1 /// <summary>
 2     /// 解决特别小的小数0.000000001 序列化成科学计数法。 这里把decimal类型转成string
 3     /// </summary>
 4     public class DecimalConvert : CustomCreationConverter<decimal>
 5     {
 6         public override decimal Create(Type objectType)
 7         {
 8             return 0;
 9         }
10         public override bool CanWrite => true;
11         public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
12         {
13             if (value == null)
14             {
15                 writer.WriteNull();
16                 return;
17             }
18             writer.WriteValue(value.ToString());
19         }
20     }

1 public void ConfigureServices(IServiceCollection services)
2  {
3 　　services.AddMvc().AddJsonOptions(options =>
4             {
5                 options.SerializerSettings.Converters.Add(new DecimalConvert());
6             });
7 }