Spring MVC返回的json去除根节点名称的方法

<property name="defaultViews">
<list>
<bean class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
</bean>
</list>
</property>

{"commonAjaxResponse":{"code":1,"errorCode":null,"errorMessage":null,"data":{"key":"123"}}}

<property name="defaultViews">
<list>
<bean
class="org.springframework.web.servlet.view.json.MappingJackson2JsonView">
<property name="extractValueFromSingleKeyModel" value="true" />
</bean>
</list>
</property>

{"code":1,"errorCode":null,"errorMessage":null,"data":{"key":"123"}}