Java-马士兵设计模式学习笔记-装饰者模式

1.Worker.java
package decorator;

public interface Worker {
public void doSomething();
}

2.Plumber.java

public class Plumber implements Worker {

@Override
public void doSomething() {
System.out.println("修理水管");
}

}

3.Carpenter

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

4.测试代码 Test.java

public class Test {
public static void main(String[] args) {
Worker worker = null;
Carpenter carpenter = new Carpenter();
Plumber plumber = new Plumber();
worker = carpenter;
worker.doSomething();
worker = plumber;
worker.doSomething();
}
}

增加类 AWorker.java

public class AWorker implements Worker {

private Worker worker;

//通过些构造函数，AWorker就可以得到具体工种的引用，
//为下面的doSomething()方法中加入A公司的特殊要求做准备
public AWorker(Worker worker){
this.worker = worker;
}

@Override
public void doSomething() {
System.out.println("您好！我是A公司的员工");
worker.doSomething();
}

}

//增加类 BWorker.java

public class BWorker implements Worker {

private Worker worker;

public BWorker(Worker worker){
this.worker = worker;
}

@Override
public void doSomething() {
System.out.println("您好！我是B公司的员工。");
worker.doSomething();
}

}

//测试代码

public static void main(String[] args) {

//A公司
Carpenter carpenterA = new Carpenter();
Plumber plumberA = new Plumber();
AWorker aWorker1 = new AWorker(carpenterA);
AWorker aWorker2 = new AWorker(plumberA);

aWorker1.doSomething();
aWorker2.doSomething();

System.out.println("==================================");

//B公司
Carpenter carpenterB = new Carpenter();
Plumber plumberB = new Plumber();
BWorker bWorker1 = new BWorker(carpenterB);
BWorker bWorker2 = new BWorker(plumberB);

bWorker1.doSomething();
bWorker2.doSomething();
}
}