03、spring Aop注解入门配置

AOP概念：spring aop称为切面编程，通过编译方式和运行期动态代理实现程序功能应用的一种技术；其目的是降低程序间部件的耦合度，提高可复用性。

1、导入依赖

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.3.7</version>
    </dependency>
    <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.9.6</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>5.3.7</version>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
</dependencies>

2、创建连接点服务层业务

服务接口：

public interface Myservice {
    public abstract void save();
}

服务实现类

@Service
public class MyServiceImpl implements MyService {

    @Override
    public void save() {
        System.out.println("保存业务");
    }

}

3、创建增强类

@Component("logger")
@Aspect
public class Logger {

    @Pointcut("execution(* com.boat.service..*.*(..))")
    private void pintcut(){ }

    @Before("pintcut()")
    public void befoerLog(){
        System.out.println("前置通知....");
    }

    @AfterReturning("pintcut()")
    public void afterReturningLog(){
        System.out.println("后置通知....");
    }

    @AfterThrowing("pintcut()")
    public void afterThrowing(){
        System.out.println("异常通知....");
    }

    @After("pintcut()")
    public void afterLog(){
        System.out.println("最终通知....");
    }
}

4、配置bean.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">

    <!--启用注解扫描器配置-->
    <context:component-scan base-package="com.boat"></context:component-scan>

    <!--启用aop注解自动配置-->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

</beans>

5、编写测试类

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:service.xml")
public class TestSpring {

    @Autowired()
    private MyService myService;

    @Test
    public void sho(){
        myService.save();
    }
    
}

运行结果为：