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 ().

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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

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如果把配置换成

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

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

则会报异常。

那么需要补充配置

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<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"/>

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-- 其他的list的没写，只是为了测试

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http://stackoverflow.com/questions/3340050/springs-json-not-being-resolved-with-appropriate-response

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http://stackoverflow.com/questions/2828968/mapping-restful-ajax-requests-to-spring