@Log4j2
@Configuration
public class WebConfig extends WebMvcConfigurationSupport {

  @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        super.configureMessageConverters(converters);

        //支持XML
        List<MediaType> xmlMediaTypes = new ArrayList<>();
        xmlMediaTypes.add(MediaType.TEXT_XML);
        StringHttpMessageConverter xmlMessageConverter = new StringHttpMessageConverter();
        xmlMessageConverter.setSupportedMediaTypes(xmlMediaTypes);
        converters.add(xmlMessageConverter);

        //JSON
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(
                SerializerFeature.PrettyFormat,
                //int类型的key 加引号
                SerializerFeature.WriteNonStringKeyAsString,
                //保留map空的字段
                SerializerFeature.WriteMapNullValue,
                //将Number类型的null转成0
                SerializerFeature.WriteNullNumberAsZero,
                // 将List类型的null转成[]
                SerializerFeature.WriteNullListAsEmpty,
                // 将Boolean类型的null转成false
                SerializerFeature.WriteNullBooleanAsFalse);
        fastJsonConfig.setDateFormat("yyyy-MM-dd HH:mm:ss");
        //处理中文乱码问题
        List<MediaType> fastMediaTypes = new ArrayList<>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastConverter.setSupportedMediaTypes(fastMediaTypes);
        fastConverter.setFastJsonConfig(fastJsonConfig);
        converters.add(fastConverter);

    }


}