所谓的代理者是指一个类别可以作为其它东西的接口。代理者可以作任何东西的接口：网络连接、存储器中的大对象、文件或其它昂贵或无法复制的资源。著名的代理模式例子为引用计数（英语：reference counting）指针对象。
代理模式
为别人做嫁衣
UML类图
代码实现
GiveGift
1
2
3
4
5
6
7
| package com.lei.designpatterns.proxy;
public interface GiveGift {
void giveDollar();
void giveFlowers();
void giveChocolate();
}
|
SchoolGirl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
| package com.lei.designpatterns.proxy;
public class SchoolGirl {
private String name;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public SchoolGirl(String name){
this.name = name;
}
}
|
Pursuit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
| package com.lei.designpatterns.proxy;
public class Pursuit implements GiveGift {
private SchoolGirl mm;
public Pursuit(SchoolGirl mm){
this.mm = mm;
}
@Override
public void giveDollar() {
System.out.println("Give dollar.");
}
@Override
public void giveFlowers() {
System.out.println("Give flowers.");
}
@Override
public void giveChocolate() {
System.out.println("Give chocolate.");
}
}
|
Proxy
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
| package com.lei.designpatterns.proxy;
public class Proxy implements GiveGift {
private Pursuit gg;
public Proxy(SchoolGirl mm){
gg = new Pursuit(mm);
}
@Override
public void giveDollar() {
this.gg.giveDollar();
}
@Override
public void giveFlowers() {
this.gg.giveFlowers();
}
@Override
public void giveChocolate() {
this.gg.giveChocolate();
}
}
|