详解在Spring中如何使用AspectJ来实现AOP

<dependency>
 <groupId>org.aspectj</groupId>
 <artifactId>aspectjrt</artifactId>
 <version>${aspectj.version}</version>
</dependency>
<dependency>
 <groupId>org.aspectj</groupId>
 <artifactId>aspectjweaver</artifactId>
 <version>${aspectj.version}</version>
</dependency>
<dependency>
 <groupId>org.aspectj</groupId>
 <artifactId>aspectjtools</artifactId>
 <version>${aspectj.version}</version>
</dependency>
<dependency>
 <groupId>aopalliance</groupId>
 <artifactId>aopalliance</artifactId>
 <version>${aopalliance.version}</version>
</dependency>

public class PreRentAspect {
 /**
  * 增强逻辑
  */
 @Before("execution(* rent(..))")//定义切点与增强类型
 public void beforeRent() {
  System.out.println("开始执行租赁动作");
 }
}

AspectJProxyFactory factory = new AspectJProxyFactory();

//设置目标类
factory.setTarget(new User());

//添加切面类
factory.addAspect(PreRentAspect.class);

User proxy = factory.getProxy();
String userId = "001";
proxy.rent(userId);
proxy.back(userId);

<!-- 目标类-->
<bean id="user" class="net.deniro.spring4.aspectj.User"/>

<!-- 切面类-->
<bean class="net.deniro.spring4.aspectj.PreRentAspect"/>

<!-- 自动创建代理-->
<bean
  class="org.springframework.aop.aspectj.annotation.AnnotationAwareAspectJAutoProxyCreator"/>

ApplicationContext context = new ClassPathXmlApplicationContext(spring.xml");
User user = (User) context.getBean("user");
String userId = "001";
user.rent(userId);
user.back(userId);

<?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"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">

 <!--aspectj 驱动器 -->
 <aop:aspectj-autoproxy/>

 <!-- 目标类-->
 <bean id="user" class="net.deniro.spring4.aspectj.User"/>


 <!-- 切面类-->
 <bean class="net.deniro.spring4.aspectj.PreRentAspect"/>
</beans>