全局處理long類型精度丟失返回前端問題，fastjson

    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        Map<Class<?>, JsonSerializer<?>> map = new HashMap<>();
        map.put(Long.class, ToStringSerializer.instance);
        return builder -> builder.serializersByType(map);
    }