public interface Encoreable {

    void nextPerformance();

}

@Component

public class DefaultEncoreablePerform implements Encoreable {

    @Override

    public void nextPerformance() {

        System.out.println("这是一场返场表演");

    }

}

public interface Performance {

    public void perform(int num);

}

@Component

public class MusicPerformance implements Performance {

    @Override

    public void perform(int num) {

        if (num > 0) {

            System.out.println(1 / num);

        } else {

            System.out.println("Concurred Exception ");

            throw new NumberFormatException();

        }

        System.out.println("精彩的表演");

    }

}

@Configuration

@ComponentScan

@EnableAspectJAutoProxy

public class ConfigAop {

}

@Aspect

@Component

public class AddAspectAudience {

    @DeclareParents(value = "Performance+", defaultImpl = DefaultEncoreablePerform.class)

    public static Encoreable encoreable;

}

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration(classes = com.aop.ConfigAop.class)

public class AopAspectjTest {

    @Autowired

    private Performance performance;

    @Test

    public void testAop() {

        performance.perform(1);

        Encoreable encoreable = (Encoreable) (performance);

        encoreable.nextPerformance();

    }

}