今天在测试Spring的AOP时,发现使用注解配置AOP的方式会导致通知的执行顺序紊乱。【最终通知居然在异常通知之前执行了】

测试代码

(1)定义TargetInterface目标接口

public interface TargetInterface {public abstract void targetProxy();}

(2)定义TargetImpl目标类

@Component("target")public class TargetImpl implements TargetInterface {public void targetProxy() { System.out.println("target proxy ......"); int i = 1/0;//异常}}

(3)定义切面类(内含增强方法)

@Component("myAspect")//定义切面类@Aspect//声明当前类是切面类public class TargetAspect {//定义切点表达式@Pointcut("execution(* com.ahzyy.target.impl.*.*(..))")public void pt() {}@Before("pt()")public void before() { System.out.println("前置通知......");}@After("pt()")public void after() { System.out.println("最终通知......");}@AfterReturning("pt()")public void afterReturning() { System.out.println("后置通知......");}@AfterThrowing("pt()")public void afterThrowing() { System.out.println("异常通知......");}}

(4)配置applicationContextAnno.xml文件

<!--配置组件扫描的包--><context:component-scan base-package="com.ahzyy"/><!--配置AOP自动代理--><aop:aspectj-autoproxy/>

(5)定义测试类

@RunWith(SpringJUnit4ClassRunner.class)//@ContextConfiguration("classpath:applicationContext.xml")@ContextConfiguration("classpath:applicationContextAnno.xml")public class AopTest {@Autowiredprivate TargetInterface target;@Testpublic void test01() { target.targetProxy();}}

(6)运行结果:

【最终通知在异常通知之前执行了!!!】

(7)解决方法:

(7.1)使用xml配置方式配置AOP;

(7.2)注解使用@Around(环绕通知)方式配置AOP(修改TargetAspect类使用环绕通知);

@Component("myAspect")//定义切面类@Aspect//声明当前类是切面类public class TargetAspect {//定义切点表达式@Pointcut("execution(* com.ahzyy.target.impl.*.*(..))")public void pt() {}@Around("pt()")public Object aroundNotice(ProceedingJoinPoint pjp) { System.out.println("环绕通知"); Object result = null; before();//前置通知 try { result = pjp.proceed(); afterReturning();//后置通知 } catch (Throwable throwable) { afterThrowing();//异常通知 throwable.printStackTrace(); } after();//最终通知 return result;}public void before() { System.out.println("前置通知......");}public void afterReturning() { System.out.println("后置通知......");}public void afterThrowing() { System.out.println("异常通知......");}public void after() { System.out.println("最终通知......");}}

(7.3)运行结果

[运行顺序正确]

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