Spring-AOP实例

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需求类：

PersonDao类：接口

PersonDaoImpl类：实现类

Transaction类：事务类

TransactionTest类：测试类

applicationContext.xml：配置文件

PersonDao：

package com.tgb.spring.aop.xml.transaction;public interface PersonDao {  public void savePerson();}

PersonDaoImpl：

package com.tgb.spring.aop.xml.transaction;public class PersonDaoImpl implements PersonDao {public void savePerson() {System.out.println("执行： save person 方法！");}}

Transaction：

package com.tgb.spring.aop.xml.transaction;import java.lang.reflect.Method;import org.junit.Test;/** *  * @author F-mdh * *///切面public class Transaction {   public void  beginTransaction(){   System.out.println("执行：开启事务！");      };   public void  commitTransaction(){   System.out.println("执行：提交事务！");      };   }

TransactionTest：

package com.tgb.spring.aop.xml.transaction;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class TransactionTest {@Testpublic void testTransaction(){                                   //applicationContext.xmlApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");PersonDao personDao=(PersonDao)context.getBean("personDao");personDao.savePerson();};}

applicationContext.xml：

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"   xmlns:aop="http://www.springframework.org/schema/aop"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xsi:schemaLocation="http://www.springframework.org/schema/beans            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd           http://www.springframework.org/schema/aop            http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">  <bean id="personDao" class="com.tgb.spring.aop.xml.transaction.PersonDaoImpl"></bean>  <bean id="transaction" class="com.tgb.spring.aop.xml.transaction.Transaction"></bean>    <aop:config>  <!--   切入点表达式  确定目标类   -->  <aop:pointcut   expression="execution(* com.tgb.spring.aop.xml.transaction.PersonDaoImpl.*(..))"   id="perform"/>  <!--   ref指向的对象就是切面   -->      <aop:aspect ref="transaction">      <aop:before method="beginTransaction" pointcut-ref="perform"/>      <aop:after-returning method="commitTransaction" pointcut-ref="perform"/>      </aop:aspect>  </aop:config></beans>

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