想在Service 層配置事務,Spring 好象是要求必須用接口,因為我沒用接口時沒配置成功.

一個IService 接口.聲明了所有Service層公共的方法,比如save、delete 等。

public interface IService {

????public int count(FindCriteria fc);

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????public List find(FindCriteria fc);

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????public Serializable save(Object object) throws UnsupportedOperationException;

}

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UserService 接口，聲明UserService 的所有方法。還要 extends IService

public interface UserService extends IService {

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????public User login(User user);

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}

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UserService接口的實現類.

public class UserServiceImpl implements UserService {

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????/**

???? * 登錄

???? *

???? * @param user

???? * @return 校驗成功的User實例

???? */

????public User login(User u) throws UnsupportedOperationException {

????????// throw new UnsupportedOperationException();

????????User user = (User) userDao.get(User.class, u.getId());

????????log.debug("get user is " + user);

????????if (user != null && user.getPassword().equals(u.getPassword()))

????????????return user;

????????return null;

????}

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//其他實現省略…

}

完整的applicationContent.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: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-2.0.xsd

http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd

http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd">

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????<!-- 連接屬性 -->

????<bean id="propertyConfigurer"

????????class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

????????<property name="location" value="WEB-INF/jdbc.properties" />

????</bean>

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????<!-- 數據源 -->

????<bean id="dataSource"

????????class="org.apache.commons.dbcp.BasicDataSource">

????????<property name="driverClassName" value="${jdbc.driver}" />

????????<property name="url" value="${jdbc.url}" />

????????<property name="username" value="${jdbc.user}" />

????????<property name="password" value="${jdbc.password}" />

????</bean>

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????<!-- hibernate sessionFactory -->

????<bean id="sessionFactory"

????????class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">

????????<property name="dataSource" ref="dataSource" />

????????<property name="hibernateProperties">

????????????<props>

????????????????<prop key="hibernate.dialect">

????????????????????${hibernate.dialect}

????????????????</prop>

????????????????<prop key="hibernate.show_sql">true</prop>

????????????????<prop key="hibernate.query.substitutions">

????????????????????true 1, false 0, yes 'Y', no 'N'

????????????????</prop>

????????????????<prop key="hibernate.jdbc.fetch_size">50</prop>

????????????????<prop key="hibernate.jdbc.batch_size">25</prop>

????????????</props>

????????</property>

????????<property name="annotatedClasses">

????????????<list>

????????????????<value>cn.xiangyunsoft.busniess.model.Rose</value>

????????????????<value>cn.xiangyunsoft.busniess.model.User</value>

????????????????<value>cn.xiangyunsoft.busniess.model.Department</value>

????????????</list>

????????</property>

????</bean>

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????<!-- 配置事務管理 -->

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????<!-- 事務通知類 -->

????<bean id="profiler"

????????class="cn.xiangyunsoft.busniess.service.SimpleProfiler">

????????<!-- order 值可以決定通知的先后順序 ,與后面的order的值的大小，決定了是先通知再執行，還是先執行再通知-->

????????<property name="order" value="2" />

????</bean>

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????<bean id="transactionManager"

????????class="org.springframework.orm.hibernate3.HibernateTransactionManager">

????????<property name="sessionFactory" ref="sessionFactory" />

????</bean>

????<tx:advice id="txAdvice" transaction-manager="transactionManager">

????????<!-- the transactional semantics... -->

????????<tx:attributes>

????????????<!-- 以get 、 find 開頭的方法是只讀事務 -->

????????????<tx:method name="get*" read-only="true" />

????????????<tx:method name="find*" read-only="true" />

????????????<!-- 其他方法是默認 -->

????????????<tx:method name="*" />

????????</tx:attributes>

????</tx:advice>

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????<aop:config>

????????<!-- 此處的IService 是表示對所有實現IService接口的類管理事務 -->

????????<aop:pointcut id="serviceOperation"

????????????expression="execution(* cn.xiangyunsoft.busniess.service.IService.*(..))" />

????????<aop:advisor advice-ref="txAdvice"

????????????pointcut-ref="serviceOperation" order="1" />

????????<aop:aspect id="profilingAspect" ref="profiler">

????????????<!-- -->

????????????<aop:pointcut id="serviceMethodWithReturnValue"

????????????????expression="execution(!void cn.xiangyunsoft.busniess.service..*Service.*(..))" />

????????????<!-- 通知類型為after-throwing 表示發生異常時通知，還有其他選擇 -->

????????????<aop:after-throwing method="profile"

????????????????pointcut-ref="serviceMethodWithReturnValue" />

????????</aop:aspect>

????</aop:config>

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</beans>

Service 層的bean 在另一個beans.xml文件配置

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

????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-2.0.xsd">

????<bean id="userService"

????????class="cn.xiangyunsoft.busniess.service.UserServiceImpl">

????????<property name="userDao" ref="userDao"></property>

????</bean>

????<bean id="userDao"

????????class="cn.xiangyunsoft.busniess.dao.UserDao">

????????<property name="sessionFactory" ref="sessionFactory"></property>

????</bean>

</beans>

還有一個執行通知的類

public class SimpleProfiler implements Ordered {

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????private int order;

// allows us to control the ordering of advice

public int getOrder() {

return this.order;

}

public void setOrder(int order) {

this.order = order;

}

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// this method is the around advice

public Object profile(ProceedingJoinPoint call) throws Throwable {

????System.out.println("事務執行完成");

Object returnValue;

StopWatch clock = new StopWatch(getClass().getName());

try {

clock.start(call.toShortString());

returnValue = call.proceed();

} finally {

clock.stop();

System.out.println(clock.prettyPrint());

}

return returnValue;

}

}

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測試類：

public class BaseServiceTest extends AbstractTransactionalSpringContextTests {

????protected String[] getConfigLocations() {

????????return new String[] { "classpath:/applicationContext_Test.xml",

????????????????"beans.xml" };

????}

}

public class UserServiceTest extends BaseServiceTest {

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????private UserService userService;

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????public void setUserService(UserService userService) {

????????this.userService = userService;

????}

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????public UserService getUserService() {

????????return userService;

????}

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????@Test

????public void testLogin() {

????????User user = new User("adm");

????????user.setPassword("admin");

????????userService.login(user);

????}

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????@Test

????public void testSave() {

????????User user = new User("122");

????????user.setName("abc");

????????userService.save(user);

????}

}

這兩個測試方法一個成功，一個不成功就可以測試出通知發生在不同的時間了。

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一點感想：

就是在讀Spring手冊時不夠認真，這個事務配置了好幾天，都是不成功，在網上也沒有找到合適的解決方法，最后又仔細的讀了一次手冊，終于成功！教訓~！