工厂模式

工厂模式

该模式通过向工厂传递类型来指定要创建的对象。

XiaoMiPhone ，小米手机

public interface XiaoMiPhone {
    void buy();
}

XiaoMi7

class XiaoMi7 implements XiaoMiPhone{
    public void buy() {
        System.out.println("购买了XiaoMi7");
    }
}

XiaoMi8

class XiaoMi8 implements XiaoMiPhone{
    public void buy() {
        System.out.println("购买了XiaoMi8");
    }
}

XiaoMi9

class XiaoMi9 implements XiaoMiPhone{
    public void buy() {
        System.out.println("购买了XiaoMi9");
    }
}

XiaoMiFactory ，小米旗舰店，告知你要买的手机型号就可以得到对应的对象。

public class XiaoMiFactory {
    public static XiaoMiPhone getXiaoMiPhone(String type){
        if("小米7".equals(type)){
            return new XiaoMi7();
        }else if("小米8".equals(type)){
            return new XiaoMi8();
        }else if("小米9".equals(type)){
            return new XiaoMi9();
        }else{
            throw new RuntimeException("小米暂时没有这种型号的手机哦！");
        }
    }
}

TestFactor ，测试类

public class TestFactor {
    public static void main(String[] args) {
        XiaoMiPhone mi7 = XiaoMiFactory.getXiaoMiPhone("小米7");
        mi7.buy();
        XiaoMiPhone mi8 = XiaoMiFactory.getXiaoMiPhone("小米8");
        mi8.buy();
        XiaoMiPhone mi9 = XiaoMiFactory.getXiaoMiPhone("小米9");
        mi9.buy();
        XiaoMiPhone mi10 =  XiaoMiFactory.getXiaoMiPhone("小米10");
    }
}

测试结果

来源：CSDN

作者：Fu_xionghui

链接：https://blog.csdn.net/Fu_xionghui/article/details/104885025