Java　接口标准定义　　工厂设计模式　　代理设计模式

我不是女神ヾ 2023-01-07 04:59 84阅读 0赞

接口标准定义

package com.msc.example;
    interface IUSB{ 
        public boolean check() ;
        public void work() ;
    
    }
    class Computer{ 
        public void plugin(IUSB iusb){ 
            if (iusb.check()){ 
                iusb.work();
            }else{ 
                System.out.println("硬件设备出错");
            }
        }
    }
    class keyBoard implements IUSB{ 
        public boolean check() { 
            return  true ;
        }
        @Override
        public void work() { 
            System.out.println("键盘开始工作");
        }
    }
    class Print implements IUSB{ 
        public boolean check() { 
            return  false ;
        }
        @Override
        public void work() { 
            System.out.println("打印机开始工作");
        }
    }
    public class InterfaceDemo { 
        public static void main(String[] args) { 
        Computer computer = new Computer() ;
        computer.plugin(new keyBoard());
        computer.plugin(new Print());
        }
    }

工厂设计模式  
[泛型改进工厂设计模式][Link 1]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDgwNjA3_size_16_color_FFFFFF_t_70]

package com.msc.example;
    interface IFood{ 
         public void eat() ;
    }
    class Factory{ 
        public static IFood getInstance(String classname) { 
            switch(classname){ 
                case "bread": { 
                    return new Bread();
                } case "milk" : { 
                    return new Milk() ;
                } default:{ 
                    return null;
                }
            }
        }
    }
    class Bread implements IFood{ 
        @Override
        public void eat(){ 
            System.out.println("吃面包");
        }
    }
    class Milk implements IFood{ 
        @Override
        public void eat() { 
            System.out.println("喝牛奶");
        }
    }
    
    public class FactoryModel { 
        public static void main(String[] args) { 
            IFood ifood = Factory.getInstance("milk");
            ifood.eat();
            ifood = Factory.getInstance("bread");
            ifood.eat();
        }
    }

代理设计模式  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDgwNjA3_size_16_color_FFFFFF_t_70 1]

package com.msc.example;
    interface IEat{ 
        public void get() ;
    }
    class EatNeed implements IEat{ 
        public void get() { 
            System.out.println("【真实主题】获得食物开吃");
        }
    }
    class EatProxy implements IEat{ 
        private IEat eat ;
        public EatProxy () { } ;
        public EatProxy(IEat eat){ 
            this.eat = eat ;
        }
        public void get() { 
            this.prepare() ;
            this.eat.get() ;
            this.clear() ;
        }
        public void prepare() { 	// 准备过程
            System.out.println("【代理主题】1、精心购买食材。") ;
            System.out.println("【代理主题】2、小心的处理食材。") ;
        }
        public void clear() { 
            System.out.println("【代理主题】3、收拾碗筷。");
        }
    }
    public class ProxyModel { 
        public static void main(String[] args) { 
            IEat eat = new EatProxy(new EatNeed()) ;
            eat.get() ;
        }
    }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDgwNjA3_size_16_color_FFFFFF_t_70 2]

[Link 1]: https://blog.csdn.net/qq_21480607/article/details/112676160
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDgwNjA3_size_16_color_FFFFFF_t_70]: /images/20221119/830ed6dd82ee496ea83b1385833385dd.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDgwNjA3_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20210115170116387.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDgwNjA3,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDgwNjA3_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20210115170655584.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIxNDgwNjA3,size_16,color_FFFFFF,t_70