cglib动态代理

public class TestCglibProxy {

    public static void main(String[] args) {

        UserService userService  = new UserServiceImpl();

        CglibProxy cglibProxy = new CglibProxy();

        Enhancer enhancer = new Enhancer();
        //设置父类,因为Cglib是针对指定的类生成一个子类，所以需要指定父类
        enhancer.setSuperclass(userService.getClass());
        enhancer.setCallback(cglibProxy);// 设置回调
        UserService userServiceImpl = (UserService)enhancer.create();//创建并返回代理对象

        userServiceImpl.save();
    }
}


class CglibProxy implements MethodInterceptor{

    @Override
    public Object intercept(Object o, Method method, Object[] objects, MethodProxy methodProxy) throws Throwable {
        System.out.println("开始");
        Object result = methodProxy.invokeSuper(o, objects);
        System.out.println("结束");
        return result;
    }
}

interface UserService{

    void save();
}

class UserServiceImpl implements UserService{

    @Override
    public void save() {
        System.out.println("save method");
    }
}