spring mvc中应用@ResponseBody的配置

<!-- spring mvc中@ResponseBody对象转json -->
 <bean class ="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" >  
    <property name="messageConverters">  
  <list>  
   <ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器  --> 
  </list>  
</property>  
</bean>      
<bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter" />