Newtonsoft.Json and System.Text.Json difference
在 Newtonsoft.Json中可以使用例如
.AddJsonOptions(options =>
{
options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss";
})
Provided receiving / serialization time format, but .net core 3.1 is not built in System.Text.Json conversion mode, which requires time to achieve a custom Converter converts
official address GitHub
Custom 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));
}
}
There are several enumerated types JsonTokenType
/// <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 difference in Newtonsoft.Json configuration with System.Text.Json
.netcore 2.1
services
//全局配置Json序列化处理
.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();
//设置时间格式
options.SerializerSettings.DateFormatString = "yyyy-MM-dd HH:mm:ss";
})
.netcore 3.1
services.AddControllers()
.AddJsonOptions(options =>
{
//设置时间格式
options.JsonSerializerOptions.Converters.Add(new DateTimeJsonConverter("yyyy-MM-dd HH:mm:ss"));
//设置bool获取格式
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 type conversion issues
.netcore 3.1 json received can not be "true"/"false"
recognized as a boolean True / False, which also requires a custom implemented Converter converts bool
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);
}
}
}