在ASP.NET Core3.0中使用System.Text.Json格式化DateTime

using System.Text.Json;

var options = new JsonSerializerOptions
{
    PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
    WriteIndented = true,
    Converters =
    {
        new DateTimeConverterUsingDateTimeParse()
    }
};

public class DateTimeConverterUsingDateTimeParse : JsonConverter<DateTime>
{
    public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
    {
        return DateTime.Parse(reader.GetString());
    }

    public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
    {
        writer.WriteStringValue(value.ToString("yyyy-MM-ddTHH:mm:ss.fffZ"));
    }
}

var dateTime = DateTime.Now;
var json = JsonSerializer.Serialize(dateTime, options);

var dateTime = JsonSerializer.Deserialize<DateTime>(json, options);