JSP Tag Files: A Powerful Tool for Templating
When converting HTML files into JSP projects, JSP templating proves beneficial but may lack advanced features like template inheritance and base file support. While dynamic routing might seem like a solution, JSP 2.0 Tag Files offer a simpler and more customizable approach.
Basic JSP 2.0 Tag Files (wrapper.tag)
<dobody></dobody>
Usage:
<wrapper>
<h1 id="Welcome">Welcome</h1>
</wrapper>
Advanced Tag Files: Generic Layouts and Reusable Fragments (genericpage.tag, header.jsp, footer.jsp)
<div>
<p>Usage:</p>
<pre class="brush:php;toolbar:false">
<genericpage>
<attribute name="header">
<include page="header.jsp"></include>
</attribute>
<attribute name="footer">
<include page="footer.jsp"></include>
</attribute>
<body>
<h2 id="My-Awesome-Content">My Awesome Content</h2>
</body>
</genericpage>
Inheritance and Reusability with Parameterized Tag Files (userpage.tag)
<genericpage>
<attribute name="header">
<h1 id="Welcome-userName">Welcome ${userName}</h1>
</attribute>
<attribute name="footer">
<p></p></attribute></genericpage>
Usage:
<userpage username="${user.fullName}">
<p>
First Name: ${user.firstName} <br>
Last Name: ${user.lastName} <br>
Phone: ${user.phone}<br>
</p>
</userpage>
Extendable Component with Reusable Logic (userdetail.tag)
First Name: ${user.firstName} <br>
Last Name: ${user.lastName} <br>
Phone: ${user.phone}<br>
Usage:
<userpage username="${user.fullName}">
<p>
<userdetail user="${user}"></userdetail>
</p>
</userpage>
Conclusion
JSP Tag Files offer a powerful and versatile templating mechanism. They provide advanced inheritance and reusability capabilities, simplify complex layouts, and enable the creation of custom tags tailored to specific applications. By leveraging the flexibility of JSP Tag Files, developers can effectively build maintainable and expressive web applications with ease.
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