[设计模式]策略模式

public interface Strategy {
    void doWork();
}

public class AliPay implements Strategy {
    @Override
    public void doWork() {
        System.out.println("正在使用支付宝支付");
    }
}

public class wxPay implements Strategy{
    @Override
    public void doWork() {
        System.out.println("正在使用微信支付");
    }
}

public class Context {
    private Strategy strategy;
    public void doWork(){
        strategy.doWork();
    }
    public void setStrategy(Strategy strategy) {
        this.strategy = strategy;
    }
}

public class Main {
    public static void main(String[] args) {
        Context context = new Context();

        AliPay aliPay = new AliPay();
        context.setStrategy(aliPay);
        context.doWork();

        wxPay wxPay = new wxPay();
        context.setStrategy(wxPay);
        context.doWork();
    }
}