信息脱敏

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using System; using System.Collections.Generic; using System.Linq; using System.Text;   namespace MEAS.Common {     public class DesensitizationHelper     {         //定义一个用于保存静态变量的实例         private static DesensitizationHelper instance = null;         //定义一个保证线程同步的标识         private static readonly object locker = new object();         //构造函数为私有，使外界不能创建该类的实例         private DesensitizationHelper() { }         public static DesensitizationHelper Instance         {             get             {                 if (instance == null)                 {                     lock (locker)                     {                         if (instance == null) instance = new DesensitizationHelper();                     }                 }                 return instance;             }         }             /// <summary>         /// 姓名敏感处理         /// </summary>         /// <param name="fullName">姓名</param>         /// <returns>脱敏后的姓名</returns>         public string SetSensitiveName(string fullName)         {             if (string.IsNullOrEmpty(fullName)) return string.Empty;             string name = string.Empty;             try             {                 string familyName = fullName.Substring(0, 1);                 string end = fullName.Substring(fullName.Length - 1, 1);                   //长度为2                 if (fullName.Length <= 2) name = familyName + "*";                 //长度大于2                 else if (fullName.Length >= 3)                 {                     name = familyName.PadRight(fullName.Length - 1, '*') + end;                 }             }             catch             {                 return name;             }             return name;         }           /// <summary>         /// 身份证脱敏         /// </summary>         /// <param name="idCardNo">身份证号</param>         /// <returns>脱敏后的身份证号</returns>         public string SetSensitiveIdCardNo(string idCardNo)         {             if (string.IsNullOrEmpty(idCardNo)                 || (idCardNo.Length != 15 && idCardNo.Length != 18)) return idCardNo;             string card = string.Empty;               try             {                 string begin = idCardNo.Substring(0, 6);                 string middle = idCardNo.Substring(6, 8);                 string end = idCardNo.Substring(14, idCardNo.Length - 14);                   card = begin + "********" + end;             }             catch             {                 return card;             }             return card;         }         } }