设计模式之[构建者模式(Builder)]-C#

1 var director = new Director(; 2 var sanxingBuilder = new SanxingBuilder(; 3 director.Build(sanxingBuilder; 4 var sanxingComputer = sanxingBuilder.GetComputer(; 5 Console.WriteLine(sanxingComputer; 6 7 var dellBuilder = new DellBuilder(; 8 director.Build(dellBuilder; 9 var dellComputer = dellBuilder.GetComputer(; 10 Console.WriteLine(dellComputer; 11 12 //1、定义要构建的对象 电脑 13 public class Computer 14 { 15 public string Cup { get; set; } = string.Empty; 16 public string Memory { get; set; } = string.Empty; 17 public string Mainbord { get; set; } = string.Empty; 18 public string Screen { get; set; } = string.Empty; 19 20 public override string ToString( 21 { 22 return $"Cup:{Cup},Memory:{Memory},Mainbord:{Mainbord},Screen:{Screen}"; 23 } 24 } 25 26 //2、定义一个抽象构建器 27 public abstract class Builder 28 { 29 public abstract Builder BuildCpu(;//返回类型是自己（Builder），这样就支持链式调用 30 public abstract Builder BuildMemory(; 31 public abstract Builder BuildMainbord(; 32 public abstract Builder BuildScreen(; 33 34 public abstract Computer GetComputer(; 35 } 36 37 //3、实现构建起 三星 38 public class SanxingBuilder : Builder 39 { 40 private readonly Computer _computer = new Computer(; 41 42 public override Builder BuildCpu( 43 { 44 _computer.Cup = "三星 CUP"; 45 Console.WriteLine(_computer.Cup; 46 return this; 47 } 48 49 public override Builder BuildMainbord( 50 { 51 _computer.Mainbord = "三星 CUP"; 52 Console.WriteLine(_computer.Mainbord; 53 return this; 54 } 55 56 public override Builder BuildMemory( 57 { 58 _computer.Memory = "三星 Memory"; 59 Console.WriteLine(_computer.Memory; 60 return this; 61 } 62 63 public override Builder BuildScreen( 64 { 65 _computer.Screen = "三星 Screen"; 66 Console.WriteLine(_computer.Screen; 67 return this; 68 } 69 70 public override Computer GetComputer( 71 { 72 return _computer; 73 } 74 } 75 76 //3实现 构建者 dell 77 public class DellBuilder : Builder 78 { 79 private readonly Computer _computer = new Computer(; 80 public override Builder BuildCpu( 81 { 82 _computer.Cup = "戴尔 CUP"; 83 Console.WriteLine(_computer.Cup; 84 return this; 85 } 86 87 public override Builder BuildMainbord( 88 { 89 _computer.Mainbord = "戴尔 Mainbord"; 90 Console.WriteLine(_computer.Mainbord; 91 return this; 92 } 93 94 public override Builder BuildMemory( 95 { 96 _computer.Memory = "戴尔 Memory"; 97 Console.WriteLine(_computer.Memory; 98 return this; 99 } 100 101 public override Builder BuildScreen( 102 { 103 _computer.Screen = "戴尔 Screen"; 104 Console.WriteLine(_computer.Screen; 105 return this; 106 } 107 108 public override Computer GetComputer( 109 { 110 return _computer; 111 } 112 } 113 114 //4、导演角色、编排构建顺序 115 public class Director 116 { 117 public void Build(Builder builder 118 { 119 builder 120 .BuildCpu( 121 .BuildMainbord( 122 .BuildMemory( 123 .BuildScreen(; 124 } 125 }