Re: Struts Templates Example in VAJ 3.5.3/WTE - Problem

[Martin]

Cedric, very  briefly tried adding flush="true" to all <template:get ...> tags, resulted in the following error: org.apache.jasper.JasperException: Attribute flush invalid according to the specified TLD.   Jon, the browser used is IE5.5, there weren't any exceptions to the console. I've attached the source for the generated html, hopefully this will provide some clues, seems the template is  being rendered  at the bottom of the page minus the content.

<font size='5'><a name="top">Topics</a></font><p>
  <table width='145'>
    <tr><td><a href='http://localhost:8080/jsptemplates/jsp/introduction.jsp'>
        Introduction </a></td></tr>

    <tr><td><a href='http://localhost:8080/jsptemplates/jsp/using.jsp'>
        Using Templates </a></td></tr>

    <tr><td><a href='http://localhost:8080/jsptemplates/jsp/optional.jsp'>
        Optional Content </a></td></tr>
    <tr><td><a href='http://localhost:8080/jsptemplates/jsp/more.jsp'>
        ... and more ...</a></td></tr>
  </table></p>

<table>
   <tr>
      <td><img src='http://localhost:8080/jsptemplates/graphics/java.gif'/></td>
      <td><img src='http://localhost:8080/jsptemplates/graphics/templates.gif'/></td>
   </tr>
</table><hr>
<p class="Paragraph"><i>This example application is based on <a 
href="http://www.javaworld.com/javaworld/jw-09-2000/jw-0915-jspweb_p.html";>Using JSP 
templates to encapsulate Webpage layout and encourage modular design</a> by David 
Geary. Follow that link for the full article, which also covers using role-based and 
nested templates. The template classes described in the Java World article were the 
basis for those included with Struts 1.0.</i></p>
<h3 class="ChapTitle">Introduction</h3>
<p class="Paragraph">Window toolkits typically provide a layout mechanism that 
positions widgets in a container; for example, AWT and Swing have layout managers, 
whereas VisualWorks Smalltalk has wrappers.</p>
<p class="Paragraph">Because layout undergoes many changes over the course of 
development, it's important to encapsulate that functionality so layout can be 
modified with minimal impact to the rest of the application. In fact, layout managers 
are an example of one of the tenets of object-oriented design: encapsulate the concept 
that varies, which is also a fundamental theme for many design patterns.</p>
<p class="Paragraph">JSP does not provide direct support for encapsulating layout, so 
web pages with identical formats usually replicate layout code; for example, <b>A Web 
Page Layout</b> shows a web page containing sections for a header, footer, sidebar, 
and main content.</p>
<p class="Paragraph">The layout of the page shown in <b>A Web Page Layout</b> is 
implemented with HTML table tags, as listed in Including Content.</p>
<p><img src="http://localhost:8080/jsptemplates/graphics/templates-1.gif";></p>
<h4 class="CodeCaption">Including Content</h4>
<p class="Example-Code">
&lt;html>&lt;head>&lt;title>Templates&lt;/title>&lt;/head><br>
&lt;body 
background='http://localhost:8080/jsptemplates/graphics/blueAndWhiteBackground.gif'></p>
<p class="Example-Code">
&lt;table width='610'><br>
&lt;tr valign='top'>&lt;td>&lt;jsp:include page='sidebar.jsp'/>&lt;/td><br>
&lt;td>&lt;table><br>
&lt;tr>&lt;td>&lt;jsp:include page='header.html'/>&lt;/td>&lt;/tr><br>
&lt;tr>&lt;td>&lt;jsp:include page='chapter.jsp'/>&lt;/td>&lt;/tr><br>
&lt;tr>&lt;td>&lt;jsp:include page='footer.jsp'/>&lt;/td>&lt;/tr><br>
&lt;/table><br>
&lt;/td><br>
&lt;/tr>&nbsp;<br>
&lt;/table><br>
&lt;/body>&lt;/html></p>
<p class="Paragraph">In Including Content, content is included with &lt;jsp:include> 
which allows content to vary without modifying HTML; however, because the layout is 
hardcoded, layout changes require modifications to the page. If a website has many 
pages with identical formats, even simple layout changes require modifications to all 
of the pages.</p>
<h4 class="ChapTitle">Using A Template</h4>
<br>
<p class="Example-Code">
&lt;%@ taglib URI='/WEB-INF/struts-template.tld' prefix='template' %></p>
<p class="Example-Code">
&lt;template:insert template='/chapterTemplate.jsp'><br>
   &lt;template:put name='title' content='Templates' direct='true'/><br>
   &lt;template:put name='header' content='/header.html'/><br>
   &lt;template:put name='sidebar' content='/sidebar.jsp'/><br>
   &lt;template:put name='content' content='/introduction.html'/><br>
   &lt;template:put name='footer' content='/footer.html'/><br>
&lt;/template:insert></p>

<p class="Paragraph">To minimize the impact of layout changes, a mechanism is needed 
for dynamically including layout in addition to content. That way, both layout and 
content can be changed without modifying files that use them. For large websites that 
have many pages with identical formats, such a mechanism is valuable because it 
localizes changes to layout. That mechanism is JSP templates.</p>
<hr><p align="right"><a href='#top'><font size="1">TOP</font></a></p>


<html>
<head>
<title>Templates</title>
<link rel="stylesheet" href="http://localhost:8080/jsptemplates/css/templates.css";
      charset="ISO-8859-1" type="text/css">
</head>
<body 
background='http://localhost:8080/jsptemplates/graphics/blueAndWhiteBackground.gif'>

<table>
   <tr valign='top'>
      <td></td>
      <td><table>
            <tr><td></td></tr>
            <tr><td></td></tr>
            <tr><td></td></tr>
          </table>
      </td>
   </tr> 
</table>
</body>
</html>