Java 8 Date/Time (JSR-310) types mapping with Spring Data MongoDB

Question

I have simple document with Java 8 date/time fields

@Document
public class Token {
    private Instant createdAt;
    ...
}

that I want to

Answer 1

@user882209 explained it all just perfectly.
Since Spring Data MongoDB 1.7 the support for JSR-310 has been added.
If application is backed by Spring Boot every version over 1.2.8 would contain it as well.
In a Spring Boot-ed app you can just do it the following:

@Configuration
public class MongoDbConfig {

    @Autowired
    private MongoDbFactory mongoDbFactory;

    @Bean
    public MongoTemplate mongoTemplate() {
        MappingMongoConverter converter = new MappingMongoConverter(new DefaultDbRefResolver(mongoDbFactory),
            new MongoMappingContext());
        converter.setCustomConversions(new CustomConversions(Arrays.asList(...)));

    return new MongoTemplate(mongoDbFactory, converter);
    }
}

The following converters are provided by the Jsr310Converters class:
DateToLocalDateTimeConverter - LocalDateTimeToDateConverter DateToLocalDateConverter - LocalDateToDateConverter DateToLocalTimeConverter - LocalTimeToDateConverter DateToInstantConverter - InstantToDateConverter