Spring 使用xml配置AOP的过程详解

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.3.29</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.9.7</version>
    </dependency>
</dependencies>    

@Service
public class StudentService {
    public void insert(){
        System.out.println("StudentService中的insert方法");
    }
}

@Component
public class Aspect {
    @Pointcut("execution(* com.example.service..*.*(..)")
    public void pt(){
        System.out.println("");
    }
    public void methodBefore(JoinPoint joinPoint){
        Object[] args = joinPoint.getArgs();
        Object target = joinPoint.getTarget();
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        System.out.println("Before");
    }
}

<context:component-scan base-package="com.example">
</context:component-scan>

    <aop:config>
        <!--定义切面-->
        <aop:pointcut id="pt" expression="execution(* com.example.service..*.*(..))"/>
        <!--配置切面-->
        <aop:aspect ref="aspect">
            <!--配置通知类型-->
            <!-- <aop:before method="methodBefore" pointcut-ref="pt"/> -->
            <aop:before method="methodBefore" pointcut="com.example.aspect.Aspect.pt()"/>
        </aop:aspect>
    </aop:config>

@AfterReturning(value = "point()",returning = "ret")
public void methodAfterReturning(JoinPoint joinPoint, Object ret){
	// 方法体
}
@AfterThrowing(value = "point()",throwing = "e")
public void methodAfterThrowing(JoinPoint joinPoint,Throwable e){
	// 方法体
}

@Component
public class Aspect {
    @Pointcut("execution(* com.example.service..*.*(..))")
    public void pt(){
        System.out.println("");
    }
    public void methodBefore(JoinPoint joinPoint){
        Object[] args = joinPoint.getArgs();
        Object target = joinPoint.getTarget();
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        System.out.println("Before");
    }    
    public void methodAfterReturning(JoinPoint joinPoint, Object ret){
        System.out.println("AfterReturning: "+ ret);
    }
}

<aop:aspect ref="aspect">
    <!--配置通知类型-->
    <!-- <aop:before method="methodBefore" pointcut-ref="pt"/> -->
    <aop:before method="methodBefore" pointcut="com.example.aspect.Aspect.pt()"/>
    <aop:after-returning method="methodAfterReturning" pointcut-ref="pt" returning="ret"/>
</aop:aspect>