信息脱敏

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;
        }


    }
}