.NETCore JsonLocalDateTimeConverter类，自定义格式化时间

internal class JsonLocalDateTimeConverter : JsonConverter<DateTime>
    {
        private string _format;

        public JsonLocalDateTimeConverter(string format)
        {
            this._format = format;
        }

        public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            String str = reader.GetString();
            DateTime result;
            if (DateTime.TryParse(str, out result))
            {
                return result;
            }
            else
            {
                return DateTime.ParseExact(str, _format, null);
            }
        }

        public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
        {
            writer.WriteStringValue(value.ToString(_format));
        }
    }

//自定义日期格式转换器
config.JsonSerializerOptions.Converters.Add(new JsonLocalDateTimeConverter("yyyy-MM-ddTHH:mm:ss"));