大话设计模式java版本 第六章 装饰模式

装饰模式在web开发中尤其常见，在filter中，用的就是装饰模式，在excute前后添加过滤的方法。

package decorator;

public class Person {
private String name;
private int age;
public Person() {
super();
}
public Person(String name, int age) {
super();
this.name = name;
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}

//抽象出来的公共方法
public void show(){
System.out.println(name+"__");
};

}

package decorator;

public class Finery extends Person {
private Person component;

//装饰
public void Decorate(Person component) {
this.component = component;
}
@Override
public void show() {
if(component !=null){

component.show();
}
}
}

package decorator;
/*
* 服饰类
*/
class TShirts extends Finery{
@Override
public void show() {
System.out.println("大T恤");
super.show();
}
}

class BigTrouser extends Finery{
@Override
public void show() {
System.out.println("垮裤");
super.show();
}
}

class Sneakers extends Finery{
@Override
public void show() {
System.out.println("球鞋");
super.show();
}
}

class Suit extends Finery{
@Override
public void show() {
System.out.println("西装");
super.show();
}
}

package decorator;

public class test {
public static void main(String[] args) {
Person p1 = new  Person("Tom", 12);
Sneakers sn = new Sneakers();
Suit su = new Suit();
BigTrouser bt = new BigTrouser();
TShirts ts = new TShirts();

ts.Decorate(p1);
bt.Decorate(ts);
su.Decorate(bt);
sn.Decorate(su);
sn.show();

}
}