手写SpringAop

public interface IUserDao {
    public void save();
}

@Component
public class UserDao implements IUserDao {

    public void save() {
        System.out.println("保存成功");
    }
}

@Component
public class MyAop {
    public void begin(){
        System.out.println("开启事务");
    }

    public void commit(){
        System.out.println("提交事物");
    }
}

 * @author evanyang
 */
public class ProxyFactoryDemo {
    private static Object target;
    private static MyAop myAop_;

    public static Object getProxyInstanceDemo(Object object, MyAop myAop) {
        target = object;
        myAop_ = myAop;
        return Proxy.newProxyInstance(
                target.getClass().getClassLoader(), target.getClass().getInterfaces(),
                new InvocationHandler() {
                    public Object invoke(Object proxy, Method method, Object[] args) throws InvocationTargetException, IllegalAccessException {
                        myAop_.begin();
                        Object invoke = method.invoke(target, args);
                        myAop_.commit();
                        return invoke;
                    }
                }
        );
    }
}

<!-- 扫描包范围 -->
	<context:component-scan base-package="com.evan"></context:component-scan>
	<aop:aspectj-autoproxy></aop:aspectj-autoproxy>
	<bean id="userDao_proxy" class="com.evan.aopImplements.ProxyFactoryDemo" factory-method="getProxyInstanceDemo">
		<constructor-arg index="0" ref="userDao"></constructor-arg>
		<constructor-arg index="1" ref="myAop"></constructor-arg>
	</bean>

public class TestDemo {

    public static void main(String[] args) {
        ClassPathXmlApplicationContext app = new ClassPathXmlApplicationContext("spring.xml");
        IUserDao userDao =(IUserDao) app.getBean("userDao_proxy");
        userDao.save();
        //BeanFactory
        //BeanDefinition
        DispatcherServlet
    }
 }