简单工厂设计模式

最新推荐文章于 2025-05-26 21:02:41 发布

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最新推荐文章于 2025-05-26 21:02:41 发布

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本文链接：https://blog.youkuaiyun.com/weixin_44868686/article/details/90740563

博客围绕简单工厂设计模式展开，以计算器工厂模板为例，介绍了工厂模板、生产的工厂、工厂可生产的内容，包括加、减、乘、除运算，还提及了测试类，并给出以除法为例的测试结果。

简单工厂设计模式

1.工厂模板:以计算器工厂模板为例

package com.design.factory;

public interface IProduction {
	public float caculate(float n1, float n2);
}

2.生产的工厂

package com.design.factory;

public class SimpleFactory {
	public SimpleFactory() {

	}

	public IProduction createProduction(String s) {
		switch (s) {
		case "+":
			return (IProduction) new AddCaculator();
		case "-":
			return (IProduction) new SubCaculator();
		case "*":
			return (IProduction) new MulCaculator();
		case "/":
			return (IProduction) new DivCaculator();
		default:
			break;
		}
		return null;

	}

}

3.工厂中可以生产的内容
（1）加法

package com.design.factory;

public class AddCaculator implements IProduction{

	@Override
	public float caculate(float n1, float n2) {
		
		return n1+n2;
	}
}

（2）减法

package com.design.factory;

public class SubCaculator implements IProduction{

	@Override
	public float caculate(float n1, float n2) {
		return n1-n2;
	}

}

（3）乘法

package com.design.factory;

public class MulCaculator implements IProduction{

	@Override
	public float caculate(float n1, float n2) {
		return n1*n2;
	}

}

(4)除法

package com.design.factory;

public class DivCaculator implements IProduction{

	@Override
	public float caculate(float n1, float n2) {
		return n1/n2;
	}

}

4.测试类

package com.design.factory;

public class TestMain {
	public static void main(String[] args) {
		IProduction  p=new SimpleFactory().createProduction("/");
		System.out.println(p.caculate(33f, 2.5f));
	}
}