spring aop 使用注解方式总结

spring aop的注解方式：和xml的配置方式略有区别，详细如下：

1、首先还是建立需要的切面类：切面类里面定义好切点配置，以及所有的需要实现的通知方法。

/**
*
*/
package com.lilin.maven.service.annotationaop;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Service;

/**
* @author lilin
*
*/
@Aspect
@Service
public class AspectAop {

/**
* 申明切点，同时配置将要被aop过滤的业务类
*/
@Pointcut("execution (* com.lilin.maven.service.annotationaop.UserService.addUser(..))")
public void pointcut() {
}

@Before("pointcut()")
public void doBefore() {
System.out.println("doBefore advice");
}

@AfterReturning("pointcut()")
public void doAfterReturning() {
System.out.println("doAfterReturning advice");
}

@After("pointcut()")
public void doAfter() {
System.out.println("doAfter advice");
}

@AfterThrowing("pointcut()")
public void doAfterThrowing() {
System.out.println("doAfterThrowing advice");
}

@Around("pointcut()")
public Object doAround(ProceedingJoinPoint pjp) throws Throwable {
System.out.println("doAround advice start");
Object result = pjp.proceed();
System.out.println("doAround advice end");
return result;
}

}

2、在spring的配置文件中，开启注解的扫描：

<?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.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> 
<!-- 配置注解扫面路径 -->
<context:component-scan base-package="com.lilin" />
<!-- 开启注解 -->
<context:annotation-config />
<!-- 开启aspectj代理 -->
<aop:aspectj-autoproxy />
</beans>

3、建立业务的接口和类，方便aop的过滤测试。

/**
*
*/
package com.lilin.maven.service.annotationaop;

/**
* @author lilin
*
*/
public interface IUserService {
void addUser();
}

/**
*
*/
package com.lilin.maven.service.annotationaop;

import org.springframework.stereotype.Service;

/**
* @author lilin
*
*/
@Service
public class UserService implements IUserService {
@Override
public void addUser() {
System.out.println("增加用户信息");
　　　　　//这个异常信息的抛出，是为了测试after throwing的advice的
throw new RuntimeException("测试异常");
}

}

4、还是像xml配置的时候类似，建立testNG的测试类：继承的baseTest 和xml配置的中一样，请参见上一篇xml配置中的baseTest

/**
*
*/
package com.lilin.maven.service.annotationaop;

import javax.annotation.Resource;

import org.springframework.test.context.ContextConfiguration;
import org.testng.annotations.Test;

import com.lilin.maven.service.BaseTest;

/**
* @author lilin
*
*/
@ContextConfiguration(locations = { "classpath:/config/spring/spring-aopannotation.xml" })
public class AopAnnotationTest extends BaseTest {

@Resource
private IUserService userService;

@Test
public void aopAnnotationTest() {
userService.addUser();
}

}

5、运行测试方法，可以得到注解方式的aop配置已经起到作用：

正常的测试结果如下：

2016-1-29 15:25:09 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [config/spring/spring-aopannotation.xml]
2016-1-29 15:25:09 org.springframework.context.support.AbstractApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.GenericApplicationContext@10f6d3: startup date [Fri Jan 29 15:25:09 CST 2016]; root of context hierarchy
2016-1-29 15:25:09 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@10721b0: defining beans [aspectAop,userService,light,lightOnCommand,remoteControl,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy
doAround advice start
doBefore advice
增加用户信息
doAround advice end
doAfter advice
doAfterReturning advice
PASSED: aopAnnotationTest

===============================================
Default test
Tests run: 1, Failures: 0, Skips: 0
===============================================

@AfterThrowing 的测试结果如下，测试这个，请手动在业务方法里面抛出异常信息：

2016-1-29 15:26:50 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [config/spring/spring-aopannotation.xml]
2016-1-29 15:26:50 org.springframework.context.support.AbstractApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.GenericApplicationContext@10f6d3: startup date [Fri Jan 29 15:26:50 CST 2016]; root of context hierarchy
2016-1-29 15:26:50 org.springframework.beans.factory.support.DefaultListableBeanFactory preInstantiateSingletons
信息: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@10721b0: defining beans [aspectAop,userService,light,lightOnCommand,remoteControl,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy
doAround advice start
doBefore advice
增加用户信息
doAfter advice
doAfterThrowing advice
FAILED: aopAnnotationTest
java.lang.RuntimeException: 测试异常
at com.lilin.maven.service.annotationaop.UserService.addUser(UserService.java:17)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

好了，到此，spring aop的注解方式的实现，一个简单的demo就o了。