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最新推荐文章于 2025-07-31 09:57:57 发布

最新推荐文章于 2025-07-31 09:57:57 发布 · 110 阅读

文章标签：

#Java #JSP #Servlet #HTML #SUN

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TestAttributeTag .java

package tag2;

import java.io.IOException;
import java.text.DateFormat;
import java.util.Date;

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

public class TestAttributeTag extends TagSupport {
	
	private Date attr;
	
	public void setAttr(Date attr) {
		this.attr = attr;
	}

	@Override
	public int doStartTag() throws JspException {
		// TODO Auto-generated method stub
		JspWriter out = this.pageContext.getOut();
		try {
			out.write("从属性atrr中得到当前日期为："+DateFormat.getDateInstance().format(attr));
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return super.doStartTag();
	}
	
}

taglib.tld

<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 web-jsptaglibrary_2_0.xsd"  
    version="2.0">
    
	<tlib-version>1.0</tlib-version>
	<short-name>it315</short-name>
	<uri>/taglib</uri>
	
	<tag>
		<name>ShowViewIP</name>
		<tag-class>tag2.ViewIPTag</tag-class>
		<body-content>empty</body-content>
		<attribute>
		<name>name</name>
		<required>true</required>
		</attribute>
		
		
	</tag>
	<tag>
	<name>ShowDate</name>
		<tag-class>tag2.TestAttributeTag</tag-class>
		<body-content>empty</body-content>
		<attribute>
		<description>description</description>
		<name>attr</name>
		<required>true</required>
		<rtexprvalue>true</rtexprvalue>
		</attribute>
	</tag>
    </taglib>

index.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1" import="java.util.*" %>
    <%@ taglib uri="/taglib" prefix="it315" %>
<!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>
aa,<it315:ShowViewIP name="goby"/>
<% Date date = new Date(); %>
<it315:ShowDate attr="<%=date %>"/>
</body>
</html>