在和前端对接时，经常会接收 "yyyy-MM-dd HH:mm:ss" 格式数据，然后后端通过localdateTime接收这时就需要做一些配置

@Configuration
public class JacksonConfig {

    @Bean
    @Order(Ordered.HIGHEST_PRECEDENCE)
    public Jackson2ObjectMapperBuilderCustomizer customJackson() {
        return builder -> {
            builder.serializerByType(LocalDateTime.class,
                    new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
            builder.serializerByType(LocalDate.class,
                    new LocalDateSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
            builder.serializerByType(LocalTime.class,
                    new LocalTimeSerializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
            builder.deserializerByType(LocalDateTime.class,
                    new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
            builder.deserializerByType(LocalDate.class,
                    new LocalDateDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
            builder.deserializerByType(LocalTime.class,
                    new LocalTimeDeserializer(DateTimeFormatter.ofPattern("HH:mm:ss")));
            // builder.serializationInclusion(JsonInclude.Include.NON_NULL);

            // 避免Long精度丢失，超过JS最大精度，使用String类型
            builder.serializerByType(Long.class, BigNumberSerializer.INSTANCE);

            builder.failOnUnknownProperties(false);
            builder.featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        };
    }
}

当然还有其他方法，个人觉得，这个最方便