json返回值过滤null值

1.全局配置
@Configuration
public class JackSonConfig {
    @Bean
    @Primary
    @ConditionalOnMissingBean(ObjectMapper.class)
    public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        return objectMapper;
    }
}

或者

<mvc:annotation-driven>
	    <!-- 强化参数接收 -->
		<mvc:argument-resolvers>
			<bean class="org.durcframework.common.form.FormModelMethodArgumentResolver" />
		</mvc:argument-resolvers>
		 
        <mvc:message-converters>  
            <bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">  
                <property name="objectMapper">  
                    <bean class="com.fasterxml.jackson.databind.ObjectMapper">
                    	<!-- 处理responseBody 里面日期类型 -->  
                        <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字段时不显示 -->
                        <property name="serializationInclusion">
                            <value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value>
                        </property> 
                    </bean>  
                </property>  
            </bean>  
        </mvc:message-converters>  
	</mvc:annotation-driven>

2.部分配置

@JsonInclude(Include.NON_NULL)
public class XXXX{
}