AOP获取切入点方法的参数

• JointPoint对象描述了连接点方法的运行状态，可以获取到原始方法的调用参数

  @Before("pt()")
  public void before(JoinPoint joinPoint){
      Object[] args = joinPoint.getArgs();
      System.out.println(Arrays.toString(args));
      System.out.println("before advice ...");
  }
  

• ProceedJointPoint是JointPoint的子类

  @Around("pt()")
  public Object around(ProceedingJoinPoint pjp) throwsThrowable{
      Object[] args = pjp.getArgs();
      System.out.println(Arrays.toString(args));
      args[0] = 666;  // 对参数进行处理
      Object ret = pjp.proceed(args);
      return ret;
  }