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How can JSP 2.0 Tag Files be used for efficient HTML template inheritance?
- Mary-Kate OlsenOriginal
- 2024-12-02 02:45:09413browse
JSP Template Inheritance for HTML Templating
JSP 2.0 Tag Files offer a simple and versatile approach to template inheritance. Here's how to achieve it:
Base Template (base.tag)
<%@tag description="Simple Wrapper Tag" pageEncoding="UTF-8"%> <html><body> <jsp:doBody/> </body></html>
Example Page (example.jsp)
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="t" tagdir="/WEB-INF/tags" %>
<t:wrapper>
<h1>Welcome</h1>
</t:wrapper>
This will output:
<html><body> <h1>Welcome</h1> </body></html>
Extending the Template
To add header and footer sections to a page:
Generic Page Template (genericpage.tag)
<%@tag description="Overall Page template" pageEncoding="UTF-8"%>
<%@attribute name="header" fragment="true" %>
<%@attribute name="footer" fragment="true" %>
<html>
<body>
<div>
Example Page (userpage.jsp)
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="t" tagdir="/WEB-INF/tags" %>
<t:genericpage>
<jsp:attribute name="header">
<h1>Welcome ${userName}</h1>
</jsp:attribute>
<jsp:attribute name="footer">
<p>Reusable User Detail Fragment (userdetail.tag)
<%@tag description="User Page template" pageEncoding="UTF-8"%>
<%@tag import="com.example.User" %>
<%@attribute name="user" required="true" type="com.example.User"%>
First Name: ${user.firstName} <br/>
Last Name: ${user.lastName} <br/>
Phone: ${user.phone}<br/>
Example Page (using userdetail.tag)
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="t" tagdir="/WEB-INF/tags" %>
<t:userpage userName="${user.fullName}">
<p>
<t:userdetail user="${user}"/>
</p>
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