first commit

Infrastructure/Converter/StringConverter.cs

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+using System;
+using System.Buffers;
+using System.Linq;
+using System.Text;
+using System.Text.Json;
+
+namespace Infrastructure.Converter
+{
+    /// <summary>
+    /// Json任何类型读取到字符串属性
+    /// 因为 System.Text.Json 必须严格遵守类型一致，当非字符串读取到字符属性时报错：
+    /// The JSON value could not be converted to System.String.
+    /// </summary>
+    public class StringConverter : System.Text.Json.Serialization.JsonConverter<string>
+    {
+        public override string Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            if (reader.TokenType == JsonTokenType.String)
+            {
+                return reader.GetString();
+            }
+            else
+            {
+                //非字符类型，返回原生内容
+                return GetRawPropertyValue(reader);
+            }
+
+            throw new JsonException();
+        }
+
+        public override void Write(Utf8JsonWriter writer, string value, JsonSerializerOptions options)
+        {
+            writer.WriteStringValue(value);
+        }
+        /// <summary>
+        /// 非字符类型，返回原生内容
+        /// </summary>
+        /// <param name="jsonReader"></param>
+        /// <returns></returns>
+        private static string GetRawPropertyValue(Utf8JsonReader jsonReader)
+        {
+            ReadOnlySpan<byte> utf8Bytes = jsonReader.HasValueSequence ?
+            jsonReader.ValueSequence.ToArray() :
+            jsonReader.ValueSpan;
+            return Encoding.UTF8.GetString(utf8Bytes);
+        }
+    }
+}