Spring Aop xml实现

导宝

<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.9.4</version>
    </dependency>

第一种方式

接口

public interface UserService {
     void add();
     void delete();
     void update();
     void select();

}

实现类

public class UserServiceImpl implements UserService{
    @Override
    public void add() {
        System.out.println("增加一个用户");
    }
    @Override
    public void delete() {
        System.out.println("删除一个用户");

    }
   @Override
    public void update() {
        System.out.println("修改一个用户");
    }
    @Override
    public void select() {
        System.out.println("查询一个用户");
    }
}

日志插入类

public class AfterLog implements AfterReturningAdvice {


    @Override
    public void afterReturning(Object returnValue, Method method, Object[] args, Object target) throws Throwable {
        System.out.println("执行了" + method.getName()+"方法，返回的结果为" + returnValue);
    }
}
public class Log implements MethodBeforeAdvice {


    //method:执行的目标对象的方法
    //args： 参数
    //target： 目标对象
    @Override
    public void before(Method method, Object[] args, Object target) throws Throwable {
        System.out.println(target.getClass().getName()+"的"+method.getName()+"被执行了");
    }
}

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: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/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">


    <bean id="userservice" class="com.gmy.service.UserServiceImpl"></bean>
    <bean id="log" class="com.gmy.log.Log"></bean>
    <bean id="afterlog" class="com.gmy.log.AfterLog"></bean>

<!--    方式一：使用原生Spring API接口-->
<!--    配置aop：需要导入aop的约束-->
    <aop:config >
<!--        切入点   expression(要执行的位置)-->
        <aop:pointcut id="pointcut" expression="execution(* com.gmy.service.UserServiceImpl.*(..))"/>

<!--        执行环绕增加-->
        <aop:advisor advice-ref="log" pointcut-ref="pointcut"></aop:advisor>
        <aop:advisor advice-ref="afterlog" pointcut-ref="pointcut"></aop:advisor>
    </aop:config>

</beans>

测试类

public class MyTest {


    @Test
    public void test1(){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");

        //动态代理的是接口
        //UserServiceImpl user = (UserServiceImpl) context.getBean("userservice");

        UserService user = context.getBean(UserService.class);

        user.delete();
    }
}

方式二：

插入类

public class Diypoincut {

    public void before(){
        System.out.println("插入前");
    }

    public void after(){
        System.out.println("插入后");
    }

}

       方式二：自定义类
    <bean id="diy" class="com.gmy.diy.Diypoincut"></bean>
    
    <aop:config>
<!--        自定义切面  ref 要引用的类-->
        <aop:aspect ref="diy">
            <!--        切入点-->
            <aop:pointcut id="point" expression="execution(* com.gmy.service.UserServiceImpl.*(..))"/>
<!--            通知-->
            <aop:before method="before" pointcut-ref="point"></aop:before>
            <aop:after method="after" pointcut-ref="point"></aop:after>
        </aop:aspect>
    </aop:config>

方式三：

@Aspect //标注这个类是一个切面
public class AnnotationPoinCut {

    @Before("execution(* com.gmy.service.UserServiceImpl.*(..))")
    public void before(){
        System.out.println("方法执行前");
    }


    @Around("execution(* com.gmy.service.UserServiceImpl.*(..))")
    public void around(ProceedingJoinPoint jp) throws Throwable {

        System.out.println("环绕前");
        //执行方法
        Object proceed = jp.proceed();
        System.out.println("环绕后");
        //System.out.println(proceed);

        //Signature signature = jp.getSignature();//获得签名
        //System.out.println("signature:" + signature);


    }
}

<?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: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/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">


    <bean id="userservice" class="com.gmy.service.UserServiceImpl"></bean>
    <bean id="log" class="com.gmy.log.Log"></bean>
    <bean id="afterlog" class="com.gmy.log.AfterLog"></bean>

    <bean id="annotationpoinCut" class="com.gmy.diy.AnnotationPoinCut"></bean>

<!--    注解支持-->
    <aop:aspectj-autoproxy></aop:aspectj-autoproxy>