设计模式--未完

工厂模式

把对象创建和使用分开。

public interface PaymentService{
    public void pay();
}

public class AliPayService implements PaymentService{

    @Override
    public void pay(){
        System.out.println("支付宝支付...");
    }
}

public class WeChatService implements PaymentService{

    @Override
    public void pay(){
        System.out.println("微信支付...");
    }
}

public class PayMentFactory{

    public static PaymentService getPaymentService(Integer payType){
        PaymentService paymentService = null;
        switch(payType){
            case 0:
                paymentService = new AliPayService();
                break;
            case 1:
                paymentService = new WeChatService();
                break;
        }
        return paymentService;
    }
}


public class Test{

    public static void main(String[] args){
        PaymentService paymentService = PayMentFactory.getPaymentService(1);
        paymentService.pay();
    }
}