基于注解声明式AspectJ技术

注解？
1-导入spring-aop包和aspectjweaver包

2-创建Teacher接口和实现类：添加注解@Repository(“id”)

package p313.aop.annotation;public interface Teacher {//上课教书public void teach();}

package p313.aop.annotation;import org.springframework.stereotype.Repository;@Repository(\"teacher\")public class TeacherImpl implements Teacher {@Overridepublic void teach() {System.out.println(\"老师上课进行中\");}}

3-创建切面类：添加注解@Aspect @Component和定义前置后置增前和切点

package p313.aop.annotation;import org.aspectj.lang.annotation.After;import org.aspectj.lang.annotation.Aspect;import org.aspectj.lang.annotation.Before;import org.aspectj.lang.annotation.Pointcut;import org.springframework.stereotype.Component;@Aspect@Componentpublic class MyAspect {//定义一个方法：要求返回类型为void,方法体为空,参数列表为空@Pointcut(\"execution(* p313.aop.annotation.*.*(..))\")public void myPointCut(){}//需要代理的方法：点名@Before(\"myPointCut()\")public void callName(){System.out.println(\"点名\");}//收发作业@After(\"myPointCut()\")public void collectHomework(){System.out.println(\"收发作业\");}}

4-在配置文件中配置

<!--扫描包，是注解生效--><context:component-scan base-package=\"p313.aop.annotation\"/><!--开启aspectj的支持--><aop:aspectj-autoproxy/>

5-测试

@Testpublic void test1(){//获得配置文件ApplicationContext applicationContext =new ClassPathXmlApplicationContext(\"p313/aop/annotation/applicationContext.xml\");//获得teacher对象Teacher teacher= (Teacher) applicationContext.getBean(\"teacher\");//调用教书方法teacher.teach();}