如果TransactionProxyFactoryBean用于服务层bean，那么是否有必要在dao中驱动事务注释？

如何解决如果TransactionProxyFactoryBean用于服务层bean，那么是否有必要在dao中驱动事务注释？

| 服务层的接口是：

EMS.java:

public interface EMS extends UserDetailsService {

    public void saveUser(User user);
}

及其实现：

EMSImpl.java:

@Service(\"emsImpl\")
@Transactional(readOnly=true)
public class EMSImpl implements EMS {

    private final Logger logger = LoggerFactory.getLogger(getClass());

    @Autowired
    @Qualifier(\"dao\")
    private EMSDao dao;


    @Transactional(readOnly=false)
    public void saveUser(User user) {
        dao.saveUser();
    }
}

dao的接口：

EMSDao.java:

public interface EMSDao {

    public void saveUser(User user);
}

及其实现：

HibernateEMSDao.java

@Repository(\"EMSDao\")
public class HibernateEMSDao extends HibernateDaoSupport implements EMSDao {

    private final Logger logger = LoggerFactory.getLogger(getClass());  

    private SchemaHelper schemaHelper;

    public void setSchemaHelper(SchemaHelper schemaHelper) {
        this.schemaHelper = schemaHelper;
    }

    @Transactional(readOnly=false)
    public synchronized void saveUser(final User user) {        
        Session session = getSessionFactory().getCurrentSession();
        session.merge(user);
        }       

    private void storeUser(User user) {
        getHibernateTemplate().save(user);
    }

    public void createSchema() {        
        try {
            getHibernateTemplate().find(\"from User user where user.id = 1\");
        } catch (Exception e) {
            logger.warn(\"expected database schema does not exist,will create. Error is: \" + e.getMessage());
            schemaHelper.createSchema();
            User admin = new User();
            admin.setUsername(\"admin\");
            admin.setName(\"Admin\");
            admin.setEmail(\"admin\");
            admin.setPassword(\"21232f297a57a5a743894a0e4a801fc3\");
            admin.setRoles(new HashSet<Role>(Arrays.asList(new Role(\"admin\",\"ADMINISTRATOR\"))));
            logger.info(\"inserting default admin user into database\");
            storeUser(admin);           
            logger.info(\"schema creation complete\");                        
            return;
        }
        logger.info(\"database schema exists,normal startup\");      
    }
}

appliactionContext.xml中的4ѭ由TransactionProxyfactorybean创建。我也在用<tx:annotation-driven /> 完整的applicationContext.xml是：

<?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: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\">

    <bean class=\"info.ems.config.EMSConfigurer\"/>

    <bean id=\"passwordEncoder\" class=\"org.acegisecurity.providers.encoding.Md5PasswordEncoder\"/>

    <bean id=\"ems\" class=\"org.springframework.transaction.interceptor.TransactionProxyfactorybean\">
    <property name=\"transactionManager\" ref=\"transactionManager\"/>        
    <property name=\"target\">            
        <bean class=\"info.ems.EMSImpl\" init-method=\"init\">
            <property name=\"dao\" ref=\"dao\"/>
            <property name=\"passwordEncoder\" ref=\"passwordEncoder\"/>
            <property name=\"localeList\" value=\"${ems.locales}\"/>
            <property name=\"releaseVersion\" value=\"${ems.version}\"/>
            <property name=\"releaseTimestamp\" value=\"${ems.timestamp}\"/>
            <property name=\"emsHome\" value=\"${ems.home}\"/>
        </bean>
    </property>        
    <property name=\"transactionAttributes\">
        <props>                
            <prop key=\"store*\">PROPAGATION_required</prop>
            <prop key=\"update*\">PROPAGATION_required</prop>
            <prop key=\"remove*\">PROPAGATION_required</prop>                
            <prop key=\"bulkupdate*\">PROPAGATION_required</prop>
            <prop key=\"*\">PROPAGATION_SUPPORTS,readOnly</prop>
        </props>
    </property>        
    </bean>   

    <tx:annotation-driven transaction-manager=\"transactionManager\" />

    <bean id=\"transactionManager\" class=\"org.springframework.orm.hibernate3.HibernateTransactionManager\">
    <property name=\"sessionFactory\" ref=\"sessionFactory\"/>
    </bean>

    <bean id=\"dataSource\" class=\"info.ems.datasource.DataSourceFactory\">
    <property name=\"driverClassName\" value=\"${database.driver}\"/>
    <property name=\"url\" value=\"${database.url}\"/>
    <property name=\"username\" value=\"${database.username}\"/>
    <property name=\"password\" value=\"${database.password}\"/>
    <property name=\"validationQuery\" value=\"${database.validationQuery}\"/>
    <property name=\"dataSourceJndiName\" value=\"${database.datasource.jndiname}\"/>
    </bean>     

    <bean id=\"sessionFactory\" class=\"org.springframework.orm.hibernate3.LocalSessionfactorybean\">
    <property name=\"dataSource\" ref=\"dataSource\"/>
    <property name=\"configLocation\">
            <value>/WEB-INF/hibernate.cfg.xml</value>
        </property>
    <property name=\"configurationClass\">
        <value>org.hibernate.cfg.AnnotationConfiguration</value>
        </property>        
    <property name=\"hibernateProperties\">
        <props>
            <prop key=\"hibernate.dialect\">${hibernate.dialect}</prop>        
            <prop key=\"hibernate.show_sql\">${hibernate.show_sql}</prop> 
            <prop key=\"hibernate.current_session_context_class\">org.hibernate.context.ThreadLocalSessionContext</prop>    
        </props>
    </property>        
    </bean>

