Spring and AOP

作为AOP入门基础的学习材料，大家可以参考这个。
@AspectJ Based AOP with Spring
我自己是参考《Spring实战》的。

不废话，先贴上代码：

<dependency>    <groupId>org.aspectj</groupId>    <artifactId>aspectjrt</artifactId>    <version>1.8.10</version></dependency><dependency>    <groupId>org.aspectj</groupId>    <artifactId>aspectjweaver</artifactId>    <version>1.8.10</version></dependency>

接下来是切面（切点+通知）

package com.banana.oa.aop;import org.aspectj.lang.annotation.AfterReturning;import org.aspectj.lang.annotation.AfterThrowing;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;import org.slf4j.Logger;import org.slf4j.LoggerFactory;@Aspectpublic class Audience {    private static Logger logger = LoggerFactory.getLogger(Audience.class);    @Pointcut("execution(* com.banana.oa.aop.Performance.perform(..))")    public void performance() {}    @Before("performance()")    public void silenceCellPhone() {        logger.info("silence cell phone");    }    @Before("performance()")    public void takeSeats() {        logger.info("take seats");    }    @AfterReturning("performance()")    public void applause() {        logger.info("CLAP CLAP CLAP");    }    @AfterThrowing("performance()")     public void demandRefund() {        logger.info("Demanding a refund");    }}

切点的具体类：

package com.banana.oa.aop;import org.slf4j.Logger;import org.slf4j.LoggerFactory;public class Performance {    private static final Logger logger = LoggerFactory.getLogger(Performance.class);    public void perform() {        logger.info("perform ...");    }}

Bean配置，我自己比较喜欢使用Java配置，而且类型也跟安全。需要注意的是要加上@EnableAspectJAutoProxy 注解。

package com.banana.oa.spring;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;import org.springframework.context.annotation.EnableAspectJAutoProxy;import com.banana.oa.aop.Audience;import com.banana.oa.aop.Performance;@Configuration@EnableAspectJAutoProxypublic class AopConfig {    @Bean    public Audience audience() {        return new Audience();    }    @Bean    public Performance performance() {        return new Performance();    }}

Unit Test类，需要注意的是，这里的Performance需要通过注入的方式装配进来，自己new的对象会达不到AOP效果。

package com.banana.oa.service;import org.junit.Test;import org.springframework.beans.factory.annotation.Autowired;import com.banana.oa.aop.Performance;public class PerformanceTest extends BaseTest {    /*     * AOP test     * must be provided in inject way, otherwise AOP won't work if we new a Performance object     */    @Autowired    private Performance performance;    @Test    public void testPerform() {        performance.perform();    }}