SpringBoot配置MessageConvert，取消字段首字母大写自动转小写

方式一：

@Bean
public HttpMessageConverters fastJsonHttpMessageConverters() {
    //1.定义一个Convert转换消息的对象
    FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
    //2.设置特性
    //非线程安全，确保执行一次
    TypeUtils.compatibleWithFieldName = true;
    FastJsonConfig fastJsonConfig = new FastJsonConfig();
    fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
    //3.在convert中添加配置信息
    fastConverter.setFastJsonConfig(fastJsonConfig);
    return new HttpMessageConverters(fastConverter);
}

方式二：
@Component
public class KapiWebMvcConfigurer implements WebMvcConfigurer {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        TypeUtils.compatibleWithFieldName = true;
        //1.定义一个convert转换消息对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        //2.添加fastjson的配置信息
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.SortField);
        fastConverter.setFastJsonConfig(fastJsonConfig);
        //3.将convert添加到converters中
        converters.add(NumberUtils.INTEGER_ZERO, fastConverter);
    }
}