Spring Aspectj 代理 前置 后置 以及 异常

public interface IDog2 {    public  void  dog();    public  String  run();}public class Dog2 implements IDog2 {    public  void  dog(){        System.out.println("===测试顾问==1dog()");    }    public String run() {        int resul=5/0;        System.out.println("====测试顾问===2run()");        return "add";    }}@Aspectpublic class MyAspectj {    //前置增强    //@Before(value = "execution(* *..springAspectj.*.*(..))")    public  void MyBefore(){        System.out.println("====这是前置增强====");    }    //后置增强   // @AfterReturning(value = "execution(* *..springAspectj.*.*(..))")    public  void After(){        System.out.println("====这是后置增强====");    }    //环绕增强  相对于 后置增强 可以 改变 返回值的 内容   // @Around(value = "execution(* *..springAspectj.*.*(..))")     public  Object  around(ProceedingJoinPoint point) throws Throwable {        System.out.println("==环绕前===");        Object result = point.proceed();        System.out.println("==环绕之后===");        if (result!=null){            String stu=(String)result;            return stu.toUpperCase();        }else {            return  null;        }    }    @AfterThrowing(value = "execution(* *..springAspectj.*.*(..))")    public  void After2(){        System.out.println("====这是异常====");    }}

    //Aspectj 代理    //测试 前置 后置 增强    //测试 环绕增强 可以改变 返回值    //测试 异常    @Test    public  void  aVoid3(){        ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext09Aspectj.xml");        IDog2 dog =(IDog2) ctx.getBean("dog2");        dog.dog();        System.out.println();        String run = dog.run();        System.out.println(run);    }}