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 {
@Autowired
private TargetInterface target;
@Test
public 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]
