在Spring Boot 1.2.3中，我们可以通过属性文件来自定义Jackson
Jackson。但是我没有找到将Object序列化为JSON字符串时可以设置Jackson忽略null值的属性。

spring.jackson.deserialization.*= # see Jackson's DeserializationFeature
spring.jackson.generator.*= # see Jackson's JsonGenerator.Feature
spring.jackson.mapper.*= # see Jackson's MapperFeature
spring.jackson.parser.*= # see Jackson's JsonParser.Feature
spring.jackson.serialization.*=

我想将相同的代码存档

ObjectMapper mapper = new ObjectMapper();
mapper.setSerializationInclusion(Include.NON_NULL);