    <bean id=\"dao\" class=\"info.ems.hibernate.HibernateEMSDao\" init-method=\"createSchema\">
    <property name=\"hibernateTemplate\">
        <bean class=\"org.springframework.orm.hibernate3.HibernateTemplate\">
            <property name=\"sessionFactory\" ref=\"sessionFactory\"/>
        </bean>
    </property>        
    <property name=\"schemaHelper\">
        <bean class=\"info.ems.hibernate.SchemaHelper\">                                
            <property name=\"driverClassName\" value=\"${database.driver}\"/>
            <property name=\"url\" value=\"${database.url}\"/>
            <property name=\"username\" value=\"${database.username}\"/>
            <property name=\"password\" value=\"${database.password}\"/>
            <property name=\"hibernateDialect\" value=\"${hibernate.dialect}\"/>   
            <property name=\"dataSourceJndiName\" value=\"${database.datasource.jndiname}\"/>
        </bean>                
    </property>
    </bean>       
</beans>

我想知道：在Spring之前处理数据库事务是否正确的配置？是否需要同时使用ѭ6和ѭ7？我可以获取示例的任何信息或Web链接都将非常有帮助。谢谢并恭祝安康。编辑：从skaffman得到建议后，修改后的appliactionContext.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: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\">

    <bean class=\"info.ems.config.EMSConfigurer\"/>

    <bean id=\"passwordEncoder\" class=\"org.acegisecurity.providers.encoding.Md5PasswordEncoder\"/>

    <bean id=\"ems\" class=\"info.ems.EMSImpl\" init-method=\"init\">
            <property name=\"dao\" ref=\"dao\"/>
            <property name=\"passwordEncoder\" ref=\"passwordEncoder\"/>
            <property name=\"localeList\" value=\"${ems.locales}\"/>
            <property name=\"releaseVersion\" value=\"${ems.version}\"/>
            <property name=\"releaseTimestamp\" value=\"${ems.timestamp}\"/>
            <property name=\"emsHome\" value=\"${ems.home}\"/>
    </bean>

    <tx:annotation-driven transaction-manager=\"transactionManager\" />

    <bean id=\"transactionManager\" class=\"org.springframework.orm.hibernate3.HibernateTransactionManager\">
    <property name=\"sessionFactory\" ref=\"sessionFactory\"/>
    </bean>

    <bean id=\"dataSource\" class=\"info.ems.datasource.DataSourceFactory\">
    <property name=\"driverClassName\" value=\"${database.driver}\"/>
    <property name=\"url\" value=\"${database.url}\"/>
    <property name=\"username\" value=\"${database.username}\"/>
    <property name=\"password\" value=\"${database.password}\"/>
    <property name=\"validationQuery\" value=\"${database.validationQuery}\"/>
    <property name=\"dataSourceJndiName\" value=\"${database.datasource.jndiname}\"/>
    </bean>     

    <bean id=\"sessionFactory\" class=\"org.springframework.orm.hibernate3.LocalSessionfactorybean\">
    <property name=\"dataSource\" ref=\"dataSource\"/>
    <property name=\"configLocation\">
            <value>/WEB-INF/hibernate.cfg.xml</value>
        </property>
    <property name=\"configurationClass\">
        <value>org.hibernate.cfg.AnnotationConfiguration</value>
        </property>        
    <property name=\"hibernateProperties\">
        <props>
            <prop key=\"hibernate.dialect\">${hibernate.dialect}</prop>        
            <prop key=\"hibernate.show_sql\">${hibernate.show_sql}</prop> 
            <prop key=\"hibernate.current_session_context_class\">org.hibernate.context.ThreadLocalSessionContext</prop>    
        </props>
    </property>        
    </bean>

    <bean id=\"dao\" class=\"info.ems.hibernate.HibernateEMSDao\" init-method=\"createSchema\">
    <property name=\"hibernateTemplate\">
        <bean class=\"org.springframework.orm.hibernate3.HibernateTemplate\">
            <property name=\"sessionFactory\" ref=\"sessionFactory\"/>
        </bean>
    </property>        
    <property name=\"schemaHelper\">
        <bean class=\"info.ems.hibernate.SchemaHelper\">                                
            <property name=\"driverClassName\" value=\"${database.driver}\"/>
            <property name=\"url\" value=\"${database.url}\"/>
            <property name=\"username\" value=\"${database.username}\"/>
            <property name=\"password\" value=\"${database.password}\"/>
            <property name=\"hibernateDialect\" value=\"${hibernate.dialect}\"/>   
            <property name=\"dataSourceJndiName\" value=\"${database.datasource.jndiname}\"/>
        </bean>                
    </property>
    </bean>       
</beans>

解决方法

在Spring之前处理数据库事务是否正确的配置？它是完全有效的，但是令人困惑并且重复工作。这可能会产生两层事务代理，尽管我怀疑这样做的行为会有所不同。如您所说，您可能不想同时使用TransactionProxyFactoryBean和<tx:annotation-driven />。您的“ 6”配置使用外部化的方法名称模式来确定哪些方法获得哪种事务语义。很好，尽管使用Spring的当前版本通常更容易使用注释，而不是TransactionProxyFactoryBean上的transactionAttributes属性。给定您的配置，我建议您摆脱显式的TransactionProxyFactoryBeanbean定义（<tx:annotation-driven />将在幕后根据需要创建自己的一个）。用未修饰的“ 19”替换，“ 7”将自动生成事务代理。

如果TransactionProxyFactoryBean用于服务层bean，那么是否有必要在dao中驱动事务注释？

如何解决如果TransactionProxyFactoryBean用于服务层bean，那么是否有必要在dao中驱动事务注释？

解决方法

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