简单的Spring AOP，但Aspect不会被触发

Question

我正在尝试练习 Spring AOP。问题是，我的程序不是我所期望的。

Aspect 工作时应该看起来像这样。

Sep 27, 2020 1:11:11 PM aspects.LoggingAspect log
INFO: Method will execute
Sep 27, 2020 1:11:11 PM com.cms.services.CommentService publishComment
INFO: Publishing comment:Demo comment
Sep 27, 2020 1:11:11 PM aspects.LoggingAspect log
INFO: Method executed

但是，它不会记录。就像方面根本不起作用。

com.cms.services.CommentService publishComment
INFO: Publishing Comment: Demo Comment

Main.java使用Instance spring Spring Context执行整体代码 并且还使用 CommentService.java.

CommentService.java只不过是打印一行日志。 它位于 services 包下。

然后是LoggingAspect.java用于切面编程。

最后，CommentConfig.java用于配置EnableAspectJAutoProxy并为Aspect类注册Bean。

这是我的代码。

Main.java

public class Main {
    public static void main(String[] args) {
        var c = new AnnotationConfigApplicationContext(CommentConfig.class);
        var service = c.getBean(CommentService.class);

        Comment comment = new Comment();
        comment.setText("Demo Comment");
        comment.setAuthor("Natasha");

        service.publishComment(comment);
    }
}

CommentService.java

@Service
public class CommentService {

    private Logger logger = Logger.getLogger(CommentService.class.getName());
    public void publishComment(Comment comment) {
        logger.info("Publishing Comment: " + comment.getText());
    }
}

LoggingAspect.java

@Aspect
@Component
public class LoggingAspect {

    private Logger logger = Logger.getLogger(LoggingAspect.class.getName());

    @Around("execution(* services.*.*(..))")
    public void log(ProceedingJoinPoint joinPoint) throws Throwable {
        System.out.println("method will execute");
            logger.info("Method will execute");
            joinPoint.proceed();
            logger.info("Method has executed");
        System.out.println("method has executed");
    }
}

CommentConfig.java

@Configuration
@ComponentScan(basePackages = {"com.cms"})
@EnableAspectJAutoProxy
public class CommentConfig {
    @Bean
    public LoggingAspect aspect() {
        return new LoggingAspect();
    }
}

另外，这是我的依赖。

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.23</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.3.23</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-aop -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.3.24</version>
        </dependency>

无法弄清楚缺少什么...

Answer 1

尝试对 LoggingAspect

进行简单修改

@Around("within(*..services..*)")
public Object log(ProceedingJoinPoint joinPoint) throws Throwable {
    System.out.println("method will execute");
    logger.info("Method will execute");
    Object proceed = joinPoint.proceed();
    logger.info("Method has executed");
    System.out.println("method has executed");
    return proceed;
}