//20210118

写在前面：刚期末考试完，考了面向对象，里边儿有23个设计模式，我寻思着考完挨个儿实现一下，本文实现装饰者模式

核心思想：

构建一个带有原始属性的对象，然后通过附加类来一层一层的装饰原有对象

源代码如下：

//初始接口

public interface Man {

String getDes();

}

//带有初始属性的类

public class NormalMan implements Man{

private String name;

public NormalMan(String name){

this.name = name;

}

@Override

public String getDes() {

return name + ":";

}

}

//抽象装饰类

public abstract class AttachedPropertiesDecorator implements Man{

private Man man;

public AttachedPropertiesDecorator(Man man){

this.man = man;

}

@Override

public String getDes() {

return man.getDes();

}

}

//实现装饰类1

public class CarDecorator extends AttachedPropertiesDecorator{

private String car = "有车";

public CarDecorator(Man man) {

super(man);

}

public String addCar(){

return this.car+" ";

}

@Override

public String getDes() {

return super.getDes()+this.addCar();

}

}

//实现装饰类2

public class DepositeDecorator extends AttachedPropertiesDecorator{

private String deposite = "有存款";

public DepositeDecorator(Man man) {

super(man);

}

public String addDeposite(){

return this.deposite+" ";

}

@Override

public String getDes() {

return super.getDes() + this.addDeposite();

}

}

//实现装饰类3

public class HouseDecorator extends AttachedPropertiesDecorator{

private String house = "有房";

public HouseDecorator(Man man) {

super(man);

}

public String addHouse(){ return this.house+" ";

}

@Override

public String getDes() {

return super.getDes() + this.addHouse();

}

}

//实现装饰类4

public class QualityDecorator extends AttachedPropertiesDecorator{

private String quality = "有好品质";

public QualityDecorator(Man man) {

super(man);

}

public String addQuality(){

return this.quality+" ";

}

@Override

public String getDes() {

return super.getDes() + this.addQuality();

}

}

//测试主类

public class Main {

public static void main(String[] args) {

Man man= new NormalMan("张三");

System.out.println(man.getDes());

man = new CarDecorator(man);//加入车属性

System.out.println(man.getDes());

man = new DepositeDecorator(man);//加入存款属性

System.out.println(man.getDes());

man = new HouseDecorator(man);//加入房屋属性

System.out.println(man.getDes());

man = new QualityDecorator(man);//加入房屋属性

System.out.println(man.getDes());

}

}

输出如下:

以上

希望对大家有所帮助