JSON时间转化统一配置突然失效

JSON时间转化统一配置突然失效，导致后台没办法直接接收到string类型的date格式。
后面追踪原因是Jackson2ObjectMapperBuilderCustomizer不生效了。该bean直接不能注册到spring容器。

package com.inspur.cnet.console.config;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.core.Ordered;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

@Component
public class MyJackson2ObjectMapperBuilderCustomizer implements Jackson2ObjectMapperBuilderCustomizer, Ordered {
    @Override
    public void customize(Jackson2ObjectMapperBuilder jacksonObjectMapperBuilder) {
        //若POJO对象的属性值为null，序列化时不进行显示
        jacksonObjectMapperBuilder.serializationInclusion(JsonInclude.Include.NON_NULL);
        //若POJO对象的属性值为""，序列化时不进行显示
        jacksonObjectMapperBuilder.serializationInclusion(JsonInclude.Include.NON_EMPTY);
        //DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES相当于配置，JSON串含有未知字段时，反序列化依旧可以成功
        jacksonObjectMapperBuilder.failOnUnknownProperties(false);

        //针对于Date类型，文本格式化
        jacksonObjectMapperBuilder.simpleDateFormat("yyyy-MM-dd HH:mm:ss");

        //针对于JDK新时间类。序列化时带有T的问题，自定义格式化字符串
        JavaTimeModule javaTimeModule = new JavaTimeModule();
        javaTimeModule.addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        javaTimeModule.addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
        jacksonObjectMapperBuilder.modules(javaTimeModule);
    }

    @Override
    public int getOrder() {
        return 1;
    }
}

这个配置直接没办法生效，原因看大佬说是不生效的原因一般是MappingJackson2HttpMessageConverter的对象在程序启动时创建了多个，我们只要将多余的去掉，并重新添加MappingJackson2HttpMessageConverter的bean就可以了。Jackson2ObjectMapperBuilderCustomizer

所以我们在工程里配置一个下面的类：

package com.inspur.cnet.console.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.List;
import java.util.Objects;

@Configuration
@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
public class ConvertConfiguration implements WebMvcConfigurer {

    @Autowired(required = false)
    private MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter;

    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        converters.removeIf(converter -> converter instanceof MappingJackson2HttpMessageConverter);
        if (Objects.isNull(mappingJackson2HttpMessageConverter)) {
            converters.add(0, new MappingJackson2HttpMessageConverter());
        } else {
            converters.add(0, mappingJackson2HttpMessageConverter);
        }
 
    }
}

至于为啥突然这个工程里面的MappingJackson2HttpMessageConverter创建了多个，暂时不清楚，今天突然碰到这种情况，一般bean都是唯一的。