如何在 YAML 文件中配置 WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS 用于 Spring Boot 中的 Jackson 反序列化？

Question

I receive a timestamp as a number from a javascript application and my RestController exposes an endpoint with a bean structure and a ZonedDateTime to store this value.

There is a check into the InstantDeserializer class for the WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS DeserializationFeature, and the value is always true even if I put the following configuration in my application.yml:

spring:
    jackson:
        deserialization:
            WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS: false

Any ideas?

---

My YAML configuration is not read. Even if I put all the features to false, I still get the context.isEnabled(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS) test to true in InstantDeserializer:

spring:
    jackson:
        serialization:
            WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS: false
            READ_DATE_TIMESTAMPS_AS_NANOSECONDS: false
        deserialization:
            WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS: false
            READ_DATE_TIMESTAMPS_AS_NANOSECONDS: false

Answer 1

That is a SerializationFeature not a DeserializationFeature one, so try the following:

spring:
    jackson:
        serialization:
            write-date-timestamps-as-nanoseconds: false

Check the reference documentation .

( Thanks @Arnaud for the hint ) Given that you seem to be interested in deserialization it might instead be relevant to check the following feature:

spring:
    jackson:
        deserialization:
            read-date-timestamps-as-nanoseconds: false

You can also configure it using a Configuration file:

@Configuration
public class JacksonConfiguration {
    @Bean
    public ObjectMapper objectMapper() {
        return new ObjectMapper()
            .disable(DeserializationFeature.READ_DATE_TIMESTAMPS_AS_NANOSECONDS);
    }
}

Check the reference documentation .