.net 5 json 序列化时间格式设置

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//mvc服务            services.AddControllersWithViews(options => {            }).AddJsonOptions(a => a.JsonSerializerOptions.Converters.Add(new FzCyjh.YunSdkAJ.Common.DateTimeJsonConverter()));

　　

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/// <summary>    ///    /// </summary>    public class DateTimeJsonConverter : JsonConverter<DateTime> {        private readonly string _dateFormatString;        /// <summary>        ///        /// </summary>        public DateTimeJsonConverter() {            _dateFormatString = "yyyy-MM-dd HH:mm:ss";        }        /// <summary>        ///        /// </summary>        /// <param name="dateFormatString"></param>        public DateTimeJsonConverter(string dateFormatString) {            _dateFormatString = dateFormatString;        }        /// <summary>        ///        /// </summary>        /// <param name="reader"></param>        /// <param name="typeToConvert"></param>        /// <param name="options"></param>        /// <returns></returns>        public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) {            return DateTime.Parse(reader.GetString());        }        /// <summary>        ///        /// </summary>        /// <param name="writer"></param>        /// <param name="value"></param>        /// <param name="options"></param>        public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options) {            writer.WriteStringValue(value.ToString(_dateFormatString));        }    }

　　

  Newtonsoft.Json.JsonSerializerSettings setting = new Newtonsoft.Json.JsonSerializerSettings();
            Newtonsoft.Json.JsonConvert.DefaultSettings = new Func<Newtonsoft.Json.JsonSerializerSettings>(() => {
                //日期类型默认格式化处理
                setting.DateFormatHandling = Newtonsoft.Json.DateFormatHandling.MicrosoftDateFormat;
                setting.DateFormatString = "yyyy-MM-dd HH:mm:ss.fff";

                //空值处理
                setting.NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore;

                return setting;
            });