Spring MVC Portlet Question in JDeveloper 11.1.1.4

Hello All,
I am trying to develop a spring mvc portlet and test it in Jdeveloper 11.1.1.4 (integrated weblogic server). Below is my portlet.xml ... I don't think portlet-class is getting loaded. Even if i put xxxxx in the classname i don't see any errors. Has anyone done this before, what to see if there is any suggestions.
I have a controller configured in helloWorld-portlet.xml and it is not getting invoked.
thanks in advance,
Prasad.
<portlet id="1341320919131">
<portlet-name>helloWorld</portlet-name>
<display-name xml:lang="en-US">HelloWorld</display-name>
<display-name xml:lang="en">English Display Name</display-name>
<portlet-class>org.springframework.web.portlet.DispatcherPortlet</portlet-class>
<init-param>
<name>contextConfigLocation</name>
<value>/WEB-INF/helloWorld-portlet.xml</value>
</init-param>
<expiration-cache>0</expiration-cache>
<supports>
<mime-type>text/html</mime-type>
<portlet-mode>view</portlet-mode>
</supports>
<supported-locale>en-US</supported-locale>
<resource-bundle>content.Language-ext</resource-bundle>
<portlet-info>
<title>HelloWorld</title>
<short-title>HelloWorld</short-title>
<keywords></keywords>
</portlet-info>
<portlet-preferences>
<preference>
<name>portletTitle</name>
<value>value1</value>
</preference>
</portlet-preferences>
</portlet>
<custom-portlet-mode>
<portlet-mode>about</portlet-mode>
</custom-portlet-mode>
<custom-portlet-mode>
<portlet-mode>config</portlet-mode>
</custom-portlet-mode>
<custom-portlet-mode>
<portlet-mode>edit_defaults</portlet-mode>
</custom-portlet-mode>
<custom-portlet-mode>
<portlet-mode>preview</portlet-mode>
</custom-portlet-mode>
<custom-portlet-mode>
<portlet-mode>print</portlet-mode>
</custom-portlet-mode>
</portlet-app>

Also, I want to find if portlet.xml will be invoked only if deployed into webcenter, right now i am trying to run the helloWorld.jsp from Jdeveloper at url - http://127.0.0.1:7101/helloWorld/helloWorld/html/helloWorld.jsp and i am getting an empty page

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