查找和替换在净

Question

JSON响应字符串我收到以下类型的JSON从Web服务响应：

{"students":[{"studentID":"123456789","section":"S","RefId":"  ","pastScore":"99952","currentScore":"99952","inquiryAllowed":true},{"studentID":"223456789","section":"R","RefId":"  ,"pastScore":"152","currentScore":"952","inquiryAllowed":true},{"studentID":"323456789","section":"T","RefId":"  ,"pastScore":"4582","currentScore":"5952","inquiryAllowed":true},],"schoolName":"WatsonPrimarySchool"} 

我需要屏蔽studentID，pastScore，currentScore和schoolName。输出将如下所示：

{"students":[{"studentID":"$$$$$$$$","section":"S","RefId":"  ","pastScore":"$$$$$","currentScore":"$$$$$","inquiryAllowed":true},{"studentID":"$$$$$$$$$","section":"R","RefId":"  ,"pastScore":"$$$","currentScore":"$$$","inquiryAllowed":true},{"studentID":"$$$$$$$$$","section":"T","RefId":"  ,"pastScore":"$$$$","currentScore":"$$$$","inquiryAllowed":true},],"schoolName":"$$$$$$$$$$$$$$$$$$$"} 

schoolName只会发生一次，其余的可以是多个。

我试过使用StringBuilder，但由于值的动态性质，它没有成功。有人可以建议一个正则表达式解决方案吗？

Answer 1

使用JSON.Net到JSON转换为一类，面膜要屏蔽性能，并再次使用JSON.Net生成JSON的屏蔽值

您可以使用JSON任何其他库同时，JSON.Net只是使用最简单的，我知道 - 检查许可条件也

Answer 2

您可以使用Json.Net和LINQ

var propsToMask = new HashSet<string>(new[] { "studentID", "pastScore", "currentScore", "schoolName" }); 
var jObj = JObject.Parse(json); 

foreach(var p in jObj.Descendants() 
        .OfType<JProperty>() 
        .Where(p => propsToMask.Contains(p.Name))) 
{ 
    p.Value = "$$$$$$"; 
} 

var newJsonStr = jObj.ToString(); 

Answer 3

@DGibbs是一个很好的提示。 但是，如果你决定去正则表达式：

Regex.Replace(jsonInput, "((studentID|pastScore|currentScore|currentScore)\":\")(.+?)\"", "$1\$\$\$\"") 

Answer 4

的解决方案：

1. 将字符串到对象，然后将其转换成任何你想要的。
2. 做它直接使用StringBuilder

第一个解决方案，采用JSON.NET：这里是步骤：

1. 你应该重新检查你的JSON，消除不需要的空间。如果您的JSON包含它们，如'studentID'，则无法正确解析它。下面是我做的：

   { 
   'students' : [{ 
        'studentID' : '123456789', 
        'section' : 'S', 
        'RefId' : '  ', 
        'pastScore' : '99952', 
        'currentScore' : '99952', 
        'inquiryAllowed' : true 
       }, { 
        'studentID' : '223456789', 
        'section' : 'R', 
        'RefId' : '  ', 
        'pastScore' : '152', 
        'currentScore' : '952', 
        'inquiryAllowed' : true 
       }, { 
        'studentID' : '323456789 ', 
        'section' : 'T', 
        'RefId' : '', 
        'pastScore' : '4582', 
        'currentScore' : '5952', 
        'inquiryAllowed' : true 
       } 
   ], 
   'schoolName' : 'WatsonPrimarySchool' 
   } 
   

2. 使用Nuget Packages到Json.NET库添加到您的项目。

3. 创建2个类来保存数据：

Student.cs

public class Student 
{ 
    public string StudentId { get; set; } 
    public string Section { get; set; } 
    public string RefId { get; set; } 
    public string PastScore { get; set; } 
    public string CurrentScore { get; set; } 
    public bool InquiryAllowed { get; set; } 
} 

School.cs

public class School 
{ 
    public List<Student> Students { get; set; } 
    public string SchoolName { get; set; } 
} 

主程序。

string json = "Your JSON string"; 

    // Convert JSON string to object 
    var school = JsonConvert.DeserializeObject<School>(json); 

    // Mask it as you want 
    foreach (var student in school.Students) 
    { 
     student.StudentId = "$$$$$$$$"; 
     student.PastScore = "$$$$$$$$"; 
     student.CurrentScore = "$$$$$$$$"; 
    } 
    school.SchoolName = "$$$$$$$$"; 

    // Convert object back to string 
    string masked = JsonConvert.SerializeObject(school); 

    // Show it 
    Console.WriteLine(masked); 

    Console.ReadLine(); 

解决方法二：使用StringBuilder

首先，你必须检查您的JSON字符串，以确保它有一个正确的格式。我在上面的第一步中做了。出于测试原因，我将所有双引号替换为单引号。

这是程序，使用StringBuilder。我在那里发表评论。如果您不明白，请随时提问。

static void Main(string[] args) 
{ 
    string json = "{'students':[{'studentID':'123456789','section':'S','RefId':'  ','pastScore':'99952','currentScore':'99952','inquiryAllowed':true},{'studentID':'223456789','section':'R','RefId':'  ','pastScore':'152','currentScore':'952','inquiryAllowed':true},{'studentID':'323456789 ','section':'T','RefId':'','pastScore':'4582','currentScore':'5952','inquiryAllowed':true}],'schoolName':'WatsonPrimarySchool'}"; 
    var builder = new StringBuilder(); 

    // The cursor 
    int start = 0; 

    while (true) 
    { 
     bool notFoundStudentId = false; 
     bool notFoundPastScore = false; 
     bool notFoundCurrentScore = false; 

     // Student ID 
     int index = json.IndexOf("'studentID'", start, StringComparison.Ordinal); 
     if (index > 0) 
     { 
      // Append everything from the starting point to the beginning of 'studentID' 
      builder.Append(json, start, index - start); 

      // Mask it 
      builder.Append("'studentID':'$$$$$$'"); 

      // Move the starting point to the comma after 'studentID' value 
      start = json.IndexOf(',', index); 
     } 
     else 
     { 
      notFoundStudentId = true; 
     } 

     // Past score 
     index = json.IndexOf("'pastScore'", start, StringComparison.Ordinal); 
     if (index > 0) 
     { 
      builder.Append(json, start, index - start); 
      builder.Append("'pastScore':'$$$$$$'"); 
      start = json.IndexOf(',', index); 
     } 
     else 
     { 
      notFoundPastScore = true; 
     } 

     // Current Score 
     index = json.IndexOf("'currentScore'", start, StringComparison.Ordinal); 
     if (index > 0) 
     { 
      builder.Append(json, start, index - start); 
      builder.Append("'currentScore':'$$$$$$'"); 
      start = json.IndexOf(',', index); 
     } 
     else 
     { 
      notFoundCurrentScore = true; 
     } 

     // Found nothing? It's time for schoolName 
     if (notFoundStudentId && notFoundPastScore && notFoundCurrentScore) 
     { 
      index = json.IndexOf("'schoolName'", start, StringComparison.Ordinal); 
      builder.Append(json, start, index - start); 
      builder.Append("'schoolName':'$$$$$$'}"); 

      // End the loop 
      break; 
     } 
    } 

    // Display 
    Console.WriteLine(builder.ToString()); 
    Console.ReadLine(); 
}