Webflux-Jackson将返回LocalDateTime为时间戳时失效

Webflux-Jackson将返回LocalDateTime为时间戳时失效

引入依赖

 <dependency>
     <groupId>com.fasterxml.jackson.datatypegroupId>
     <artifactId>jackson-datatype-jsr310artifactId>
dependency>
<dependency>
    <groupId>org.mybatisgroupId>
    <artifactId>mybatis-typehandlers-jsr310artifactId>
    <version>1.0.2version>
dependency>

将LocalDateTime返回前端时为时间戳

替换 Webflux 自动装配的 ObjectMapper

/**
 * 返回前端时， LocalDate, LocalDateTime, Date 返回时间戳处理
 */
@Configuration
public class JackSerializeConfiguration {

    @Bean
    @Order(0)
    @Primary
    public ObjectMapper objectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        //  时间项目推荐返回前端时间戳，前端根据需要自己转换格式
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        // 自定义 全局把时间转为 时间戳
        javaTimeModule.addSerializer(Date.class, new DateSerializer());
        javaTimeModule.addSerializer(LocalDate.class, new LocalDateSerializer());
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer());

        mapper.registerModule(javaTimeModule);
        mapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        return mapper;
    }


}


/**
 * jackson 处理 Date
 */
public class DateSerializer extends JsonSerializer<Date> {

    @Override
    public void serialize(Date value, JsonGenerator gen, SerializerProvider serializers) 
    							throws IOException {
        if (!Objects.isNull(value)) {
            gen.writeNumber(value.getTime());
        }
    }
}

自定义 ResultDataResponseBodyHandler

@Configuration
@EnableWebFlux
public class CustomWebfluxConfiguration implements WebFluxConfigurer{

    @Autowired
    private RequestedContentTypeResolver contentTypeResolver;

    @Autowired
    private ServerCodecConfigurer serverCodecConfigurer;

    public CustomWebfluxConfiguration(ResourceProperties resourceProperties,
                                      WebProperties webProperties, 
                                      WebFluxProperties webFluxProperties,
                                      ListableBeanFactory beanFactory,
                                      ObjectProvider<HandlerMethodArgumentResolver> resolvers,
                                      ObjectProvider<CodecCustomizer> codecCustomizers,
                                      ObjectProvider<ResourceHandlerRegistrationCustomizer> 
                                      			resourceHandlerRegistrationCustomizer,
                                      ObjectProvider<ViewResolver> viewResolvers) {
        super(resourceProperties, webProperties, webFluxProperties, beanFactory,
              resolvers, codecCustomizers, resourceHandlerRegistrationCustomizer, viewResolvers);
    }

    @Bean
    public ResultDataResponseBodyHandler responseBodyResultHandler() {
      return new ResultDataResponseBodyHandler(serverCodecConfigurer.getWriters(), contentTypeResolver);
    }


}

如果以上一种方式配置自定义的 ResultDataResponseBodyHandler， 会覆盖webflux自动装配的 WebFluxConfig, 在 WebFluxConfig 中配置了一些默认的 HttpMessageConverter会自动失效，导致 自定义配置的 ObjectMapper处理时间戳的配置失效， 所以这种方式不行

下面是可行方案，可以使自定义的ResultDataResponseBodyHandler 和 ObjectMapper都生效, 直接继承WebFluxConfg, 这样就有了默认的 HttpMessageConverter, 我们自定义的ObjectMapper也就生效了

@Configuration
@EnableWebFlux
public class CustomWebfluxConfiguration
        extends WebFluxAutoConfiguration.WebFluxConfig {

    @Autowired
    private RequestedContentTypeResolver contentTypeResolver;

    @Autowired
    private ServerCodecConfigurer serverCodecConfigurer;

    public CustomWebfluxConfiguration(ResourceProperties resourceProperties,
       		WebProperties webProperties, WebFluxProperties webFluxProperties,
             ListableBeanFactory beanFactory, ObjectProvider<HandlerMethodArgumentResolver> resolvers,
             ObjectProvider<CodecCustomizer> codecCustomizers,
             ObjectProvider<ResourceHandlerRegistrationCustomizer> resourceHandlerRegistrationCustomizer,
             ObjectProvider<ViewResolver> viewResolvers) {
        super(resourceProperties, webProperties, webFluxProperties, beanFactory,
        		resolvers, codecCustomizers,
                resourceHandlerRegistrationCustomizer, viewResolvers);
    }

    @Bean
    public ResultDataResponseBodyHandler responseBodyResultHandler() {
      return new ResultDataResponseBodyHandler(serverCodecConfigurer.getWriters(), contentTypeResolver);
    }


}

{
    "code": "200",
    "msg": "success",
    "subCode": null,
    "subMsg": null,
    "data": {
        "id": 1,
        "serviceId": "river-user",
        "filters": null,
        "predictes": null,
        "orderSeq": 1,
        "uri": "lb://river-user",
        "enable": 1,
        "createTime": 1618728527000,
        "updateTime": 1618728533000,
        "now": 1619020800000,
        "start": 1619096944713
    }
}