设计模式14——适配器模式

适配器模式可以使接口不相同的几个对象通过适配来统一接口。Target与Adaptee各自拥有自己的方法，但接口不同，可以通过Adapter进行统一。

 1 #ifndef Adapter_H_H
 2 #define Adapter_H_H
 3
 4 #include <iostream>
 5 using namespace std;
 6
 7 class Target
 8 {
 9 public:
10     virtual void display() { cout << "This is a common target!" << endl; }
11     virtual ~Target() {}
12 };
13
14 class Adaptee
15 {
16 public:
17     void specialDisplay() { cout << "This is a special target!" << endl; }
18 };
19
20 class Adapter : public Target
21 {
22 public:
23     Adapter() : adaptee(new Adaptee()) {}
24     virtual void display() { adaptee->specialDisplay(); }
25     ~Adapter() { delete adaptee; }
26
27 private:
28     Adaptee *adaptee;
29 };
30
31
32 void AdapterTest()
33 {
34     Target *target1 = new Target();
35     Target *target2 = new Adapter();
36
37     target1->display();
38     target2->display();
39
40     delete target1;
41     delete target2;
42 }
43
44
45 #endif

运行结果：

Adaptee与Target接口不同，却可以通过Adapter进行统一。