一、导入相关的Jar包

导入的Jar包有

spring-aop、spring-context、aspectjweaver

pom.xml文件

<?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>
  <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.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>5.0.6.RELEASE</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.9.1</version>
    </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

通过注解的方式实现切面

import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;

@Aspect
public class Audience {
    @Before("execution(* com.zbt.day01.Performance.perform(..))")
    public void silenceCellphones(){
        System.out.println("观众手机静音");
    }
    @Before("execution(* com.zbt.day01.Performance.perform(..))")
    public void takeSeats(){
        System.out.println("观众入座");
    }
    @AfterReturning("execution(* com.zbt.day01.Performance.perform(..))")
    public void applause(){
        System.out.println("观众鼓掌");
    }

    @AfterThrowing("execution(* com.zbt.day01.Performance.perform(..))")
    public void demandRefund(){
        System.out.println("观众要求退款");
    }
}

三、编写切点

package com.zbt.day01;

public class Performance {

    public void perform(){
        System.out.println("表演开始了");
    }
}

四、使用XML配置的方式装配Bean

<?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">
    <aop:aspectj-autoproxy/>

    <bean id="performance" class="com.zbt.day01.Performance"></bean>

    <bean id="audience" class="com.zbt.day01.Audience"></bean>

</beans>

五、测试

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

public class TestI {
    @Test
    public void testPerformance(){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationConfig.xml");
        Performance performance = context.getBean("performance",Performance.class);
        performance.perform();
    }
}

输出结果

观众手机静音
观众入座
表演开始了
观众鼓掌

六、参考

1、《Spring实战-Spring in Action》-张卫滨