使用Json.NET进行序列化时，如何应用通用规则重新映射所有属性名称？

使用Json.NET进行序列化时，如何应用通用规则重新映射所有属性名称？

假设您正在使用Json.NET
9.0.1或更高版本，则可以使用custom来完成

NamingStrategy

。举例来说，这里是基于一个

SnakeCaseNamingStrategy

和

StringUtils.ToSnakeCase()

詹姆斯·牛顿王：

public class CustomNamingStrategy : NamingStrategy{    public CustomNamingStrategy(bool processDictionaryKeys, bool overrideSpecifiedNames)    {        ProcessDictionaryKeys = processDictionaryKeys;        OverrideSpecifiedNames = overrideSpecifiedNames;    }    public CustomNamingStrategy(bool processDictionaryKeys, bool overrideSpecifiedNames, bool processExtensionDataNames)        : this(processDictionaryKeys, overrideSpecifiedNames)    {        ProcessExtensionDataNames = processExtensionDataNames;    }    public CustomNamingStrategy()    {    }    protected override string ResolvePropertyName(string name)    {        return SpaceWords(name);    }    enum WordState    {        Start,        Lower,        Upper,        NewWord    }    static string SpaceWords(string s)    {        // Adapted from StringUtils.ToSnakeCase()        // https://github.com/JamesNK/Newtonsoft.Json/blob/master/Src/Newtonsoft.Json/Utilities/StringUtils.cs#L191        //         // Copyright (c) 2007 James Newton-King        //        // Permission is hereby granted, free of charge, to any person        // obtaining a copy of this software and associated documentation        // files (the "Software"), to deal in the Software without        // restriction, including without limitation the rights to use,        // copy, modify, merge, publish, distribute, sublicense, and/or sell        // copies of the Software, and to permit persons to whom the        // Software is furnished to do so, subject to the following        // conditions:        //        // The above copyright notice and this permission notice shall be        // included in all copies or substantial portions of the Software.        //        // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES        // OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND        // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT        // HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,        // WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING        // FROM, OUT OF OR IN ConNECTION WITH THE SOFTWARE OR THE USE OR        // OTHER DEALINGS IN THE SOFTWARE.        char wordBreakChar = ' ';        if (string.IsNullOrEmpty(s))        { return s;        }        StringBuilder sb = new StringBuilder();        WordState state = WordState.Start;        for (int i = 0; i < s.Length; i++)        { if (s[i] == ' ') {     if (state != WordState.Start)     {         state = WordState.NewWord;     } } else if (char.IsUpper(s[i])) {     switch (state)     {         case WordState.Upper:  bool hasNext = (i + 1 < s.Length);  if (i > 0 && hasNext)  {      char nextChar = s[i + 1];      if (!char.IsUpper(nextChar) && nextChar != ' ')      {          sb.Append(wordBreakChar);      }  }  break;         case WordState.Lower:         case WordState.NewWord:  sb.Append(wordBreakChar);  break;     }     sb.Append(s[i]);     state = WordState.Upper; } else if (s[i] == wordBreakChar) {     sb.Append(wordBreakChar);     state = WordState.Start; } else {     if (state == WordState.NewWord)     {         sb.Append(wordBreakChar);     }     sb.Append(s[i]);     state = WordState.Lower; }        }        sb.Replace("Number", "#");        return sb.ToString();    }}

然后可以将其应用于您的类型，如下所示：

[JsonObject(NamingStrategyType = typeof(CustomNamingStrategy))]public class RootObject{    public string JobType { get; set; }    public string JobNumber { get; set; }    public int JobItemCount { get; set; }    public string ISOCode { get; set; }    public string SourceXML { get; set; }}

并且生成的JSON将如下所示：

{  "Job Type": "job type",  "Job #": "01010101",  "Job Item Count": 3,  "ISO Code": "ISO 9000",  "Source XML": "c:temp.xml"}

笔记：

• 如果要将策略应用于已通过指定属性名称的属性

  JsonPropertyAttribute.PropertyName

  ，请设置

  NamingStrategy.OverrideSpecifiedNames == true

  。

• 要将命名策略应用于所有类型而不是在每个对象上进行设置，可以在中设置命名策略

  DefaultContractResolver.NamingStrategy

  ，然后在中设置合同解析器

  JsonSerializerSettings.ContractResolver

  。

• 命名策略从c＃属性名称映射到JSON属性名称，反之亦然。因此，您需要插入空格，而不是“拔出”并将“ Number”替换为“＃”。然后由合同解析器缓存该映射，并在反序列化过程中进行反向查找。