Proper Tag Library declaration using XML for JSFs

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This topic has 1 reply, 2 voices, and was last updated 19 years, 1 month ago by Loyal Water.

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July 8, 2007 at 12:30 pm #272447 Reply

Russ

Member

I wanted to bring to your attention a style difference involving how tag libraries are declared in JSF enabled files. It is common practice to declare tag libraries in this way using the following format for JSPs:


<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>My JSF 'test.jsp' starting page</title>
    
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
    <link rel="stylesheet" type="text/css" href="styles.css">
    -->

</head>
  
<body>
    <f:view>
        This is my JSF JSP page. <br>
    </f:view>
</body>
</html>

However, a JSF coding standard advocated by many industry leaders is JSF.


<?xml version="1.0" ?>
<jsp:root version="2.0"
          xmlns:jsp="http://java.sun.com/JSP/Page"
          xmlns:f="http://java.sun.com/jsf/core"
          xmlns:h="http://java.sun.com/jsf/html">

<jsp:directive.page contentType="text/html"/>
<jsp:output omit-xml-declaration="no"
            doctype-root-element="html"
            doctype-public="-//W3C//DTD XHTML 1.0 Transitional//EN"
            doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"/>
          
<f:view>
    <html xmlns="http://www/w3/org/1999/xhtml">
          <head>
            <title>A Simple JavaServer Faces Application</title>
          </head>
  
          <body>
            <h:form>
                 ..............
            </h:form>
          </body>
    </html>
</f:view>
</jsp:root>

The rationale behind such a difference is the style follows more of an XML standard while eliminating the <% ..%> tags. It also identifies the proper DOCTYPE declaration for the generated HTML document.

The overall benefit of using this style is XML Editors will provide you more feedback in your design effort.

I hope this helps.

Russ

July 9, 2007 at 10:12 am #272467

Loyal Water

Member

Hi Russ,
Thanks for this post. I’ll take this to the development team.

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