【Spring五】AOP之使用注解配置

xmlns:context="http://www.springframework.org/schema/context"

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-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/aop

          http://www.springframework.org/schema/aop/spring-aop-2.5.xsd" >

<!--

1、把所有的bean放入到spring容器中,启动类扫描机制的注解

2、启动AOP的注解

-->

<context:component-scan base-package="cn.itheima03.spring.aop.annotation" ></context:component-scan>

<aop:aspectj-autoproxy></ aop:aspectj-autoproxy>

</beans>

@Repository("classesDao" )

public class ClassesDaoImpl extends HibernateUtils implements ClassesDao{

public String
saveClasses(Classes classes) {

sessionFactory.getCurrentSession().save(classes);

return "aaaa" ;

}

public List<Classes>
getClasses() {

return sessionFactory .getCurrentSession().createQuery("from
Classes").list();

}

public void updateClasses(Classes
classes) {

sessionFactory.getCurrentSession().update(classes);

}

}

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/**

* @Aspect该注解说明该类是一个切面类 ,等效于：

* <aop:aspect ref="myTransaction">

*   <aop:pointcut expression="execution(* cn.itheima03.spring.aop.annotation.ClassesDaoImpl.*(..))"

*         id=" aa()"/>

* </aop:aspect>

*/

@Component("myTransaction" )

@Aspect

public class MyTransaction extends HibernateUtils{

private Transaction transaction;

@Pointcut("execution(*
cn.itheima03.spring.aop.annotation.ClassesDaoImpl.*(..))")

private void aa(){} //方法签名  
方法的修饰符最好为private,返回值必须是void

@Before("aa()")

public void beginTransaction(){

this.transaction = sessionFactory.getCurrentSession().beginTransaction();

}

@AfterReturning( "aa()")

public void commit(){

this.transaction .commit();

}

}