Spring4.0 MVC请求json数据报406错误的解决方法

<!-- 避免IE执行AJAX时,返回JSON出现下载文件spring3为：org.springframework.http.converter.json.MappingJacksonHttpMessageConverterspring4为：org.springframework.http.converter.json.MappingJackson2HttpMessageConverter -->  <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">    <property name="supportedMediaTypes">      <list>        <value>text/html;charset=UTF-8</value>      </list>    </property>  </bean>   <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->  <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">    <property name="messageConverters">      <list>        <ref bean="mappingJacksonHttpMessageConverter" /><!-- json转换器 -->      </list>    </property>  </bean>  

<mvc:annotation-driven>   <mvc:message-converters register-defaults="true">     <!-- 避免IE执行AJAX时,返回JSON出现下载文件 -->     <bean id="fastJsonHttpMessageConverter" class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">       <property name="supportedMediaTypes">         <list>           <value>application/json;charset=UTF-8</value>         </list>       </property>     </bean>   </mvc:message-converters> </mvc:annotation-driven>