28spring_ Transaction Management-bank transfer business plus transaction control-declarative transaction management based on annotations

Give Applicationcontext.xml and Accountserviceimpl back a backup named Applicationcontext2.xml and Accountserviceimpl2.java

First step: Configure the transaction manager

Step Two: Configure note drivers

The above two steps are done in Applicationcontext2.xml.

The contents are as follows:

<?XML version= "1.0" encoding= "UTF-8"?><Beansxmlns= "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"Xmlns:context= "Http://www.springframework.org/schema/context"xsi:schemalocation= "Http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/sp Ring-beans-2.5.xsd HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP http://w Ww.springframework.org/schema/aop/spring-aop-2.5.xsd Http://www.springframework.org/schema/conte                           XT Http://www.springframework.org/schema/context/spring-context-2.5.xsd Http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx- 2.5.xsd "> <!--<bean class= "Org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>  -<!--Introducing peoperties Files -<!--<context:property-placeholder location= "classpath:db.properties"/> -<Beanclass= "Org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">< Propertyname= "Locations"value= "Classpath:db.properties"/></Bean> <BeanID= "DataSource"class= "Com.mchange.v2.c3p0.ComboPooledDataSource">  < Propertyname= "Driverclass"value= "${driver}"/>  < Propertyname= "Jdbcurl"value= "${url}"></ Property> < Propertyname= "User"value= "${username}"></ Property>< Propertyname= "Password"value= "${password}"></ Property></Bean>     <BeanID= "JdbcTemplate"class= "Org.springframework.jdbc.core.JdbcTemplate">< Propertyname= "DataSource"ref= "DataSource"/></Bean><BeanID= "Accountdao"class= "Cn.itcast.dao.AccountDaoimpl">< Propertyname= "JdbcTemplate"ref= "JdbcTemplate"/></Bean><BeanID= "Accountservice"class= "CN.ITCAST.SERVICE.ACCOUNTSERVICEIMPL2"></Bean>


<!--Two configurations with annotations--    <!--The first step is to configure the transaction manager -<BeanID= "TransactionManager"class= "Org.springframework.jdbc.datasource.DataSourceTransactionManager">< Propertyname= "DataSource"ref= "DataSource"></ Property></Bean><!--Step Two: Configure annotation drivers, annotations for transaction management -<Tx:annotation-drivenTransaction-manager= "TransactionManager"/></Beans>

Step three: Complete in Accountserviceimpl2.java, add @transactional annotations on the Business Class (business method) that needs to manage transactions

Importorg.springframework.beans.factory.annotation.Autowired;Importorg.springframework.transaction.annotation.Transactional;ImportCn.itcast.dao.AccountDao;/** Implementation Class of Transfer interface*/ Public classAccountServiceimpl2ImplementsAccountservice {/*** This class is the implementation class for the transfer interface.   The question we have to consider is how to inject the DAO into it.   * Here @Autowired in annotated way. * Once in this way, before that Set/get way in Applicationcontext.xml * <bean id= "Accountservice" class= " Cn.itcast.service.AccountServiceimpl "> <!--<property name=" Accountdao "ref=" Accountdao "/>---&   Lt;/bean> inside the property name= "Accountdao" ref= "Accountdao"/> must be removed. *    *    */@AutowiredPrivateAccountdao Accountdao; @Transactional Public voidTransfer (String outaccount, String Inaccount,DoubleMoney) {Accountdao.addmoney (Inaccount, money);
After adding an exception here, it does not go down here, it will cause said Accountdao.addmoney (Inaccount, money) executed; Accountdao.reducemoney ( Outaccount, Money) did not execute.     inta=1/0;        Accountdao.reducemoney (Outaccount, money); }}

The configuration of the annotations is completed in three steps above.

Take a look at the result: Yes.

Actual work: In fact, the XML configuration method of the previous paper is more than the annotation configuration described in this article.

Description: There are three main frameworks for the integration of this series, which is not seen for the time being.

28spring_ Transaction Management-bank transfer business plus transaction control-declarative transaction management based on annotations