Proxy Pattern
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Brief introduction about Proxy Pattern.
Proxy Pattern
代理模式:
定义:为其他对象提供一种代理以控制对这个对象的访问。
场景:
小明喜欢小红,却不敢向小红献殷勤。小明找他的好朋友小刚(代理)帮忙,给小红送洋娃娃、送花、送巧克力。
故事的结局是:来来去去日久生情,代送礼物的小刚(代理)和小红好上了,小明还是单身狗🐶。
代理模式(Proxy)和装饰器模式(Decorator)模式有啥区别呢?
代理模型是控制Client对真实对象的访问,而装饰器模式是给原有的类增加功能。
代码
public class Client {
public static void main(String[] args) {
Proxy xiao_gang = new Proxy(new Pursuit("Lovely Girl"));
xiao_gang.sendFlower();
xiao_gang.sendChocolate();
xiao_gang.sendDoll();
// Lovely Girl, here is your flower.
// Lovely Girl, here is your chocolate.
// Lovely Girl, here is your doll.
}
}
public interface ISendPresents {
void sendFlower();
void sendDoll();
void sendChocolate();
}
class Pursuit implements ISendPresents {
private String girlName;
public Pursuit(String name) {
this.girlName = name;
}
@Override
public void sendFlower() {
System.out.printf("%s, here is your flower.\n", girlName);
}
@Override
public void sendDoll() {
System.out.printf("%s, here is your doll.\n", girlName);
}
@Override
public void sendChocolate() {
System.out.printf("%s, here is your.\n", girlName);
}
}
class Proxy implements ISendPresents {
private Pursuit p;
public Proxy(Pursuit p) {
this.p = p;
}
@Override
public void sendFlower() {
p.sendFlower();
}
@Override
public void sendDoll() {
p.sendDoll();
}
@Override
public void sendChocolate() {
p.sendFlower();
}
}
2019-11-20