设计模式——代理模式（C++实现）
1 #include <iostream> 2 #include <string> 3 4 using namespace std; 5 6 7 class CSubject 8 { 9 public: 10 virtual void Request() = 0; 11 }; 12 13 class CRealSubject: public CSubject 14 { 15 public: 16 virtual void Request() 17 { 18 cout<< "ReadSubject request....."<< endl; 19 } 20 21 }; 22 23 class CProxy: public CSubject 24 { 25 public: 26 CProxy() 27 { 28 m_pstRealSubject = new CRealSubject(); 29 } 30 31 virtual void Request() 32 { 33 if (m_pstRealSubject == NULL) 34 m_pstRealSubject = new CRealSubject(); 35 36 cout<< "CProxy Request...."<< endl; 37 m_pstRealSubject->Request(); 38 } 39 40 private: 41 CRealSubject* m_pstRealSubject; 42 }; 43 44 45 int main(int argc, char* argv[]) 46 { 47 CProxy* pstProxy = new CProxy(); 48 pstProxy->Request(); 49 50 return 0; 51 } 52 ///////////////////////////////////// 53 [root@ ~/learn_code/design_pattern/5_proxy]$ ./proxy 54 CProxy Request.... 55 ReadSubject request.....
参考：http://design-patterns.readthedocs.io/zh_CN/latest/structural_patterns/proxy.html
