杭州哪些做网站公司,注册网站流程,mt7620a做网站,在线视频播放网站开发本质#xff1a;实例化对象不用new#xff0c;用工厂代替#xff0c;实现了创建者和调用者分离 满足#xff1a; 开闭原则#xff1a;对拓展开放#xff0c;对修改关闭 依赖倒置原则#xff1a;要针对接口编程 迪米特原则#xff1a;最少了解原则#xff0c;只与自己直… 本质实例化对象不用new用工厂代替实现了创建者和调用者分离 满足 开闭原则对拓展开放对修改关闭 依赖倒置原则要针对接口编程 迪米特原则最少了解原则只与自己直接相关的类有关系 简单工厂模式 也被称为静态工厂 public interface Car {void name();
}
public class BWM implements Car{
Overridepublic void name() {System.out.println(宝马);}
}
public class DaZhong implements Car{
Overridepublic void name() {System.out.println(大众);}
} public class CarFactory{public static Car getCar(String name){if(name.equals(大众)){return new DaZhong();}else if (name.equals(宝马)){return new BWM();}else{return null;}}
}
public class consumer {public static void main(String[] args) {
Car car CarFactory.getCar(大众);car.name();Car car2 CarFactory.getCar(宝马);car2.name();}
} 总结 将创建对象的任务交给工厂去完成 缺点 不满足开闭原则如果我们新创建一个车就需要修改CarFactory的源代码
工厂方法模式 多个工厂对应多个实现类 public interface CarFactory {
Car getCar();
}
public class BMWFactory implements CarFactory{Overridepublic Car getCar() {return new BWM();}
}
public class DaZhongFactory implements CarFactory{Overridepublic Car getCar() {return new DaZhong();}
}
如果我们想要创建新的车对象只要创建对应的车工厂即可无需修改CarFactory的代码
public class Aodi implements Car {Overridepublic void name() {System.out.println(奥迪);}
}public class AodiFactory implements CarFactory{Overridepublic Car getCar() {return new Aodi();}
}public class consumer {public static void main(String[] args) {Car car new DaZhongFactory().getCar();car.name();Car car1 new BMWFactory().getCar();car1.name();Car car2 new AodiFactory().getCar();car2.name();}
}抽象工厂模式 围绕一个超级工厂生产工厂该工厂又称为其他工厂的工厂 抽象的抽象 public interface IProductFactory {IPhoneProduct iphoneproduct();IRouterProduct irouterproduct();
} 具体的产品工厂 public class XiaomiFactory implements IProductFactory{Overridepublic IPhoneProduct iphoneproduct() {return new XiaomiPhone();}Overridepublic IRouterProduct irouterproduct() {return new XiaomiRouter();}
}
public class HuaweiFactory implements IProductFactory{Overridepublic IPhoneProduct iphoneproduct() {return new HuaweiPhone();}Overridepublic IRouterProduct irouterproduct() {return new HuaweiRouter();}
} 产品功能 public interface IPhoneProduct {void open();void close();
}
public interface IRouterProduct {void open();void close();} 具体实现 public class XiaomiPhone implements IPhoneProduct{Overridepublic void open() {System.out.println(小米手机开机);}Overridepublic void close() {System.out.println(小米手机关机);}
}public class HuaweiPhone implements IPhoneProduct{Overridepublic void open() {System.out.println(华为手机开机);}Overridepublic void close() {System.out.println(华为手机关机);}
}
public class XiaomiRouter implements IRouterProduct{Overridepublic void open() {System.out.println(小米路由器开机);}Overridepublic void close() {System.out.println(小米路由器关机);}
}
public class HuaweiRouter implements IRouterProduct{Overridepublic void open() {System.out.println(华为路由器开机);}Overridepublic void close() {System.out.println(华为路由器关机);}
} 测试 public class consumer {public static void main(String[] args) {//先创建工厂System.out.println(小米);IPhoneProduct product new XiaomiFactory().iphoneproduct();product.open();product.close();IRouterProduct irouterproduct new XiaomiFactory().irouterproduct();irouterproduct.open();irouterproduct.close();System.out.println(华为);IPhoneProduct iphoneproduct new HuaweiFactory().iphoneproduct();iphoneproduct.open();iphoneproduct.close();IRouterProduct irouterproduct1 new HuaweiFactory().irouterproduct();irouterproduct1.open();irouterproduct1.close();}
}
