通过jackson使spring springmvc 在ajax返回时，不输出为null 的对应属性

<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.4.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.8.10</version>
</dependency>

<!-- 配置json转换器 -->
<bean id="objectMapperingJackson" class="com.fasterxml.jackson.databind.ObjectMapper">
<!-- 时间格式转换 -->
<property name="dateFormat">
<bean class="java.text.SimpleDateFormat">
<constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss"/>
</bean>
</property>
<!-- 为null字段时不转换 -->
<property name="serializationInclusion">
<value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>
</property>
</bean>

<!--控制器映射器和控制器适配器 开启注解-->
<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="objectMapper" ref="objectMapperingJackson"/>
</bean>
</mvc:message-converters>
</mvc:annotation-driven>