自定义JSP标签示例-优快云博客

本文链接：https://blog.youkuaiyun.com/wicycc/article/details/41800043

本文介绍了一个简单的自定义JSP标签实现方法，并通过一个Hello World标签的示例来展示如何创建和使用自定义JSP标签。该标签在JSP页面中输出预定义的文本。

HelloWorldTag.java

package com.ruanku.tag;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;

public class HelloWorldTag extends TagSupport{

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	@Override
	public int doStartTag() throws JspException {
		JspWriter out=this.pageContext.getOut();
		try {
			out.println("这是 jsp标签");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return TagSupport.SKIP_BODY;//直接结束标签
	}
	
}

cc.tld

<?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">
    <tlib-version>1.0</tlib-version>
    <short-name>ccTag</short-name>
    <tag>
    <name>helloWorld</name>
    <tag-class>com.ruanku.tag.HelloWorldTag</tag-class>
    <body-content>empty</body-content>
    </tag>
  
</taglib>

HelloWorldTag.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ taglib prefix="cc" uri="/WEB-INF/cc.tld" %>
<!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>
<cc:helloWorld/>
</body>
</html>

自定义标签<1>