Solved: Customized global serialization and the configuration file does not take effect

Some time ago, the project was configured with global serialization, but there was a bug again online, because the global serialization did not take effect.
Check the configuration WebMvcConfigurationSupport long found
so moving sequence of global configuration file to configure the WebMvcConfigurationSupport WebMvcConfig class
Why is this so please see the reason inherit WebMvcConfigurationSupport class is automatically configured can cause failure

• Old configuration file

/**
 * Jackson配置类
 * 因为配置了WebMvcConfigurationSupport 导致配置失效
 */
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(Jackson2ObjectMapperBuilder.class)
public class JacksonConfig {
    
    
  @Bean
    @Primary
    @ConditionalOnMissingBean(ObjectMapper.class)
    public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {
    
    
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
        // 注册转换器
        SimpleModule bigDecimalModule = new SimpleModule();
        //序列化将BigDecimal转String类型
        bigDecimalModule.addSerializer(BigDecimal.class, BigDecimalStringSerializer.instance);
        objectMapper.registerModule(bigDecimalModule);
        // 通过该方法对mapper对象进行设置，所有序列化的对象都将按改规则进行系列化
        // Include.Include.ALWAYS 默认
        // Include.NON_DEFAULT 属性为默认值不序列化
        // Include.NON_EMPTY 属性为 空（""） 或者为 NULL 都不序列化，则返回的json是没有这个字段的。这样对移动端会更省流量
        // Include.NON_NULL 属性为NULL 不序列化,就是为null的字段不参加序列化
        objectMapper.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
        objectMapper.setDateFormat(new SimpleDateFormat(DatePattern.NORM_DATETIME_PATTERN));
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        return objectMapper;
    }
}

• New configuration file:

@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {
    
    
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
    
    
        registry.addResourceHandler("doc.html")
                .addResourceLocations("classpath:/META-INF/resources/");
        registry.addResourceHandler("/webjars/**")
                .addResourceLocations("classpath:/META-INF/resources/webjars/");
    }
    @Bean
    public HandlerInterceptor getMyInterceptor() {
    
    
        return new WxPayInterceptor();
    }

    /**
     * 重新设置json转换器
     * @return
     */
    @Bean
    public MappingJackson2HttpMessageConverter customJackson2HttpMessageConverter() {
    
    
        MappingJackson2HttpMessageConverter jsonConverter = new MappingJackson2HttpMessageConverter();
        ObjectMapper objectMapper = new ObjectMapper();
//        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
//        objectMapper.configure(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_AS_NULL, true);
//        objectMapper.setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE);
        objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        objectMapper.setDateFormat(new SimpleDateFormat(DatePattern.NORM_DATETIME_PATTERN));
        SimpleModule bigDecimalModule = new SimpleModule();
        //序列化将BigDecimal转String类型
        bigDecimalModule.addSerializer(BigDecimal.class, BigDecimalStringSerializer.instance);
        objectMapper.registerModule(bigDecimalModule);
        jsonConverter.setObjectMapper(objectMapper);
        return jsonConverter;
    }
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
    
    
        converters.add(customJackson2HttpMessageConverter());
        super.addDefaultHttpMessageConverters(converters);
    }
}