对于spring引导api:

@Configuration
public class JsonConfig {

    @Bean
    public MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter() {
        MappingJackson2HttpMessageConverter jsonConverter = new MappingJackson2HttpMessageConverter();
        ObjectMapper mapper = new ObjectMapper();

        mapper.registerModule(new ParameterNamesModule())
                .registerModule(new Jdk8Module())
                .registerModule(new JavaTimeModule());

        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);// will remove value properties
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        jsonConverter.setObjectMapper(mapper);
        return jsonConverter;
    }
}

导入以下依赖项:

implementation 'com.fasterxml.jackson.core:jackson-core:2.13.0'
implementation 'com.fasterxml.jackson.core:jackson-databind:2.13.0'
implementation 'com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.13.0'

我在使用Spring boot时遇到了类似的问题。 使用Spring启动1.5.1。我所要做的就是添加依赖项:

<dependency>
    <groupId>com.fasterxml.jackson.datatype</groupId>
    <artifactId>jackson-datatype-jsr310</artifactId>
</dependency>

我使用这个时间格式:"{birthDate": "2018-05-24T13:56:13Z}"从json反序列化为java.time.Instant(见截图)

@JsonDeserialize(using = LocalDateTimeDeserializer.class)
@JsonSerialize(using = LocalDateTimeSerializer.class)
private LocalDateTime createTime;

这对我来说很有效。

如果你正在使用Jersey，那么你需要像其他人建议的那样添加Maven依赖项(jackson- dattype -jsr310)，并像这样注册你的对象映射器实例:

@Provider
public class JacksonObjectMapper implements ContextResolver<ObjectMapper> {

  final ObjectMapper defaultObjectMapper;

  public JacksonObjectMapper() {
    defaultObjectMapper = createDefaultMapper();
  }

  @Override
  public ObjectMapper getContext(Class<?> type) {
    return defaultObjectMapper;
  }

  private static ObjectMapper createDefaultMapper() {
    final ObjectMapper mapper = new ObjectMapper();    
    mapper.registerModule(new JavaTimeModule());
    return mapper;
  }
}

当在你的资源中注册Jackson时，你需要像这样添加这个映射器:

final ResourceConfig rc = new ResourceConfig().packages("<your package>");
rc
  .register(JacksonObjectMapper.class)
  .register(JacksonJaxbJsonProvider.class);

我想为Spring的DurationStyle解析提供支持，在使用Jackson反序列化的自定义配置文件中的属性文件中提供支持，例如将20s序列化为Duration PT20S。我通过在ObjectMapper实例上注册一个自定义反序列化器来实现这一点:

@Bean("customConfigMapper")
public ObjectMapper customConfigMapper() {
    final ObjectMapper mapper = new ObjectMapper();
    final SimpleModule module = new SimpleModule();
    module.addDeserializer(Duration.class, new SpringDurationStyleDeserializer());
    mapper.registerModule(module);
    return mapper;
}

public static class SpringDurationStyleDeserializer extends JsonDeserializer<Duration> {
    @Override
    public Duration deserialize(JsonParser jsonParser, DeserializationContext __) throws IOException {
        return Optional.ofNullable(jsonParser.getText()).map(DurationStyle::detectAndParse).orElse(null);
    }
}