How to use VelocityLayoutViewResolver

[zhijiang]

I have defined velocityConfig & viewResolver in applicationContext.xml file:

<bean id="velocityConfig" class="org.springframework.web.servlet.view.velocity.VelocityConfigurer">
        <property name="resourceLoaderPath" value="/WEB-INF/velocity/"/>
        <!--<property name="configLocation" value="/WEB-INF/conf/velocity/velocity.properties"/>-->
    </bean>

    <!--
      View resolvers can also be configured with ResourceBundles or XML files. If you need
      different view resolving based on Locale, you have to use the resource bundle resolver.
    -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.velocity.VelocityLayoutViewResolver">
        <property name="cache" value="true"/>
        <property name="prefix" value="/WEB-INF/velocity/template/"/>
        <property name="suffix" value=".vm"/>
        <property name="contentType" value="text/html;charset=UTF-8"/>
        <property name="layoutUrl" value="/WEB-INF/velocity/layout/layout.vm"/>

        <!-- if you want to use the Spring Velocity macros, set this property to true -->
        <property name="exposeSpringMacroHelpers" value="true"/>
        <property name="exposeRequestAttributes" value="true"/>
        <property name="exposeSessionAttributes" value="true"/>
       
        <!--if you want to export request to vm.-->
        <!--<property name="exposeRequestAttributes" value="true"/>-->

        <!--If you want to export session to vm.-->
        <!--<property name="exposeSessionAttributes" value="true"/>-->

        <property name="viewClass" value="org.springframework.web.servlet.view.velocity.VelocityLayoutView"/>
    </bean>

My question is :
- How I can define layout.vm file? I can't find sample anywhere on the net.
- If I return ModelAndView as "index", how I can handle this? Does all presentation will go through layout.vm? If so, how about if I want to have different layout for different functions?
- Anyone have detailed material or example .

I have searched online for almost 4 hours, but just got a little, please help.

Thanks very much.
Chen

[zhijiang]

Anyone, please help...