一、 导入相关的Jar包
spring-aop、aspectjweaver、spring-context、junit
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.zbt</groupId>
<artifactId>spring_aop</artifactId>
<version>1.0-SNAPSHOT</version>
<name>spring_aop</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>5.0.8.RELEASE</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.6.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
</build>
</project>
二、编写切面
2.1、切面一:Cousin
package com.zbt.day02;
public class Cousin {
public void dinner(){
System.out.println("表哥请我吃晚饭");
}
}
2.2、切面二:Interviewer
package com.zbt.day02;
public class Interviewer {
public void notice(){
System.out.println("不好意思,公司没有符合你的岗位");
}
}
三、编写切点
package com.zbt.day02;
public class Experience {
public void intershipInterview(){
System.out.println("参加实习生面试");
}
public void priorityRecruitment(){
System.out.println("参加优招面试");
}
}
四、使用XML配置切面
<?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">
<bean id="experience" class="com.zbt.day02.Experience"></bean>
<bean id="cousin" class="com.zbt.day02.Cousin"></bean>
<bean id="interviewer" class="com.zbt.day02.Interviewer"></bean>
<aop:config>
<aop:aspect id="cousinAspect" ref="cousin">
<aop:before pointcut="execution(* com.zbt.day02.Experience.intershipInterview(..))" method="dinner"/>
<aop:after pointcut="execution(* com.zbt.day02.Experience.priorityRecruitment(..))" method="dinner"/>
</aop:aspect>
<aop:aspect id="interviewerAspect" ref="interviewer">
<aop:after pointcut="execution(* com.zbt.day02.Experience.intershipInterview(..))" method="notice"/>
<aop:after pointcut="execution(* com.zbt.day02.Experience.priorityRecruitment(..))" method="notice"/>
</aop:aspect>
</aop:config>
</beans>
注意我们这里没有使用下面的自动代理方案,从Spring的官方文档中描述:aop-config配置模式已经heavy use 了auto_proxy机制,因此我们对于如果我们使用aop:config的方式的话,那么我们就不需要使用下面的方式开启自动代理了,两种方式最好二选一。
<aop:aspectj-autoproxy/>
五、测试
package com.zbt.day02;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
public class TestExperience {
@Test
public void testExp(){
ApplicationContext context = new ClassPathXmlApplicationContext("applicationConfig.xml");
Experience experience = context.getBean("experience",Experience.class);
experience.intershipInterview();
experience.priorityRecruitment();
}
}
输出结果
表哥请我吃晚饭
参加实习生面试
不好意思,公司没有符合你的岗位
参加优招面试
不好意思,公司没有符合你的岗位
表哥请我吃晚饭
从输出结果来看没有错,我在调用Experience.internshipInterview()方法之前执行了Cousin.dinner()方法在Experience.internshipInterview()方法之后执行了Interviewer.notic()方法。在调用Experience.priorityRecruitment()方法执行以后执行了Cousin.dinner()方法和Interviewer.notic()方法。但是我们不嫰确定我们哪一个通知应该优先执行。(?难道不能自己确定在after之后那个advice优先执行吗?)