spring boot整合mongo查询converter异常排查记录

import org.springframework.core.convert.converter.Converter;
import java.sql.Timestamp;
import java.util.Date;
public class TimestampConverter implements Converter {
    public Timestamp convert(Date date) {
        if(date != null){
            return new Timestamp(date.getTime());
        }
        return null;
    }
}

@Configuration
public class mongoDBConfig {
    @Bean
    public MongoTemplate getMongoTemplate(MongoDbFactory dbFactory,MappingMongoConverter converter) {
        MongoTemplate template = new MongoTemplate(dbFactory, converter);
        return template;
    }
    @Bean
    public MappingMongoConverter mappingMongoConverter(MongoDbFactory factory, MongoMappinGContext context, BeanFactory beanFactory,CustomConversions conversions) {
        DbRefResolver dbRefResolver = new DefaultDbRefResolver(factory);
        MappingMongoConverter mappingConverter = new MappingMongoConverter(dbRefResolver, context);
        mappingConverter.setCustomConversions(beanFactory.getBean(CustomConversions.class));
        mappingConverter.setTypeMapper(new DefaultMongoTypeMapper(null));//去掉默认mapper添加的_class
        mappingConverter.setCustomConversions(conversions);//添加自定义的转换器
        return mappingConverter;
    }
    @Bean
    public CustomConversions customConversions() {
        List list = new ArrayList();
        list.add(new TimestampConverter());
        return new CustomConversions(list);
    }
}