如何解决LocalDateTime传值JSON格式化问题

// import ...
@Configuration
@EnableWebMvc
public class WebMvcConfig implements WebMvcConfigurer {
    
    /**
     * 自定义String转LocalDateTime方法，此方法将会作用于url所携带的参数上
     */
    static class StringToLocalDateTimeConverter implements Converter<String, LocalDateTime> {
        @Override
        public LocalDateTime convert(String s) {
            DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
            return LocalDateTime.parse(s, formatter);
        }
    }
    /**
     * 将上述自定义方法进行添加
     */
    @Override
    public void addFormatters(FormatterRegistry registry) {
        registry.addConverter(new StringToLocalDateTimeConverter());
    }
    
    /**
     * 增加序列化与反序列化器，它们将作用于实体类的LocalDateTime属性。
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        DateTimeFormatter pattern = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
        ObjectMapper objectMapper = new ObjectMapper();
        JavaTimeModule module = new JavaTimeModule();
        module.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(pattern));
        module.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(pattern));
        objectMapper.registerModule(module);
        converters.add(new MappingJackson2HttpMessageConverter(objectMapper));
    }
}

public void Test(@RequestParam @DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss") LocalDateTime time) {
    ...
}

@Data
public class Demo {
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    private LocalDateTime time;
    
}

@Configuration
public class LocalDateTimeSerializerConfig {
    @Value("${spring.jackson.date-format:yyyy-MM-dd HH:mm:ss}")
    private String pattern;
    public LocalDateTimeSerializer localDateTimeDeserializer() {
        return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(pattern));
    }
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return builder -> builder.serializerByType(LocalDateTime.class, localDateTimeDeserializer());
    }
}

@JsonFormat(pattern = "yyyy-MM-dd")
@ApiModelProperty(value = "创建时间")
private LocalDateTime createTime;