小编给大家分享一下@Aspect@Order各个通知的执行顺序是什么，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
@Aspect@Order各个通知的执行顺序
两个切面类：【记录日志】和【判断参数】，分别对应顺序 @Order(0) 和@Order(1) 。
本文只是将重点说下 执行顺序 这么回事哈哈哈
代码
【业务类】
@Controllerpublic class LoginController { //向外面抛出异常 public void loginWithThrow(String username, String password) throws Exception { if (username == null || password == null) { throw new Exception("登录信息不可为空啊"); } System.out.println("LoginController#login..."); } //抛出异常自己捕获的情况 public void loginWithTryCatch(String username, String password) { try{ if (username == null || password == null) { throw new Exception("登录信息不可为空啊"); } System.out.println("LoginController#login..."); }catch (Exception e){ e.printStackTrace(); } }}【切面类】
@Order(0)@Aspect@Componentpublic class LogAspect { //抽出共通的execution用的 //com.yuki.demo.aop.aspect 包或者子包下所有类的方法 @Pointcut("execution(* com.yuki.demo.aop.aspect..*.*(..))") public void pointcut(){ } //前置通知// @Before("execution(public void com.yuki.demo.aop.aspect.LoginController.*(String,String))") @Before("pointcut()") public void before() { System.out.println("LogAspect#before..."); } //环绕通知 //ProceedingJoinPoint 只有环绕通知有 @Around("execution(public void com.yuki.demo.aop.aspect.LoginController.*(String,String))") public void around(ProceedingJoinPoint joinPoint) throws Throwable { System.out.println("LogAspectA#around开始..."); //代理方法的执行，如果没有joinPoint.proceed() ,则前置通知@Before 不会执行，其它的通知正常 joinPoint.proceed(); //执行方法之后，如果joinPoint.proceed() 抛出了异常，则该句不会执行，抛出异常后直接跳出了aroud方法了 System.out.println("LogAspectA#around结束..."); } //后置通知（只要连接点被执行，不管是否抛出异常） @After("execution(public void com.yuki.demo.aop.aspect.LoginController.*(String,String))") public void after() { System.out.println("LogAspect#after..."); } //异常通知（只有在joinPoint.proceed()方法执行向外面抛出了异常，才会执行该通知） @AfterThrowing("execution(public void com.yuki.demo.aop.aspect.LoginController.*(String,String))") public void afterThrowing() { System.out.println("LogAspect#afterThrowing..."); } //正常的返回通知通知（正常结束了才会执行该通知） @AfterReturning("execution(public void com.yuki.demo.aop.aspect.LoginController.*(String,String))") public void afterReturning() { System.out.println("LogAspect#afterReturning..."); }}【切面类】
@Order(1)@Aspect@Componentpublic class SignAspect { @Around("execution(public void com.yuki.demo.aop.aspect.LoginController.*(String,String))") public void around(ProceedingJoinPoint joinPoint) throws Throwable { System.out.println("SignAspect#around开始..."); joinPoint.proceed(); System.out.println("SignAspect#around结束..."); }}【启动配置】
省略。。。非重点
【测试类】
@SpringBootTestclass AopApplicationTests { @Autowired private LoginController loginController; @Test void contextLoads() { loginController.loginWithTryCatch("yuki", "1234"); }}【控制台输出】
LogAspectA#around开始...
LogAspect#before...
SignAspect#around开始...
LoginController#login...
SignAspect#around结束...
LogAspectA#around结束...
LogAspect#after...
LogAspect#afterReturning...
小结
spring AspectJ order(顺序)
@Aspect@Order(2)public class HelloWorldAspectAnnotation { //定义前置通知，注意这里是sayHello2//使用@Before进行前置通知声明，其中value用于定义切入点表达式或引用命名切入点@Before(value="execution(* com.boventech..*.sayHello2(..))&& args(param)",argNames="param")public void beforeAdvice(JoinPoint joinPoint,String param) {System.out.println(1);System.out.println("=======================");System.out.println("===param:" + param);System.out.println("=======================");System.out.println(joinPoint.getArgs().length);System.out.println("=======================");System.out.println(joinPoint.toString());System.out.println("=======================");System.out.println(joinPoint.getTarget());System.out.println("=======================");System.out.println(joinPoint.getThis());System.out.println("=======================");System.out.println("===========before advice");}@AfterReturning(value="execution(* com.boventech..*.sayHello2(..))&& args(param)",argNames="param",pointcut="execution(* com.boventech..*.sayHello2(..))&& args(param)")public void afterFinallyAdvice(JoinPoint joinPoint,String param) {System.out.println("param:"+param);System.out.println("===========");System.out.println("===========after finally advice");}}@Aspect@Order(1)public class HelloWorldAspectAnnotation2 { //定义前置通知，注意这里是sayHello2//使用@Before进行前置通知声明，其中value用于定义切入点表达式或引用命名切入点@Before(value="execution(* com.boventech..*.sayHello2(..))&& args(param)",argNames="param")public void beforeAdvice(JoinPoint joinPoint,String param) {System.out.println(2);System.out.println("=======================");}@AfterReturning(value="execution(* com.boventech..*.sayHello2(..))&& args(param)",argNames="param",pointcut="execution(* com.boventech..*.sayHello2(..))&& args(param)")public void afterFinallyAdvice(JoinPoint joinPoint,String param) {System.out.println("order:" + 2);}}public class AopAnnotationTest {@Test public void testHelloworld() { ApplicationContext ctx = new ClassPathXmlApplicationContext("/helloWorld2.xml"); IHelloWorld2Service helloworldService =ctx.getBean("helloWorld2Service", IHelloWorld2Service.class); String param = "12"; helloworldService.sayHello2(param); } }<aop:aspectj-autoproxy/><bean id="helloWorld2Service" class="com.boventech.learning.serviceImpl.HelloWorld2ServiceImpl"/> <bean id="aspect" class="com.boventech.learning.aspect.HelloWorldAspectAnnotation"/> <bean id="aspect2" class="com.boventech.learning.aspect.HelloWorldAspectAnnotation2"/>以上是“@Aspect@Order各个通知的执行顺序是什么”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注编程网行业资讯频道！
