Spring框架基于注解的AOP之各种通知的使用与环绕通知实现详解

    @Pointcut("execution(* com.tian.spring.aop.annotation.CalculatorImpl.*(..))")
    public void pointCut() {
    }

//    @Before("execution(public int com.tian.spring.aop.annotation.CalculatorImpl.add(int,int))")
//    @Before("execution(* com.tian.spring.aop.annotation.*.*(..))")
    @Before("pointCut()")
    public void beforeAdviceMethod(JoinPoint joinPoint) {
        //获取连接点所对应方法的签名信息
        Signature signature = joinPoint.getSignature();
        //获取连接点所对应方法的参数
        Object[] args = joinPoint.getArgs();
        System.out.println("LoggerAspect,方法：" + signature.getName() + ",参数" + Arrays.toString(args));
    }

    @After("pointCut()")
    public void afterAdviceMethod(JoinPoint joinPoint) {
        //获取连接点所对应方法的签名信息
        Signature signature = joinPoint.getSignature();
        System.out.println("LoggerAspect，方法：" + signature.getName() + ",执行完毕");
    }

    /**
     *在返回通知中若要获取目标对象方法的返回值
     *只需要通过@AfterReturning注解的returnings属性
     * 就可以将通知方法的某个参数指定为接收目标对象方法的返回值的参数
     */
    @AfterReturning(value = "pointCut()",returning = "result")
    public void afterReturningAdviceMethod(JoinPoint joinPoint,Object result) {
        //获取连接点所对应方法的签名信息
        Signature signature = joinPoint.getSignature();
        System.out.println("LoggerAspect，方法" + signature.getName() + ",结果：" + result);
    }

    /**
     *在异常通知中若要获取目标对象方法的异常
     *只需要通过@AfterThrowing注解的throwing属性
     * 就可以将通知方法的某个参数指定为接收目标对象方法的异常的参数
     */
    @AfterThrowing(value = "pointCut()",throwing = "ex")
    public void afterThrowingAdvice(JoinPoint joinPoint,Throwable ex) {
        Signature signature = joinPoint.getSignature();
        System.out.println("LoggerAspect,方法：" + signature.getName() + ",异常：" + ex);
    }

 @Around("pointCut()")
    public Object aroundAdviceMethode(ProceedingJoinPoint joinPoint) {
        Object result = null;
        try {
            System.out.println("环绕通知-->前置通知");
            //表示目标对象方法的执行
            result = joinPoint.proceed();
            System.out.println("环绕通知-->返回通知");
        } catch (Throwable e) {
            e.printStackTrace();
            System.out.println("环绕通知-->异常通知");
        } finally {
            System.out.println("环绕通知-->后置通知");
        }
        return result;
    }

    @Test
    public void testAOPByAnnotation() {
        ApplicationContext ioc = new ClassPathXmlApplicationContext("aop-annotation.xml");
        Calculator calculator = ioc.getBean(Calculator.class);
        calculator.div(10,1);
    }