使用Spring框架入门三：基于XML配置的AOP的使用

一、引入Jar包

        <!--测试1使用-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <!--测试2、3、4、5、6使用-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.0.5.RELEASE</version>
        </dependency>
        <!--测试Aop使用-->
        <!-- https://mvnrepository.com/artifact/org.aspectj/aspectjweaver -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.1</version>
        </dependency>

注意，如果不引入aspectjweaver包，会报找不到类的错误。

二、测试步骤

1、新建切入点类（JoinPoint）：

package aoptest1;

public class MyWorker {
    public void aopPointMethod1() {
        System.out.println("this is aopPointMethod1 executed.");
    }
}

2、建立增强类（Advice）

package aoptest1;

import org.aspectj.lang.ProceedingJoinPoint;

public class MyWorkerExtension {
    public void aopInspectAtBefore() {
        System.out.println("this is aopInspectAtBefore method execute.");
    }

    public void aopInspectAtAfter() {
        System.out.println("this is aopInspectAtAfter method execute.");
    }

    public void aopAround(ProceedingJoinPoint proceedingJoinPoint) {
        try {
            System.out.println("aopAround1");
            proceedingJoinPoint.proceed();
            System.out.println("aopAround2");
        } catch (Throwable throwable) {
            throwable.printStackTrace();
        }
    }
}

3、建立配置文件在resources下：applicationContextAopTest1.xml

<?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
       http://www.springframework.org/schema/aop/spring-aop.xsd">
    <context:component-scan base-package="aoptest1"/>
    <!--配置实体-->
    <bean id="myworker1" class="aoptest1.MyWorker"/>
    <bean id="myworkerExtension1" class="aoptest1.MyWorkerExtension"/>
    <!--配置AOP-->
    <aop:config>
        <!--配置切入点-->
        <aop:pointcut expression="execution(* aoptest1.MyWorker.aopPointMethod1(..))" id="aopPointMethod1PointCut"/>
        <!--配置切面-->
        <aop:aspect ref="myworkerExtension1">
            <aop:before method="aopInspectAtBefore" pointcut-ref="aopPointMethod1PointCut"/>
            <aop:after method="aopInspectAtAfter" pointcut-ref="aopPointMethod1PointCut"/>
            <aop:around method="aopAround" pointcut-ref="aopPointMethod1PointCut"/>
        </aop:aspect>

    </aop:config>
</beans>

4、测试

import aoptest1.MyWorker;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class AopTest {
    @Test
    public void aopTest1() {
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContextAopTest1.xml");
        MyWorker mywoker = context.getBean(MyWorker.class);
        mywoker.aopPointMethod1();
    }
}

5、测试结果

this is aopInspectAtBefore method execute.
aopAround1
this is aopPointMethod1 executed.
aopAround2
this is aopInspectAtAfter method execute.