FastJson全局配置

@Configuration
public class JsonConfig implements WebMvcConfigurer {
    @Bean
    public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {
        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();
        FastJsonConfig config = new FastJsonConfig();
        config.setCharset(StandardCharsets.UTF_8);
        // 在这里配置其他 Fastjson 的行为，例如日期格式、禁用HTML转义等
        config.setSerializerFeatures(SerializerFeature.WriteSlashAsSpecial);

        SerializeConfig serializeConfig = SerializeConfig.globalInstance;
        // 解决@JsonSerialize注解转换long类型字段不生效的问题
        serializeConfig.put(Long.class, ToStringSerializer.instance);
        serializeConfig.put(Long.TYPE, ToStringSerializer.instance);
        config.setSerializeConfig(serializeConfig);
        // 解决@JsonFormat转换日期格式不生效的问题
        config.setSerializerFeatures(SerializerFeature.WriteDateUseDateFormat);
        config.setDateFormat("yyyy-MM-dd HH:mm:ss");

        // 解决引用问题
        config.setSerializerFeatures(SerializerFeature.DisableCircularReferenceDetect);

        converter.setFastJsonConfig(config);
        List<MediaType> supportedMediaTypes = new ArrayList<>();
        supportedMediaTypes.add(MediaType.APPLICATION_JSON);
        converter.setSupportedMediaTypes(supportedMediaTypes);
        return converter;
    }

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