Namespace declaration
Spring 3.1
For Spring 3.1 use:
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">
</beans>
Message converters
As of Spring 3.1, you can specify custom object mappers for Jackson using the mvc:message-converter element.
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
<property name="objectMapper" ref="customObjectMapper"/>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>
In the above context, there is a bean customObjectMapper which is a subclass
of org.codehaus.jackson.map.ObjectMapper.