@Target({ElementType.METHOD})

@Retention(RetentionPolicy.RUNTIME)

@Documented

@Component

public @interface DemoAnno {

    String value()  default "";

}

@Pointcut("@annotation(com.hephae.aop.aop.DemoAnno)")

    public void demoAspect() {

    }

    @Around(value = "demoAspect()")

    public Object around(ProceedingJoinPoint joinPoint) throws Throwable {

        Signature signature = joinPoint.getSignature();

        MethodSignature methodSignature = (MethodSignature)signature;

        //method为接口的Method对象，获取不到实现类方法上的注解

        Method method = methodSignature.getMethod();

        //targetMethod为实现类方法对象

        Method targetMethod = joinPoint.getTarget().getClass().getMethod(method.getName(), method.getParameterTypes());

        //获取注解

        DemoAnno demoAnno = targetMethod.getAnnotation(DemoAnno.class);

        if (demoAnno != null) {

            String value = demoAnno.value();

        }

        Object obj = null;

        obj = joinPoint.proceed();

        return obj;

    }