88 lines
3.9 KiB
C#
88 lines
3.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text.Json;
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using System.Text.Json.Serialization;
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namespace Infrastructure.Converter
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{
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public class JsonConverterUtil
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{
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/// <summary>
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/// 你提供的转换器是针对单个 DateTime 或 DateTime? 的，而日期数组是一个集合类型（如 DateTime[] 或 List<DateTime>）。JSON 转换器需要明确知道如何处理集合中的每个元素。
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/// </summary>
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public class DateTimeNullConverter : JsonConverter<DateTime?>
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{
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//该方法用于将 JSON 字符串反序列化为 DateTime? 类型的值。
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public override DateTime? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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=> string.IsNullOrEmpty(reader.GetString()) ? default : ParseDateTime(reader.GetString());
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//方法用于将 DateTime? 类型的值序列化为 JSON 字符串
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public override void Write(Utf8JsonWriter writer, DateTime? value, JsonSerializerOptions options)
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=> writer.WriteStringValue(value?.ToLocalTime().ToString("yyyy-MM-dd HH:mm:ss"));
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}
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public class DateTimeConverter : JsonConverter<DateTime>
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{
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public override DateTime Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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{
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var dateTime = ParseDateTime(reader.GetString());
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return dateTime == null ? DateTime.MinValue : dateTime.Value;
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}
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public override void Write(Utf8JsonWriter writer, DateTime value, JsonSerializerOptions options)
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=> writer.WriteStringValue(value.ToLocalTime().ToString("yyyy-MM-dd HH:mm:ss"));
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}
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public static DateTime? ParseDateTime(string dateStr)
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{
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if (System.Text.RegularExpressions.Regex.IsMatch(dateStr, @"^\d{4}[/-]") && DateTime.TryParse(dateStr, null, System.Globalization.DateTimeStyles.AssumeLocal, out var dateVal))
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return dateVal.ToLocalTime();
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return null;
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}
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//******************************DOAN JSON 转换器处理日期数组****************************************
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public class DateTimeArrayConverter : JsonConverter<IEnumerable<DateTime>>
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{
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public override IEnumerable<DateTime> Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
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{
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if (reader.TokenType == JsonTokenType.StartArray)
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{
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var list = new List<DateTime>();
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while (reader.Read() && reader.TokenType != JsonTokenType.EndArray)
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{
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if (reader.TokenType == JsonTokenType.String)
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{
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var dateTime = ParseDateTime(reader.GetString());
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if (dateTime != null)
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{
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list.Add(dateTime.Value.ToLocalTime()); // 将UTC时间转为本地时间
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}
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}
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}
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return list;
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}
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throw new JsonException();
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}
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public override void Write(Utf8JsonWriter writer, IEnumerable<DateTime> value, JsonSerializerOptions options)
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{
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writer.WriteStartArray();
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foreach (var date in value)
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{
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writer.WriteStringValue(date.ToLocalTime().ToString("yyyy-MM-dd HH:mm:ss"));
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}
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writer.WriteEndArray();
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}
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private static DateTime? ParseDateTime(string dateStr)
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{
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if (!string.IsNullOrEmpty(dateStr) && DateTime.TryParse(dateStr, out var dateVal))
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{
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return dateVal; // 假设输入的已经是UTC时间
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}
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return null;
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}
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}
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}
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}
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