ContentNegotiatingViewResolver with multiple mediaTypes

[rrr]

I want my restful server to support both json & xml data mapping - currently I am using the JacksonToJson Serializer for the json conversions - how would I define a xml serializer for the same data objects that are used in the json conversion?
my servelt.xml looks like this:

<mvc:annotation-driven />
	<bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
		<property name="mediaTypes">
		  	<map>
		          <entry key="json" value="application/json"/>
		       </map> 	
		</property>  
		<property name="viewResolvers">
			<list>
				<bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
				<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
				   <property name="viewClass" value="org.springframework.web.servlet.view.JstlView">     </property>
				   <property name="prefix" value="/WEB-INF/jsp/"/>
				   <property name="suffix" value=".jsp"/>
			        </bean>
			</list>
		</property>
	</bean>

Thanks