关于springmvc集成jackson问题

将jackson配置进spring内，利用spring的自动转化json向页面输出json数据，现在的情况是@jsonignore这个注解不被spring识别，但是我利用jackson的转换json的代码却可以正确实现，现贴上配置，求救
ignoreDefaultModelOnRedirect="true" validator="validator"
conversion-service="conversionService">

class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />



class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"
p:supportedMediaTypes="text/html;charset=UTF-8">

/mvc:message-converters
/mvc:annotation-driven

<bean id="conversionService"
    class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
    <property name="converters">
        <set>
            <bean class="com.suning.cybertron.superion.common.util.DateTimeConvert" />
        </set>
    </property>
</bean>


<bean id="webBindingInitializer"
    class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer">
    <property name="conversionService" ref="conversionService" />
</bean>


<bean
    class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
    <property name="webBindingInitializer" ref="webBindingInitializer" />
</bean>

<bean
    class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
    <property name="messageConverters">
        <list>
            <ref bean="mappingJacksonHttpMessageConverter" />
        </list>
    </property>
</bean>

<bean id="mappingJacksonHttpMessageConverter"
    class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
    <property name="supportedMediaTypes">
        <list>
            <value>text/html;charset=UTF-8</value>
        </list>
    </property>
</bean>

实体类中：
@ManyToMany(mappedBy="users")
@JsonIgnore
private Set<AlarmInfo> alarmInfos;