浅析Spring基于注解的AOP

<!-- spring-aspects会帮我们传递过来aspectjweaver -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>5.3.1</version>
</dependency>

@Component
@Aspect //将当前组件标识为切面
public class LoggerAspect {
    @Before("execution(public int com.tian.spring.aop.annotation.CalculatorImpl.add(int,int))")
    public void beforeAdviceMethod() {
        System.out.println("LoggerAspect,前置通知");
    }
}

    <!--
        AOP的注意事项：
        切面类和目标类都需要交给IOC容器管理
        切面类必须通过@Aspect注解标识为一个切面
        在Spring的配置文件中设置<aop:aspectj-autoproxy />开启基于注解的AOP
    -->
    <context:component-scan base-package="com.tian.spring.aop.annotation"></context:component-scan>
    <!--开启基于注解的AOP-->
    <aop:aspectj-autoproxy/>

public class AOPTest {
    @Test
    public void testAOPByAnnotation() {
        ApplicationContext ioc = new ClassPathXmlApplicationContext("aop-annotation.xml");
        Calculator calculator = ioc.getBean(Calculator.class);
        calculator.add(1,2);
    }
}

@Component
@Aspect //将当前组件标识为切面
public class LoggerAspect {
//    @Before("execution(public int com.tian.spring.aop.annotation.CalculatorImpl.add(int,int))")
    @Before("execution(* com.tian.spring.aop.annotation.*.*(..))")
    public void beforeAdviceMethod() {
        System.out.println("LoggerAspect,前置通知");
    }
}

public class AOPTest {
    @Test
    public void testAOPByAnnotation() {
        ApplicationContext ioc = new ClassPathXmlApplicationContext("aop-annotation.xml");
        Calculator calculator = ioc.getBean(Calculator.class);
        calculator.sub(1,2);
    }
}

//    @Before("execution(public int com.tian.spring.aop.annotation.CalculatorImpl.add(int,int))")
//    @Before("execution(* com.tian.spring.aop.annotation.*.*(..))")
    @Pointcut("pointCut()")
    public void beforeAdviceMethod(JoinPoint joinPoint) {
        //获取连接点所对应方法的签名信息
        Signature signature = joinPoint.getSignature();
        //获取连接点所对应方法的参数
        Object[] args = joinPoint.getArgs();
        System.out.println("LoggerAspect,方法：" + signature.getName() + ",参数" + Arrays.toString(args));
    }

    @Pointcut("execution(* com.tian.spring.aop.annotation.CalculatorImpl.*(..))")
    public void pointCut() {
    }

    @After("pointCut()")
    public void afterAdviceMethod() {
    }