在C++中,我們可以通過(guò)模板和設(shè)計(jì)模式來(lái)實(shí)現(xiàn)類似于Spring框架的自定義擴(kuò)展。以下是一個(gè)簡(jiǎn)單的示例,展示了如何使用C++實(shí)現(xiàn)一個(gè)簡(jiǎn)化版的Spring框架的自定義擴(kuò)展:
class InitializingBean {
public:
virtual void afterPropertiesSet() = 0;
};
class DisposableBean {
public:
virtual void destroy() = 0;
};
#include <map>
#include<string>
class BeanFactory {
private:
std::map<std::string, InitializingBean*> initializingBeans;
std::map<std::string, DisposableBean*> disposableBeans;
public:
template<typename T>
void registerBean(const std::string& name, T* bean) {
if (InitializingBean* initializingBean = dynamic_cast<InitializingBean*>(bean)) {
initializingBeans[name] = initializingBean;
}
if (DisposableBean* disposableBean = dynamic_cast<DisposableBean*>(bean)) {
disposableBeans[name] = disposableBean;
}
}
void initializeBeans() {
for (auto& entry : initializingBeans) {
entry.second->afterPropertiesSet();
}
}
void destroyBeans() {
for (auto& entry : disposableBeans) {
entry.second->destroy();
}
}
};
InitializingBean
和DisposableBean
接口。class MyBean : public InitializingBean, public DisposableBean {
public:
void afterPropertiesSet() override {
std::cout << "MyBean initialized"<< std::endl;
}
void destroy() override {
std::cout << "MyBean destroyed"<< std::endl;
}
};
int main() {
BeanFactory beanFactory;
MyBean* myBean = new MyBean();
beanFactory.registerBean("myBean", myBean);
beanFactory.initializeBeans();
// 使用Bean...
beanFactory.destroyBeans();
delete myBean;
return 0;
}
這個(gè)示例展示了如何在C++中實(shí)現(xiàn)一個(gè)簡(jiǎn)化版的Spring框架的自定義擴(kuò)展。在實(shí)際項(xiàng)目中,你可能需要根據(jù)需求進(jìn)行更多的擴(kuò)展和優(yōu)化。