package com.ceshi;
import java.io.IOException;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.*;
public class TestTag extends SimpleTagSupport {
private String outerTagName="p";
public String getOuterTagName() {
return outerTagName;
}
public void setOuterTagName(String outerTagName) {
this.outerTagName = outerTagName;
}
private int count;
public int getCount() {
return count;
}
public void setCount(int count) {
this.count = count;
}
@Override
public void doTag() throws JspException, IOException {
JspFragment jsp=this.getJspBody();
this.getJspContext().getOut().write("<"+outerTagName+">");
for(int i=0; i<count;i++){
jsp.invoke(null);
}
this.getJspContext().getOut().write("</"+outerTagName+">");
}
}
<?xml version="1.0" encoding="UTF-8"?>
<taglib xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_1.xsd"
version="2.1">
<description>JSTL 1.1 core library</description>
<display-name>JSTL core</display-name>
<tlib-version>1.1</tlib-version>
<short-name>m</short-name>
<uri>http://www.baidu.com/myjstl</uri>
<tag>
<description>
</description>
<name>show</name>
<tag-class>com.ceshi.TestTag</tag-class>
<body-content>scriptless</body-content>
<attribute>
<description>
Name of the exported scoped variable for the
exception thrown from a nested action. The type of the
scoped variable is the type of the exception thrown.
</description>
<name>outerTagName</name>
<required>false</required>
<rtexprvalue>false</rtexprvalue>
</attribute>
<attribute>
<description>
Name of the exported scoped variable for the
exception thrown from a nested action. The type of the
scoped variable is the type of the exception thrown.
</description>
<name>count</name>
<required>true</required>
<rtexprvalue>false</rtexprvalue>
</attribute>
</tag>
<tag>
</tag>
</taglib>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@taglib prefix="m" uri="http://www.baidu.com/myjstl" %>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<m:show outerTagName="h4" count="2">
hahahha<br>
</m:show>
</body>
</html>
实现效果如下：
时间： 2024-10-12 18:12:28