Jackson2ObjectMapperBuilderCustomizer失效

Question

各位大咖，今天在学习全局定义时间格式的时候，发现了一个问题
就是在加入了WebMvcConfigurer实现类之后，我使用的Jackson2ObjectMapperBuilderCustomizer就失效了
这是实体类的代码，主要是定义了多个时间格式

@Data
@AllArgsConstructor
@NoArgsConstructor
@Builder
public class OrderDTO {

    private LocalDateTime createTime;

    private Date updateTime;

    private LocalDate createDate;

    private LocalTime localTime;
}

这是全局定义的代码

import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
import org.springframework.boot.jackson.JsonComponent;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;

/**
 * @author pengweixin
 */
@JsonComponent
@Configuration
public class DateFormatConfig {

    @Value("${spring.jackson.date-time-format:yyyy-MM-dd HH:mm:ss}")
    private String dataTimePattern;

    @Value("${spring.jackson.date-format:yyyy-MM-dd}")
    private String dataPattern;

    @Value("${spring.jackson.time-format:HH:mm:ss}")
    private String timePattern;

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilder() {

        return builder -> {
            DateFormat df = new SimpleDateFormat(dataTimePattern);
            builder.failOnEmptyBeans(false)
                    .failOnUnknownProperties(false)
                    .featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS)
                    .dateFormat(df);
        };
    }

    @Bean
    public LocalDateTimeSerializer localDateTimeDeserializer() {
        return new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(dataTimePattern));
    }

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return builder -> builder.serializerByType(LocalDateTime.class, localDateTimeDeserializer());
    }

    @Bean
    public LocalDateSerializer localDateDeserializer() {
        return new LocalDateSerializer(DateTimeFormatter.ofPattern(dataPattern));
    }

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderLocalDateCustomizer() {
        return builder -> builder.serializerByType(LocalDate.class, localDateDeserializer());
    }

    @Bean
    public LocalTimeSerializer localTimeDeserializer() {
        return new LocalTimeSerializer(DateTimeFormatter.ofPattern(timePattern));
    }

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderLocalTimeCustomizer() {
        return builder -> builder.serializerByType(LocalTime.class, localTimeDeserializer());
    }
}

不加入WebMvcConfigurer实现类之前，返回值是这样的

加入WebMvcConfigurer实现类之前，返回值是这样的

然后在百度搜索到说这是序列化格式的问题，要加一个格式，最后WebMvcConfigurer实现类是这样的

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
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.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import java.util.List;

@Configuration // 配置类
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        ObjectMapper objectMapper = jackson2HttpMessageConverter.getObjectMapper();
        // 不显示为null的字段
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
        objectMapper.registerModule(simpleModule);
        objectMapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
        jackson2HttpMessageConverter.setObjectMapper(objectMapper);
        // 放到第一个
        converters.add(0, jackson2HttpMessageConverter);
    }
}

但是加入之后，我的全局定义还是没有实现
这是什么原因导致的呢，有没有哪位大咖能解答一下，不胜感激！

Answer 1

直接把@EnableWebMvc删了就可以了