装饰模式
1、什么是装饰模式2、装饰模式的结构3、装饰模式的角色和职责4、代码实现
1、什么是装饰模式
2、装饰模式的结构
3、装饰模式的角色和职责
抽象组件角色： 一个抽象接口，是被装饰类和装饰类的父接口。具体组件角色：为抽象组件的实现类。抽象装饰角色：包含一个组件的引用，并定义了与抽象组件一致的接口。具体装饰角色：为抽象装饰角色的实现类。负责具体的装饰。
4、代码实现
package com.example.demo03;
public interface Car {
public void show();
public void run();
}
package com.example.demo03;
public abstract class CarDecorator implements Car{
private Car car;
public CarDecorator(Car car){
this.car = car;
}
public abstract void show();
public Car getCar() {
return car;
}
public void setCar(Car car) {
this.car = car;
}
}
package com.example.demo03;
public class FlyCarDecorator extends CarDecorator{
public FlyCarDecorator(Car car) {
super(car);
}
@Override
public void show() {
this.getCar().show();
this.fly();
}
public void fly(){
System.out.println("可以飞");
}
@Override
public void run() {
// TODO Auto-generated method stub
}
}
package com.example.demo03;
public class SwimCarDecorator extends CarDecorator{
public SwimCarDecorator(Car car) {
super(car);
}
@Override
public void show() {
this.getCar().show();
this.swim();
}
public void swim(){
System.out.println("可以游");
}
@Override
public void run() {
// TODO Auto-generated method stub
}
}
package com.example.demo03;
public class RunCar implements Car{
@Override
public void show() {
this.run();
}
public void run(){
System.out.println("可以跑");
}
}
package com.example.demo03;
import org.junit.Test;
public class MainClass {
@Test
public void test01(){
Car flyCar = new RunCar();
CarDecorator carDecorator = new FlyCarDecorator(flyCar);
carDecorator.show();
carDecorator = new SwimCarDecorator(flyCar);
carDecorator.show();
}
@Test
public void test02(){
Car car = new RunCar();
car.show();
System.out.println("------------------------------------");
CarDecorator fly = new FlyCarDecorator(car);
fly.show();
System.out.println("------------------------------------");
CarDecorator swimFly = new SwimCarDecorator(fly);
swimFly.show();
}
@Test
public void test03(){
Car car = new RunCar();
CarDecorator fly = new FlyCarDecorator(car);
CarDecorator swimFly = new SwimCarDecorator(fly);
swimFly.show();
}
}
