Java的设计模式-抽象工厂

抽象工厂模式是在工厂模式上的进一步扩展：工厂模式可以通过传递给工厂类一个字符串不同创建不同的实例抽象工厂是在此基础上在加一层通过工厂来创建工厂

代码如下：

color.java 接口 shape.java 接口他们的实现类

package testDesignDemo.abstractfactory;

public interface Color {
   public String  getColor();
}

package testDesignDemo.abstractfactory;

public class ColorBlue implements Color {

	@Override
	public String getColor() {
		return "blue";
	}

}

package testDesignDemo.abstractfactory;

public interface Shape {
    public String getShape();
}

package testDesignDemo.abstractfactory;

public class Roundness implements Shape {

	@Override
	public String getShape() {
		return "圆形";
	}

}

抽象工厂：

package testDesignDemo.abstractfactory;

public abstract class AbstractFactory {
      public abstract Color getColor(String color);
      public abstract Shape getShape(String shape);
}

各自的实现工厂：

package testDesignDemo.abstractfactory;

public class ShapeFactory extends AbstractFactory{
      public Shape getShape(String shape){
    	  if(shape.equalsIgnoreCase("Square")){
    		  return new Square();
    	  }
    	  if(shape.equalsIgnoreCase("Roundness")){
    		  return new Roundness();
    	  }
    	  return null;
      }

	@Override
	public Color getColor(String color) {
		// TODO Auto-generated method stub
		return null;
	}
}

package testDesignDemo.abstractfactory;

public class ColorFactory extends AbstractFactory {
      public Color getColor(String color){
    	  if(color.equalsIgnoreCase("red")){
    		  return new ColorRed();
    	  }
    	  if(color.equalsIgnoreCase("blue")){
    		  return new ColorBlue();
    	  }
    	  return null;
      }

	@Override
	public Shape getShape(String shape) {
		// TODO Auto-generated method stub
		return null;
	}
}

最后是产品工厂

package testDesignDemo.abstractfactory;

public class FactoryProducer {
     public static AbstractFactory getProducer(String producer){
    	 if(producer.equalsIgnoreCase("red")){
    		 return new ColorFactory();
    	 }
    	 return null;
     }
}

然后你可以通过产品工厂来创建不同的颜色和形状你也可以同时创建两者（需要加一个工厂）

Java的设计模式-抽象工厂

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