SpringMVC JackSon null属性不显示

转自：http://blog.youkuaiyun.com/mlz_2/article/details/52229456

spring+springmvc+jackson

如果返回的是List<ObjectClass>，而ObjectClass对象的某个属性值是null，此时不返回这个属性。

POM

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1. <dependency>  
2.     <groupId>com.fasterxml.jackson.core</groupId>  
3.     <artifactId>jackson-core</artifactId>  
4.     <version>${jackson.version}</version>  
5. </dependency>  
6.   
7. <dependency>  
8.     <groupId>com.fasterxml.jackson.core</groupId>  
9.     <artifactId>jackson-databind</artifactId>  
10.     <version>${jackson.version}</version>  
11. </dependency>  

覆盖默认的

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1. <mvc:annotation-driven>  
2.     <mvc:message-converters>  
3.         <bean  
4.             class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">  
5.             <property name="objectMapper" ref="objectMapper" />  
6.         </bean>  
7.     </mvc:message-converters>  
8. </mvc:annotation-driven>  

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1. <bean id="objectMapper" class="com.fasterxml.jackson.databind.ObjectMapper">  
2.         <property name="dateFormat">  
3.             <bean class="java.text.SimpleDateFormat">  
4.                 <constructor-arg>  
5.                     <value>yyyy-MM-dd HH:mm:ss</value>  
6.                 </constructor-arg>  
7.             </bean>  
8.         </property>  
9.         <property name="serializationInclusion">  
10.             <value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>  
11.         </property>  
12.     </bean>