工厂模式
简单工厂模式:通过专门定义一个类来负责创建其他类的实例，被创建的实例通常都具有共同的父类。
场景：公司的一个彩票红包推广活动项目，需要随机生成彩票号码，目前有双色球和大乐透，品种后期可能会新增。
彩票基础类：
1 public abstract class LotBase 2 { 3 /// <summary> 4 /// 随机数生成器 5 /// </summary> 6 public static Random rand = new Random(); 7 //间隔符号 8 private string space = "-"; 9 10 /// <summary> 11 /// 获取红球号码 12 /// </summary> 13 /// <returns></returns> 14 protected abstract string GetRedche(); 15 /// <summary> 16 /// 获取篮球号码 17 /// </summary> 18 /// <returns></returns> 19 protected abstract string GetBlueche(); 20 /// <summary> 21 /// 22 /// </summary> 23 /// <returns></returns> 24 protected string ToLotChe(List<string> lotList) 25 { 26 StringBuilder lotChe = new StringBuilder(); 27 lotList.Sort(); 28 foreach (string item in lotList) 29 { 30 lotChe.Append(item); 31 lotChe.Append(" "); 32 } 33 lotChe.Remove(lotChe.Length - 1, 1); 34 return lotChe.ToString(); 35 } 36 /// <summary> 37 /// 获取彩票号码 38 /// </summary> 39 /// <returns></returns> 40 public string GetLotChe() 41 { 42 return string.Format("{0}{1}{2}", GetRedche(), space, GetBlueche()); 43 } 44 }
双色球:
1 public class LotSSQ : LotBase 2 { 3 /// <summary> 4 /// 双色球红球6个号码 5 /// </summary> 6 /// <returns></returns> 7 protected override string GetRedche() 8 { 9 int index = 0; 10 List<string> redList = new List<string> { "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33" }; 11 List<string> redChe = new List<string>(); 12 for (int i = 0; i < 6; i++) 13 { 14 index = rand.Next(redList.Count - 1); 15 redChe.Add(redList[index]); 16 redList.RemoveAt(index); 17 } 18 return ToLotChe(redChe); 19 } 20 /// <summary> 21 /// 双色球篮球一个 22 /// </summary> 23 /// <returns></returns> 24 protected override string GetBlueche() 25 { 26 string[] blueList = { "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15", "16" }; 27 return blueList[rand.Next(15)]; 28 } 29 }
大乐透:
1 public class LotDLT : LotBase 2 { 3 /// <summary> 4 /// 大乐透红球5个号码 5 /// </summary> 6 /// <returns></returns> 7 protected override string GetRedche() 8 { 9 int index = 0; 10 List<string> redList = new List<string> { "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "30", "31", "32", "33", "34", "35" }; 11 List<string> redChe = new List<string>(); 12 for (int i = 0; i < 5; i++) 13 { 14 index = rand.Next(redList.Count - 1); 15 redChe.Add(redList[index]); 16 redList.RemoveAt(index); 17 } 18 return ToLotChe(redChe); 19 } 20 /// <summary> 21 /// 大乐透篮球2个号码 22 /// </summary> 23 /// <returns></returns> 24 protected override string GetBlueche() 25 { 26 int index = 0; 27 List<string> blueList = new List<string> { "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12" }; 28 List<string> blueChe = new List<string>(); 29 for (int i = 0; i < 2; i++) 30 { 31 index = rand.Next(blueList.Count - 1); 32 blueChe.Add(blueList[index]); 33 blueList.RemoveAt(index); 34 } 35 return ToLotChe(blueChe); 36 } 37 }
彩票工厂类:
1 public class LotFactory 2 { 3 public static LotBase GetLot(string lotcode) 4 { 5 LotBase lotCheBase = null; 6 switch (lotcode) 7 { 8 //双色球 9 case "SSQ": 10 lotCheBase = new LotSSQ(); 11 break; 12 //大乐透 13 case "DLT": 14 lotCheBase = new LotDLT(); 15 break; 16 } 17 return lotCheBase; 18 } 19 }
