javaee spring 测试aop 切面-编程知识

切面类

package com.test.advice;import org.aspectj.lang.ProceedingJoinPoint;//增强类
public class MyAdvice {//将这个增强方法切入到service层的add方法前public void before(){System.out.println("添加用户之前");}}

目标类

package com.test.service;public interface IUsersService {public void add();public void update();public void delete();
}

package com.test.service.impl;import com.test.service.IUsersService;
import org.springframework.stereotype.Service;@Service
public class UsersService implements IUsersService {@Overridepublic void add()  {System.out.println("添加用户...");}@Overridepublic void update() {System.out.println("修改用户...");}@Overridepublic void delete() {System.out.println("删除用户...");}
}

spring配置文件

<?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"xmlns:context="http://www.springframework.org/schema/context"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"><!--开启包的扫描 --><context:component-scan base-package="com.test" /><!-- 创建增强类对象 --><bean id="myAdvice" class="com.test.advice.MyAdvice" /><!-- 织入 --><aop:config><!-- 定义切点--><aop:pointcut id="pc" expression="execution(* com.test.service.impl.*.add(..))" /><!--切入 --><aop:aspect ref="myAdvice"><!-- 将增强类对象myAdvice中的before方法切入到pc对应的切点所在的方法前面 --><aop:before method="before" pointcut-ref="pc" /></aop:aspect></aop:config></beans>

依赖

<?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>org.example</groupId><artifactId>testSpring06</artifactId><version>1.0-SNAPSHOT</version><packaging>war</packaging><name>testSpring06 Maven Webapp</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>1.7</maven.compiler.source><maven.compiler.target>1.7</maven.compiler.target></properties><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><!-- Spring --><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>4.3.18.Release</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>4.3.18.Release</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>4.3.18.Release</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>4.3.18.Release</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>4.3.18.RELEASE</version></dependency><!-- aop --><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.8.10</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>4.3.18.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>4.3.18.RELEASE</version></dependency></dependencies><build><finalName>testSpring06</finalName><pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --><plugins><plugin><artifactId>maven-clean-plugin</artifactId><version>3.1.0</version></plugin><!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --><plugin><artifactId>maven-resources-plugin</artifactId><version>3.0.2</version></plugin><plugin><artifactId>maven-compiler-plugin</artifactId><version>3.8.0</version></plugin><plugin><artifactId>maven-surefire-plugin</artifactId><version>2.22.1</version></plugin><plugin><artifactId>maven-war-plugin</artifactId><version>3.2.2</version></plugin><plugin><artifactId>maven-install-plugin</artifactId><version>2.5.2</version></plugin><plugin><artifactId>maven-deploy-plugin</artifactId><version>2.8.2</version></plugin></plugins></pluginManagement></build>
</project>

测试类

package com.test.testAop;//import com.test.service.IItemsService;
import com.test.service.IUsersService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;public class TestAop {@Testpublic void test(){ApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml");IUsersService usersServiceProxy=applicationContext.getBean("usersService", IUsersService.class);try {usersServiceProxy.add();} catch (Exception e) {e.printStackTrace();}}