On 2/20/07, janbrito <[EMAIL PROTECTED]> wrote:
Hi, I'm trying to get Velocity working on a struts application. This is what
I've dono so far:
Have you looked at the "struts" example application that comes with
VelocityTools? That might help you find problems in your setup.
1) Added to the project the velocity libraries (velocity-1.4.jar,
velocity-dep-1.4.jar and velocity-tools-1.3.jar)
I strongly recommend upgrading to velocity-dep-1.5-beta2. It is quite
stable and contains numerous bug fixes and improvements. Velocity
1.5 final should be released in just a week or so, and there have been
few changes since 1.5-beta2.
2) Added this to my web.xml file:
<servlet>
<servlet-name>velocity</servlet-name>
<servlet-class>
org.apache.velocity.tools.view.servlet.VelocityViewServlet
</servlet-class>
<init-param>
<param-name>org.apache.velocity.toolbox</param-name>
<param-value>/WEB-INF/toolbox.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>velocity</servlet-name>
<url-pattern>*.vm</url-pattern>
</servlet-mapping>
looks good
3) Created the toolbox.xml file in WEB-INF dir with this content:
<?xml version="1.0"?>
<toolbox>
<tool>
<key>link</key>
<scope>request</scope>
<class>
org.apache.velocity.tools.struts.StrutsLinkTool
</class>
</tool>
<tool>
<key>msg</key>
<scope>request</scope>
<class>
org.apache.velocity.tools.struts.MessageTool
</class>
</tool>
<tool>
<key>errors</key>
<scope>request</scope>
<class>
org.apache.velocity.tools.struts.ErrorsTool
</class>
</tool>
<tool>
<key>form</key>
<scope>request</scope>
<class>
org.apache.velocity.tools.struts.FormTool
</class>
</tool>
<tool>
<key>tiles</key>
<scope>request</scope>
<class>
org.apache.velocity.tools.struts.TilesTool
</class>
</tool>
<tool>
<key>validator</key>
<scope>request</scope>
<class>
org.apache.velocity.tools.struts.ValidatorTool
</class>
</tool>
</toolbox>
looks good.
4) Created an example index.vm file with only this code:
<html>
<head>
<title>$msg.get("label.portal.welcome")</title>
</head>
<body bgcolor="white">
</body>
</html>
looks fine, but you can simplify it a bit by changing
$msg.get("label.portal.welcome") -> $msg.label.portal.welcome
label.portal.welcome is defined on my ApplicationResource.properties struts
file.
When I access the index file I get the following error:
VelocityViewServlet : Error processing a template for path '/jsp/index.vm'
java.lang.NullPointerException
at org.apache.velocity.io.VelocityWriter.write(VelocityWriter.java:319)
at
i don't remember the exact trigger for this, but this is a bug which
has been fixed in Velocity 1.5-beta2.
<snip/>
So I pretty sure I've missed a step or two when setting Velocity up :)
i'm not sure. do you have logging setup?
Also, I would like to know how do I replace velocity tags with database
values I retrieve on my action classes.
in your action, put those database values into the HttpServletRequest
attributes:
request.setAttribute("myDBValue", myDBValue);
then, in your template, just do:
$myDBValue
Thanks
--
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