
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 'mytag.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>
<my:date/>
This is my JSP page. <br>
</body>
</html>
运行一下输出。。。。。执行
setJspContext()
doTag()
package com.cgm.tldtest;
import java.io.IOException;
import javax.servlet.jsp.JspContext;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.JspFragment;
import javax.servlet.jsp.tagext.JspTag;
import javax.servlet.jsp.tagext.SimpleTag;
//还有一个tag
public class MyTldDate implements SimpleTag {
public void doTag() throws JspException, IOException {
System.out.println("doTag()");
}
public JspTag getParent() {
System.out.println("getParent()");
// TODO Auto-generated method stub
return null;
}
public void setJspBody(JspFragment jspBody) {
System.out.println("setJspBody()");
// TODO Auto-generated method stub
}
public void setJspContext(JspContext pc) {
System.out.println("setJspContext()");
// TODO Auto-generated method stub
}
public void setParent(JspTag parent) {
System.out.println("setParent()");
// TODO Auto-generated method stub
}
}
2.编写tld文件 (在web-inf下面tld文件夹写)
<?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>
<!-- 这就是前缀 -->
<short-name>my</short-name>
<uri>http://www.cgmcc.com/jsp/mytag</uri>
<!-- 注册标签 my:date -->
<!--声明的标签-->
<tag>
<name>date</name>
<!-- 注册哪个类 -->
<tag-class>com.cgm.tldtest.MyTldDate</tag-class>
<!-- 表钱的bod体内容 -->
<body-content>empty</body-content>
</tag>
</taglib>
3.jsp 测试
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://www.cgmcc.com/jsp/mytag" prefix="my" %>
<%
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 'mytag.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>
<my:date/>
This is my JSP page. <br>
</body>
</html>
运行一下输出。。。。。执行
setJspContext()
doTag()