JAVA装饰者模式简单示例

背景：建立一个工人管理系统，工人的父类下有水管工、木匠等子类，也有A公司工人、B公司工人等子类，装饰者模式就是将工种类型作为参数传到某公司类中，从而简化了所需建立的子类数量。

interface Worker{public void doWork();}

class Plumber implements Worker{public void doWork(){System.out.println("修水管");}}

class Carpenter implements Worker{public void doWork(){System.out.println("修门窗");}}

class AWorker implements Worker{private Worker worker;public AWorker(Worker worker){this.worker=worker;}public void doWork(){System.out.println("你好，我是A公司员工");worker.doWork();}}

class BWorker implements Worker{private Worker worker;public BWorker(Worker worker){this.worker=worker;}public void doWork(){System.out.println("你好，我是B公司员工");worker.doWork();}}

class Test{public static void main(String args[]){Plumber plumber=new Plumber();AWorker aWorker1=new AWorker(plumber);aWorker1.doWork();Carpenter carpenter=new Carpenter();BWorker bWorker1=new BWorker(carpenter);bWorker1.doWork();}}

执行结果：

你好，我是A公司员工

修水管

你好，我是B公司员工

修门窗