基于Annotation的Spring AOP: @AfterReturning
2013年08月03日 06:20:37
阅读数：7916
AfterReturning 增强处理将在目标方法正常完成后被织入。
使用@AfterReturning可指定如下两个属性：
① pointcut / value : 两者都用于指定该切入点对应的切入表达式
② returning : 指定一个返回值形参名，增强处理定义的方法可通过该行参名来访问目标方法的返回值。
Person.java :
-
public interface Person { -
public String sayHello(String name); -
public void eat(String food); -
}
Chinese.java :
-
import org.springframework.stereotype.Component; -
@Component -
public class Chinese implements Person { -
@Override -
public void eat(String food) { -
System.out.println("我正在吃:"+food); -
} -
@Override -
public String sayHello(String name) { -
System.out.println("sayHello方法被执行了"); -
return name+"Hello,Spring AOP"; -
} -
}
AfterReturningAdviceTest.java :
-
import org.aspectj.lang.annotation.AfterReturning; -
import org.aspectj.lang.annotation.Aspect; -
/** -
* 定义一个切面 -
* @author Administrator -
* -
*/ -
@Aspect -
public class AfterReturningAdviceTest { -
@AfterReturning(returning="rvt",pointcut="execution(* com.bean.*.*(..))") -
public void log(Object rvt){ -
System.out.println("获取目标方法返回值："+rvt); -
System.out.println("模拟记录日志的功能..."); -
} -
}
bean.xml :
-
<?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" -
xmlns:tx="http://www.springframework.org/schema/tx" -
xsi:schemaLocation="http://www.springframework.org/schema/beans -
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd -
http://www.springframework.org/schema/context -
http://www.springframework.org/schema/context/spring-context-2.5.xsd -
http://www.springframework.org/schema/tx -
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd -
http://www.springframework.org/schema/aop -
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd"> -
<context:component-scan base-package="com.bean"> -
<context:include-filter type="annotation" -
expression="org.aspectj.lang.annotation.Aspect"/> -
</context:component-scan> -
<aop:aspectj-autoproxy/> -
</beans>
Test.java :
-
public class Test { -
public static void main(String[] args) { -
ApplicationContext ctx=new ClassPathXmlApplicationContext("bean.xml"); -
Person p=(Person) ctx.getBean("chinese"); -
System.out.println(p.sayHello("张三")); -
p.eat("西瓜"); -
} -
}
运行控制台输出：
