策略模式,工厂模式,单例模式编写身份证的验证算法

  1 /// <summary>
  2     /// 策略模式
  3     /// </summary>
  4     public interface IidCheck
  5     {
  6         bool Check(string id);
  7     }
  8 
  9     public class Id18Check : IidCheck
 10     {
 11         public bool Check(string cid)
 12         {
 13             string[] aCity = new string[] { null, null, null, null, null, null, null, null, null, null, null, "北京", "天津", "河北", "山西", "内蒙古", null, null, null, null, null, "辽宁", "吉林", "黑龙江", null, null, null, null, null, null, null, "上海", "江苏", "浙江", "安微", "福建", "江西", "山东", null, null, null, "河南", "湖北", "湖南", "广东", "广西", "海南", null, null, null, "重庆", "四川", "贵州", "云南", "西藏", null, null, null, null, null, null, "陕西", "甘肃", "青海", "宁夏", "新疆", null, null, null, null, null, "台湾", null, null, null, null, null, null, null, null, null, "香港", "澳门", null, null, null, null, null, null, null, null, "国外" };
 14             double iSum = 0;
 15             System.Text.RegularExpressions.Regex rg = new System.Text.RegularExpressions.Regex(@"^\d{17}(\d|X|x)$");
 16             System.Text.RegularExpressions.Match mc = rg.Match(cid);
 17             if (!mc.Success)
 18             {
 19                 //Log.WriteLog("身份证验证失败：" + cid);
 20                 return false;
 21             }
 22             cid = cid.ToLower();
 23             cid = cid.Replace("x", "a");
 24             if (aCity[int.Parse(cid.Substring(0, 2))] == null)
 25             {
 26                 //Log.WriteLog("身份证验证失败：" + cid);
 27                 //非法地区
 28                 return false;
 29             }
 30             try
 31             {
 32                 DateTime.Parse(cid.Substring(6, 4) + "-" + cid.Substring(10, 2) + "-" + cid.Substring(12, 2));
 33             }
 34             catch
 35             {
 36                 //Log.WriteLog("身份证验证失败：" + cid);
 37                 return false;//非法生日
 38             }
 39             for (int i = 17; i > 0; i--)
 40             {
 41                 int w = (int)(System.Math.Pow(2, i) % 11);
 42                 int a = int.Parse(cid[17 - i].ToString(), System.Globalization.NumberStyles.HexNumber);
 43 
 44                 iSum += w * a;
 45             }
 46 
 47             Dictionary<string, string> dic = new Dictionary<string, string>();
 48             dic.Add("0", "1");
 49             dic.Add("1", "0");
 50             dic.Add("2", "X");
 51             dic.Add("3", "9");
 52             dic.Add("4", "8");
 53             dic.Add("5", "7");
 54             dic.Add("6", "6");
 55             dic.Add("7", "5");
 56             dic.Add("8", "4");
 57             dic.Add("9", "3");
 58             dic.Add("10", "2");
 59 
 60             if (dic[(iSum % 11).ToString()] == cid.Substring(cid.Length - 1, 1))
 61             {
 62                 return true;
 63             }
 64             return false;
 65         }
 66     }
 67 
 68     public class Id15Check : IidCheck
 69     {
 70         public bool Check(string cid)
 71         {
 72             string[] aCity15 = new string[] { null, null, null, null, null, null, null, null, null, null, null, "北京", "天津", "河北", "山西", "内蒙古", null, null, null, null, null, "辽宁", "吉林", "黑龙江", null, null, null, null, null, null, null, "上海", "江苏", "浙江", "安微", "福建", "江西", "山东", null, null, null, "河南", "湖北", "湖南", "广东", "广西", "海南", null, null, null, "重庆", "四川", "贵州", "云南", "西藏", null, null, null, null, null, null, "陕西", "甘肃", "青海", "宁夏", "新疆", null, null, null, null, null, "台湾", null, null, null, null, null, null, null, null, null, "香港", "澳门", null, null, null, null, null, null, null, null, "国外" };
 73 
 74             System.Text.RegularExpressions.Regex rg15 = new System.Text.RegularExpressions.Regex(@"^\d{15}$");
 75             System.Text.RegularExpressions.Match mc15 = rg15.Match(cid);
 76             if (!mc15.Success)
 77             {
 78                 return false;
 79             }
 80             cid = cid.ToLower();
 81             cid = cid.Replace("x", "a");
 82             if (int.Parse(cid.Substring(0, 2)) > aCity15.Length)
 83             {
 84                 //Log.WriteLog("身份证验证失败：" + cid);
 85                 return false;//非法地区
 86             }
 87             if (aCity15[int.Parse(cid.Substring(0, 2))] == null)
 88             {
 89                 //Log.WriteLog("身份证验证失败：" + cid);
 90                 return false;//非法地区
 91             }
 92             try
 93             {
 94                 DateTime.Parse("19" + cid.Substring(6, 2) + "-" + cid.Substring(8, 2) + "-" + cid.Substring(10, 2));
 95             }
 96             catch
 97             {
 98                 //Log.WriteLog("身份证验证失败：" + cid);
 99                 return false;//非法生日
100             }
101             return true;
102         }
103     }
104 
105     /// <summary>
106     /// 工厂模式
107     /// </summary>
108     public class IdCheckFactory
109     {
110         /// <summary>
111         /// 单例模式
112         /// </summary>
113         public static readonly IdCheckFactory Instance = new IdCheckFactory();
114 
115         public bool Check(string id)
116         {
117             if (string.IsNullOrEmpty(id))
118             {
119                 return false;
120             }
121 
122             switch (id.Length)
123             {
124                 case 15:
125                     IidCheck model = new Id15Check();
126                     return model.Check(id);
127                 case 18:
128                     IidCheck model18 = new Id18Check();
129                     return model18.Check(id);
130                 default:
131                     return false;
132             }
133         }
134     }


调用控制台代码：

 1  /// <summary>
 2     /// client端
 3     /// </summary>
 4     class Program
 5     {
 6         static void Main(string[] args)
 7         {
 8             Console.WriteLine("请输入要验证的身份证号");
 9             string id = Console.ReadLine();
10             while (id != "#")
11             {
12                 bool succ = IdCheckFactory.Instance.Check(id);
13 
14                 if (succ)
15                 {
16                     Console.WriteLine("身份证输入正确");
17                 }
18                 else
19                 {
20                     Console.WriteLine("身份证输入错误");
21                 }
22                 Console.WriteLine("请输入要验证的身份证号");
23                 id = Console.ReadLine();
24             }
25 
26         }
27     }