今天在測試Spring的AOP時,發現使用注解配置AOP的方式會導致通知的執行順序紊亂。【最終通知居然在異常通知之前執行了】

測試代碼

(1)定義TargetInterface目標接口

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

(2)定義TargetImpl目標類

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

(3)定義切面類(內含增強方法)

@Component('myAspect')//定義切面類@Aspect//聲明當前類是切面類public class TargetAspect {//定義切點表達式@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('最終通知......');}@AfterReturning('pt()')public void afterReturning() { System.out.println('后置通知......');}@AfterThrowing('pt()')public void afterThrowing() { System.out.println('異常通知......');}}

(4)配置applicationContextAnno.xml文件

<!--配置組件掃描的包--><context:component-scan base-package='com.ahzyy'/><!--配置AOP自動代理--><aop:aspectj-autoproxy/>

(5)定義測試類

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

(6)運行結果:

【最終通知在異常通知之前執行了!!!】

(7)解決方法:

(7.1)使用xml配置方式配置AOP;

(7.2)注解使用@Around(環繞通知)方式配置AOP(修改TargetAspect類使用環繞通知);

@Component('myAspect')//定義切面類@Aspect//聲明當前類是切面類public class TargetAspect {//定義切點表達式@Pointcut('execution(* com.ahzyy.target.impl.*.*(..))')public void pt() {}@Around('pt()')public Object aroundNotice(ProceedingJoinPoint pjp) { System.out.println('環繞通知'); Object result = null; before();//前置通知 try { result = pjp.proceed(); afterReturning();//后置通知 } catch (Throwable throwable) {afterThrowing();//異常通知 throwable.printStackTrace(); } after();//最終通知 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('異常通知......');}public void after() { System.out.println('最終通知......');}}

(7.3)運行結果

[運行順序正確]

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