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Newtonsoft.Json与System.Text.Json区别 在 Newtonsoft.Json中可以使用例如 .AddJsonOptions(options => { options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss"; })

方法设置接收/序列化时间格局，但在.net core 3.1中System.Text.Json是没有自带方法进行转换，这就需要自界说Converter实现时间转换
官方GitHub地点

自界说DateTimeJsonConverter public class DateTimeJsonConverter : JsonConverter<DateTime> { private readonly string _dateFormatString; public DateTimeJsonConverter() { _dateFormatString = "yyyy-MM-dd HH:mm:ss"; } public DateTimeJsonConverter(string dateFormatString) { _dateFormatString = dateFormatString; } 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.ToUniversalTime().ToString(_dateFormatString)); } } JsonTokenType枚举类型共有以下几种 /// <summary>Defines the various JSON tokens that make up a JSON text.</summary> public enum JsonTokenType : byte { /// <summary>There is no value (as distinct from <see cref="F:System.Text.Json.JsonTokenType.Null" />).</summary> None, /// <summary>The token type is the start of a JSON object.</summary> StartObject, /// <summary>The token type is the end of a JSON object.</summary> EndObject, /// <summary>The token type is the start of a JSON array.</summary> StartArray, /// <summary>The token type is the end of a JSON array.</summary> EndArray, /// <summary>The token type is a JSON property name.</summary> PropertyName, /// <summary>The token type is a comment string.</summary> Comment, /// <summary>The token type is a JSON string.</summary> String, /// <summary>The token type is a JSON number.</summary> Number, /// <summary>The token type is the JSON literal true.</summary> True, /// <summary>The token type is the JSON literal false.</summary> False, /// <summary>The token type is the JSON literal null.</summary> Null, }

services.AddMvc 中 Newtonsoft.Json与System.Text.Json 配置区别 .netcore 2.1 services //全局配置Json序列化措置惩罚惩罚 .AddJsonOptions(options => { //忽略循环引用 options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore; //不使用驼峰样式的key options.SerializerSettings.ContractResolver = new DefaultContractResolver(); //设置时间格局 options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss"; })

.netcore 3.1 services.AddControllers() .AddJsonOptions(options => { //设置时间格局 options.JsonSerializerOptions.Converters.Add(new DateTimeJsonConverter("yyyy-MM-dd HH:mm:ss")); //设置bool获取格局 options.JsonSerializerOptions.Converters.Add(new BoolJsonConverter()); //不使用驼峰样式的key options.JsonSerializerOptions.PropertyNamingPolicy = null; //不使用驼峰样式的key options.JsonSerializerOptions.DictionaryKeyPolicy = null; //获取或设置要在转义字符串时使用的编码器 options.JsonSerializerOptions.Encoder = JavaScriptEncoder.UnsafeRelaxedJsonEscaping; }); bool型转换问题

.netcore 3.1中接收的json中不能将 "true"/"false"识别为boolean的True/False，，这也需要自界说Converter实现bool转换

namespace Kdniao.Core.Utility { public class BoolJsonConverter : JsonConverter<bool> { public override bool Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) { if (reader.TokenType == JsonTokenType.True || reader.TokenType == JsonTokenType.False) return reader.GetBoolean(); return bool.Parse(reader.GetString()); } public override void Write(Utf8JsonWriter writer, bool value, JsonSerializerOptions options) { writer.WriteBooleanValue(value); } } }

System.Text.Json 自界说Converter实现时间转换