asp.net core 3.0 MVC JSON 全局配置

• System.Text.Json(default)

1. startup配置代码如下：

using System.Text.Encodings.Web;

using System.Text.Json;

using System.Text.Unicode;

public void ConfigureServices(IServiceCollection services)

{

     services.AddJsonOptions(options =>

            {

                //格式化日期时间格式

                options.JsonSerializerOptions.Converters.Add(new DatetimeJsonConverter());

                //数据格式首字母小写

                //options.JsonSerializerOptions.PropertyNamingPolicy =JsonNamingPolicy.CamelCase;

                //数据格式原样输出

                options.JsonSerializerOptions.PropertyNamingPolicy = null;

                //取消Unicode编码

                options.JsonSerializerOptions.Encoder = JavaScriptEncoder.Create(UnicodeRanges.All);

                //忽略空值

                options.JsonSerializerOptions.IgnoreNullValues = true;

                //允许额外符号

                options.JsonSerializerOptions.AllowTrailingCommas = true;

                //反序列化过程中属性名称是否使用不区分大小写的比较

                options.JsonSerializerOptions.PropertyNameCaseInsensitive = false;

            });

}

using System;

using System.Text.Json;

using System.Text.Json.Serialization;

public class DatetimeJsonConverter : JsonConverter<DateTime>

    {

        public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)

        {

            if (reader.TokenType == JsonTokenType.String)

            {

                if (DateTime.TryParse(reader.GetString(), out DateTime date))

                    return date;

            }

            return reader.GetDateTime();

        }

        public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)

        {

            writer.WriteStringValue(value.ToString("yyyy-MM-dd HH:mm:ss"));

        }

    }

1. 官方API

• Newtonsoft.Json

1. Install-Package Microsoft.AspNetCore.Mvc.NewtonsoftJson -Version 3.1.0
2. startup配置代码如下：

using Newtonsoft.Json;

using Newtonsoft.Json.Serialization;

public void ConfigureServices(IServiceCollection services)

{

    services.AddControllersWithViews(...).AddNewtonsoftJson(options =>

            {

                //设置时间格式

                options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss";

                //忽略循环引用

                options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;

                //数据格式首字母小写

                //options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();

                //数据格式按原样输出

                options.SerializerSettings.ContractResolver = new DefaultContractResolver();

                //忽略空值

                options.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;

            });

}