这是Jackson的一个已知问题，会影响ZonedDateTime对象的序列化。
这个问题是由于Jackson默认使用Java内置的DateTimeFormatter来序列化和反序列化日期和时间，所以这种格式不会以毫秒为单位保留尾随的零。
要解决此问题，可以将Jackson配置为使用自定义日期/时间格式，该格式以毫秒为单位保留尾随零
我尝试了这个方法，并为Jackson创建了一个custome配置：

@Configuration
public class JacksonConfig {

    @Value("${spring.jackson.date-format}")
    private String dateFormat;

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jacksonCustomizer() {
        return builder -> {
            DateTimeFormatter formatter = DateTimeFormatter.ofPattern(dateFormat);
            builder.simpleDateFormat(dateFormat).serializers(new ZonedDateTimeSerializer(formatter));
            builder.deserializers(new ZonedDateTimeDeserializer(formatter));
        };
    }

    public static class ZonedDateTimeSerializer extends StdSerializer<ZonedDateTime> {

        private final DateTimeFormatter formatter;

        public ZonedDateTimeSerializer(DateTimeFormatter formatter) {
            super(ZonedDateTime.class);
            this.formatter = formatter;
        }

        @Override
        public void serialize(ZonedDateTime value, JsonGenerator gen, SerializerProvider provider) throws IOException {
            gen.writeString(formatter.format(value));
        }
    }

    public static class ZonedDateTimeDeserializer extends StdDeserializer<ZonedDateTime> {

        private final DateTimeFormatter formatter;

        public ZonedDateTimeDeserializer(DateTimeFormatter formatter) {
            super(ZonedDateTime.class);
            this.formatter = formatter;
        }

        @Override
        public ZonedDateTime deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
            String value = p.getValueAsString();
            return ZonedDateTime.parse(value, formatter);
        }
    }
}