Tiles2.2.1, Struts2.1.8.1, Spring2.5.6 ===> "UnresolvingLocaleDefinitionsFactory.java:102" ???

[Emi Lu]

Good afternoon,

Tiles2.2.1, Struts 2.1.8.1, Spring 2.5.6, tried simple example, but 
always got the following error:
===================================
java.lang.NullPointerException
        
org.apache.tiles.definition.UnresolvingLocaleDefinitionsFactory.getDefinition(UnresolvingLocaleDefinitionsFactory.java:102)
org.apache.tiles.impl.BasicTilesContainer.getDefinition(BasicTilesContainer.java:364)
org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:618)
org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:321)
org.apache.struts2.views.tiles.TilesResult.doExecute(TilesResult.java:105)
... ...
Could someone tell me why I get this error?

Thanks a lot!
--
Lu Ying

(1) web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_9" version="2.4" 
xmlns="http://java.sun.com/xml/ns/j2ee"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd";>

   <display-name>Struts2 Testing</display-name>

   <!-- Uncomment/comment this if you need/don't need Spring support -->
   <context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>/WEB-INF/applicationContext*.xml</param-value>
   </context-param>


   <!-- tiles begin -->
   <context-param>
      <param-name> 
org.apache.tiles.impl.BasicTilesContainer.DEFINITIONS_CONFIG </param-name>
      <param-value>/WEB-INF/tiles.xml</param-value>
   </context-param>

   <!-- tiles end -->



   <filter>
      <filter-name>struts2</filter-name>

<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
      <init-param>
         <param-name>actionPackages</param-name>
         <param-value>user.actions</param-value>
      </init-param>
   </filter>


   <filter-mapping>
      <filter-name>struts2</filter-name>
      <url-pattern>/*</url-pattern>
   </filter-mapping>


   <listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 

   </listener>
   <listener>
      <listener-class>org.apache.struts2.tiles.StrutsTilesListener 
</listener-class>
   </listener>


   <welcome-file-list>
      <welcome-file>begin.jsp</welcome-file>
   </welcome-file-list>


</web-app>





(2) struts.xml
... ...
<struts>
 <constant name="struts.enable.DynamicMethodInvocation" value="false" />
 <constant name="struts.devMode" value="false" />

<package name="default" extends="struts-default">
<result-types>
<result-type name="tiles" 
class="org.apache.struts2.views.tiles.TilesResult" />
</result-types>

<action name="*Link" method="{1}" 
class="example.action.tiles.ProcessTile1">
  <result name="welcome" type="tiles">welcome</result>
  </action>
</package>

</struts>



(3) tiles.xml
<tiles-definitions>
   <definition name="baseLayout" template="/baseLayout.jsp">
   </definition>
   <definition name="welcome" extends="baseLayout">
   </definition>
</tiles-definitions>



(4) jsp file
<a href="<s:url action="welcomeLink"/>"> Tile example1   </a>

(5) baseLayout.jsp
hello world

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