设计模式》》门面模式 适配器模式 区别

// 复杂子系统
class CPU {start() { console.log("CPU启动"); }
}
class Memory {load() { console.log("内存加载"); }
}
class HardDrive {read() { console.log("硬盘读取"); }
}// 门面
class ComputerFacade {constructor() {this.cpu = new CPU();this.memory = new Memory();this.hardDrive = new HardDrive();}start() {this.cpu.start();this.memory.load();this.hardDrive.read();console.log("电脑启动完成");}
}// 客户端代码
const computer = new ComputerFacade();
computer.start(); // 只需调用一个简单方法

// 复杂子系统
public class CPU
{public void Start() => Console.WriteLine("CPU启动");
}public class Memory
{public void Load() => Console.WriteLine("内存加载");
}public class HardDrive
{public void Read() => Console.WriteLine("硬盘读取");
}// 门面类
public class ComputerFacade
{private readonly CPU _cpu;private readonly Memory _memory;private readonly HardDrive _hardDrive;public ComputerFacade(){_cpu = new CPU();_memory = new Memory();_hardDrive = new HardDrive();}public void Start(){_cpu.Start();_memory.Load();_hardDrive.Read();Console.WriteLine("电脑启动完成");}
}// 使用
var computer = new ComputerFacade();
computer.Start();

// 不兼容的旧接口
public interface IOldCalculator
{int Calculate(int a, int b, string operation);
}public class OldCalculator : IOldCalculator
{public int Calculate(int a, int b, string operation){return operation switch{"add" => a + b,"sub" => a - b,_ => throw new NotSupportedException()};}
}// 新接口(期望的)
public interface INewCalculator
{int Add(int a, int b);int Subtract(int a, int b);
}public class NewCalculator : INewCalculator
{public int Add(int a, int b) => a + b;public int Subtract(int a, int b) => a - b;
}// 适配器
public class CalculatorAdapter : IOldCalculator
{private readonly INewCalculator _newCalculator;public CalculatorAdapter(INewCalculator newCalculator){_newCalculator = newCalculator;}public int Calculate(int a, int b, string operation){return operation switch{"add" => _newCalculator.Add(a, b),"sub" => _newCalculator.Subtract(a, b),_ => throw new NotSupportedException()};}
}// 使用
IOldCalculator oldCalc = new OldCalculator();
Console.WriteLine(oldCalc.Calculate(10, 5, "add")); // 15var adapter = new CalculatorAdapter(new NewCalculator());
Console.WriteLine(adapter.Calculate(10, 5, "add")); // 15 (使用新实现但保持旧接口)