Java Framework Spring Learning Note (20): Transaction management (Annotation management)

Annotation management is much simpler than the way XML is configured

Simply add the transaction annotations in the configuration file

1 <?XML version= "1.0" encoding= "UTF-8"?>2 <Beansxmlns= "Http://www.springframework.org/schema/beans"3 Xmlns:tx= "Http://www.springframework.org/schema/tx"4 XMLNS:AOP= "HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP"5 Xmlns:context= "Http://www.springframework.org/schema/context"6 Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance"7 xsi:schemalocation="8 Http://www.springframework.org/schema/beans9 http://www.springframework.org/schema/beans/spring-beans.xsdTen Http://www.springframework.org/schema/context One http://www.springframework.org/schema/context/spring-context.xsd A Http://www.springframework.org/schema/tx - http://www.springframework.org/schema/tx/spring-tx.xsd - HTTP://WWW.SPRINGFRAMEWORK.ORG/SCHEMA/AOP the http://www.springframework.org/schema/aop/spring-aop.xsd "> -  -     <!--Configuring the C3P0 connection pool - -     <BeanID= "DataSource"class= "Com.mchange.v2.c3p0.ComboPooledDataSource"> +         <!--Inject DAO object - -         < Propertyname= "Driverclass"value= "Com.mysql.jdbc.Driver"></ Property> +         < Propertyname= "Jdbcurl"value= "Jdbc:mysql:///test"></ Property> A         < Propertyname= "User"value= "root"></ Property> at         < Propertyname= "Password"value= "jqbjqbjqb123"></ Property> -     </Bean> -  -     <BeanID= "OrderService"class= "Cn.service.OrderService"> -         < Propertyname= "Orderdao"ref= "Orderdao"></ Property> -     </Bean> in     <BeanID= "Orderdao"class= "Cn.dao.OrderDao"> -         <!--inject JdbcTemplate Object - to         < Propertyname= "JdbcTemplate"ref= "JdbcTemplate"></ Property> +     </Bean> -  the     <!--Create a JdbcTemplate object - *     <BeanID= "JdbcTemplate"class= "Org.springframework.jdbc.core.JdbcTemplate"> $         <!--Pass the DataSource to the template object -Panax Notoginseng         < Propertyname= "DataSource"ref= "DataSource"></ Property> -     </Bean> the  +     <!--First Step: Configure the transaction manager - A     <BeanID= "TransactionManager"class= "Org.springframework.jdbc.datasource.DataSourceTransactionManager"> the         <!--inject DataSource - +         < Propertyname= "DataSource"ref= "DataSource"></ Property> -     </Bean> $  $     <!--Step Two: Turn on transaction annotations - -     <Tx:annotation-drivenTransaction-manager= "TransactionManager"></Tx:annotation-driven> -  the </Beans>

Then add the annotation @Transactional on the logical business class to

1  PackageCn.service;2 3 ImportCn.dao.OrderDao;4 Importorg.springframework.transaction.annotation.Transactional;5  6 @Transactional 7  Public classOrderService {8     PrivateOrderdao Orderdao;9 Ten      Public voidSetorderdao (Orderdao Orderdao) { One          This. Orderdao =Orderdao; A     } -  -     //methods to invoke DAO the     //business logic layer, write transfer business -      Public voidAccountmoney () { -         //Dog Egg Transfer to the founding, on the book is the dog eggs to reduce money, the founding of more money -         //The dog and the egg cut the money + Orderdao.lessmoney (); -         inti = 10/0; +         //Founding more money A Orderdao.moremoney (); at     } -}

Prevents the data from being inconsistent due to unknown errors.

Java Framework Spring Learning Note (20): Transaction management (Annotation management)