Spring Aop注解实现

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.18</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.3.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.3.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>5.3.4</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.3.4</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</version>
        </dependency>
    </dependencies>

/**
 * @version 1.0
 * @author： crush
 * @date： 2021-03-05 10:26
 */
public interface TestDao {
    public void delete();
}

/**
 * @version 1.0
 * @author： crush
 * @date： 2021-03-05 10:27
 */
@Service
public class TestDaoImpl implements TestDao {
    public void delete() {
        System.out.println("正在执行的方法-->删除");
    }
}

/**
 * @version 1.0
 * @author： crush
 * @date： 2021-03-10 18:04
 */
@Aspect
@Component
public class MyAspectAnnotation {
    @Pointcut("execution(* com.dao.*.*(..))")
    private void myPointCut(){
    }
    /**
     * 前置通知 使用JoinPoint 接口作为参数获得目标对象的信息
     *    @Before("myPointCut()") ==
     *    <aop:after method="after" pointcut-ref="myPointCut"/>
     **/
    @Before("myPointCut()")
    public void before(JoinPoint jp){
        System.out.print("前置通知：模拟权限控制");
        System.out.println("目标对象："+jp.getTarget()+",被增强的方法："+jp.getSignature().getName());
    }
    @AfterReturning("myPointCut()")
    public void afterReturning(JoinPoint jp){
        System.out.print("后置返回通知："+"模拟删除临时文件");
        System.out.println(",被增强的方法"+jp.getSignature().getName());
    }
    @Around("myPointCut()")
    public Object around(ProceedingJoinPoint pjp) throws Throwable {
        System.out.println("环绕开始：执行目标方法前，模拟开启事务");
        Object obj = pjp.proceed();
        System.out.println("环绕结束：执行目标方法后，模拟关闭事务");
        return obj;
    }
    @AfterThrowing(value = "myPointCut()",throwing = "throwable")
    public void except(Throwable throwable){
        System.out.println("异常通知："+"程序执行异常"+throwable.getMessage());
    }

    @After("myPointCut()")
    public void after(){
        System.out.println("最终通知：释放资源");
    }

}

<?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
       http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
        <context:component-scan base-package="com.dao"/>
        <context:component-scan base-package="com.aspect"/>
        <!--启动基于注解的AspectJ支持-->
        <aop:aspectj-autoproxy proxy-target-class="true"/>
</beans>

    @Test
    public void Test(){
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("applicationContext.xml");
        TestDao testDao = applicationContext.getBean("testDaoImpl", TestDaoImpl.class);
        testDao.delete();
        /**
         * 输出：
         * 环绕开始：执行目标方法前，模拟开启事务
         * 前置通知：模拟权限控制目标对象：com.dao.TestDaoImpl@2bef51f2,被增强的方法：delete
         * 正在执行的方法-->删除
         * 后置返回通知：模拟删除临时文件,被增强的方法delete
         * 最终通知：释放资源
         * 环绕结束：执行目标方法后，模拟关闭事务
         */
    }