自定義註解：

@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Component
public @interface DemoAnno {
    String value()  default "";
}

AOP：

    @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為接口的Method對象，獲取不到實現類方法上的註解
        Method method = methodSignature.getMethod();
        //targetMethod為實現類方法對象
 

        Method targetMethod = joinPoint.getTarget().getClass().getMethod(method.getName(), method.getParameterTypes());
        DemoAnno demoAnno = targetMethod.getAnnotation(DemoAnno.class);
        if (demoAnno != null) {
            String value = demoAnno.value();
        }
        Object obj = null
 
;
        obj = joinPoint.proceed();
        return obj;
    }

AOP通過反射獲取自定義註解