简单工厂模式

 1、定义一个接口用来同统一类型

package com.factory;

public interface Car {
	public void run();
}

具体需要生成的产品 

package com.factory;

public class Aodi implements Car {

	@Override
	public void run() {
		System.out.println("奥迪在跑！");
	}

}

package com.factory;

public class Baoma implements Car {
	@Override
	public void run() {
		System.out.println("宝马再跑！");
	}
}

工厂

package com.factory;

public class EasyFactory {
	
	public EasyFactory() {
	}
	public Car createCar(String type){
		if("宝马".equals(type)){
			return new Baoma();
		}
		if("奥迪".equals(type)){
			return new Aodi();
		}
		return null ;
	}
	
}

 客户需要什么产品

package com.factory;

public class Client {
	
	
	public static void main(String[] args) {
		EasyFactory easyFactory = new EasyFactory();
		Car car = easyFactory.createCar("宝马") ;
		Car aodi = easyFactory.createCar("奥迪");
		car.run();
		aodi.run();
	}
}