spring mvc返回json格式疑问@ResponseBody

The resource identified by this request is only capable of generating responses with 
characteristics not acceptable according to the request "accept" headers ().

经过排查原来是配置文件方式不同引起的：

首先引入

jackson-core-asl-1.6.4.jar

jackson-mapper-asl-1.6.4.jar

如果是：

<mvc:annotation-driven />

那么则没有问题

如果把配置换成

<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

则会报异常。

那么需要补充配置

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">

   <property name="messageConverters">

   <list>

   <ref bean="jsonHttpMessageConverter"/>

   </list>

   </property>

</bean>

<bean id="jsonHttpMessageConverter" 

       class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"/>