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I am converting an existing Tiles 1 webapp to Tiles 2 architecture. I am having trouble passing values from JSP page to tiles attributes.
Here is my tiles definition file (tiles-definition.xml)
<tiles-definitions>
<definition name="cda.layout" template="/jsp/layouts/layout.jsp">
<put-attribute name="pageTitle" value="StoryTitle" type="string"/>
<put-attribute name="pageHeader" value="StoryHeader" type="string"/>
<put-attribute name="resources" value="" type="string"/>
</definition>
</tiles-definitions>
The layout.jsp looks like:
<html>
<head>
<title><tiles:insertAttribute name="pageTitle" flush="true"/></title>
</head>
<body>
...
...
<div class="content">
<h1><tiles:insertAttribute name="pageHeader" flush="true"/></h1>
</div>
...
...
</body>
</html>
I have a story page which uses the layout and need to pass values to template attributes.
<%
// create a business object and populate
String mytitle= story.getTitle();
String myheader = story.getHeader();
%>
<tiles:insertTemplate template="../layouts/layout.jsp" flush="false" >
<tiles:putAttribute name="pageTitle" value="${mytitle}"/>
<tiles:putAttribute name="pageHeader"value="${myheader}"/>
</tiles:insertTemplate>
In the story.jsp, I can System.out.print() the values for mytitle, myheader and they are showing correct. But, these values are NOT passed on to the tile attributes.
Any idea how to fix this?
972
${mytitle} is a JSP EL expression which means: find an attribute in page scope, or request scope, or session scope, or application scope, named "mytitle".
By defining a scriptlet variable, you haven't defined an attribute in any of these scopes. It would work if you had
pageContext.setAttribute("mytitle", mytitle);
But using scriptlets in JSPs is bad practice. I don't know where your story bean comes from, but it's probably a request attribute. If so, you can define a new page-scope attribute this way, using the JSTL:
<c:set var="mytitle" value="${story.title}"/>
This is unnecessary though, since you could use this expression directly in the tiles tag:
<tiles:putAttribute name="pageTitle" value="${story.title}"/>
Read more about the JSP EL in this tutorial.
53
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