SpringMVC JackSon null属性不显示

转自：http://blog.csdn.net/mlz_2/article/details/52229456

spring+springmvc+jackson

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

POM

 <dependency>
     <groupId>com.fasterxml.jackson.coregroupId>
     <artifactId>jackson-coreartifactId>
     <version>${jackson.version}version>
 dependency>

 <dependency>
     <groupId>com.fasterxml.jackson.coregroupId>
     <artifactId>jackson-databindartifactId>
     <version>${jackson.version}version>
 dependency>

覆盖默认的

 <mvc:annotation-driven>
     <mvc:message-converters>
         <bean
             class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
             <property name="objectMapper" ref="objectMapper" />
         bean>
     mvc:message-converters>
 mvc:annotation-driven>

 <bean id="objectMapper" class="com.fasterxml.jackson.databind.ObjectMapper">
         <property name="dateFormat">
             <bean class="java.text.SimpleDateFormat">
                 <constructor-arg>
                     <value>yyyy-MM-dd HH:mm:ssvalue>
                 constructor-arg>
             bean>
         property>
         <property name="serializationInclusion">
             <value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULLvalue>
         property>
     bean>