设计模式(中介者模式)
中介者模式提供一个统一的中介接口Mediator,与多个目标对象交互。如下图:
代码如下:
- Mediator
public abstract class Mediator { public abstract void notice(String content); }
- ConcreteMediator
public class ConcreteMediator extends Mediator { //这里可以有多个目标 //private Target target1 //private Target target2 private Target target; //也可以构造addTarget以维护一个处理对象的列表 public ConcreteMediator(){ target = new ConcreteTarget(); } @Override public void notice(String content) { target.doSomething(content); } }
- Target
public abstract class Target { public abstract void doSomething(String content); }
- ConcreteTarget
public class ConcreteTarget extends Target { @Override public void doSomething(String content) { System.out.println("ConcreteTarget doSomething" + content); } }
- App 测试类
public class App { public static void main(String[] args) { Mediator mediator = new ConcreteMediator(); mediator.notice("Fredric"); } }