1.定義：

定義一個用于創建對象的接口，讓子類決定實例化哪一個類。Factory Method使得一個類的實例化延遲到子類。 2.實現代碼如下： /// <summary>/// 工廠方法/// </summary>public abstract class Factory{public abstract Compute GetCompute();}public class AddFactory : Factory{public override Compute GetCompute(){return new AddCompute();}}public class JianFaFactory : Factory{public override Compute GetCompute(){return new SubCompute();}}public class ChengFaFactory : Factory{public override Compute GetCompute(){return new ChengFaCompute();}}public class ChuFaFactory : Factory{public override Compute GetCompute(){return new ChuFaCompute();}}/// <summary>/// 計算類/// </summary>public abstract class Compute{protected int number1;public int Number1{get { return number1; }set { number1 = value; }}protected int number2;public int Number2{get { return number2; }set { number2 = value; }}public abstract int GetResult();}/// <summary>/// 加法/// </summary>public class AddCompute : Compute{public override int GetResult(){return number1 + number2;} }/// <summary>/// 減法/// </summary>public class SubCompute : Compute{public override int GetResult(){return number1 - number2;}}/// <summary>/// 乘法/// </summary>public class ChengFaCompute : Compute{public override int GetResult(){return number1 * number2;}}/// <summary>/// 除法/// </summary>public class ChuFaCompute : Compute{public override int GetResult(){return number1 / number2;}}
? static void Main(string[] args){int number1 = 1;int number2 = 2;Factory factory = null;string operate = "+";switch (operate){case "+":factory = new AddFactory();break;case "-":factory = new JianFaFactory();break;case "*":factory = new ChengFaFactory();break;case "/":factory = new ChuFaFactory();break;default:break;}Compute compute = factory.GetCompute();compute.Number1 = number1;compute.Number2 = number2;Console.WriteLine(compute.GetResult());Console.ReadKey();}

?

?

3.和簡單工廠不同的地方是

(1)簡單工廠是由switch直接創建具體的產品對象，而工廠方法是swith延遲創建具體的產品對象，先創建相應的工廠，在延遲創建具體的產品對象

(2)簡單工廠只能創建一個工廠，工廠方法可以創建多個工廠

?

4.工廠方法的好處：

(1)用工廠方法在一個類的內部創建對象通常比直接創建對象更靈活。

(2)Factory Method模式通過面向對象的手法，將所要創建的具體對象的創建工作延遲到了子類，從而提供了一種擴展的策略，較好的解決了這種緊耦合的關系。

總結

以上是生活随笔為你收集整理的3.Factory Method 工厂方法模式（创建型模式)的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。