Spring annotation风格的transaction

spring annotation风格的transactiuon声明的优点在于方便，简洁，而缺点就在于与代码耦合和无法引入spring2.x的aspectj的生命的pointcut；

 

我们首先来看一下实例：

 

applicationContext文件：

 

文件jdbc-applicationContext.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"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.0.xsd"><bean id="dataSource"class="org.springframework.jdbc.datasource.SingleConnectionDataSource"><property name="driverClassName"value="com.mysql.jdbc.Driver"></property><property name="url" value="jdbc:mysql://127.0.0.1:3306/test"></property><property name="username" value="root"></property><property name="password" value="coreymylife"></property></bean><bean id="jdbcTemplate"class="org.springframework.jdbc.core.JdbcTemplate" abstract="false"><property name="dataSource"><ref bean="dataSource" /></property></bean></beans>

 

 

文件tx.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.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd"><bean id="transactionManager"class="org.springframework.jdbc.datasource.DataSourceTransactionManager"><property name="dataSource"><ref bean="dataSource"></ref></property></bean><tx:annotation-driven /><bean id="bookDao" class="org.corey.spring.tx.BooksDao"><property name="jdbcTemplate"><ref bean="jdbcTemplate" /></property></bean></beans>

 

在上述文件中，我们省却了很多额外的典型的spring1.x的bean生命，简洁了很多；

 

数据库访问代码：

 

package org.corey.spring.tx;import java.util.Map;import org.springframework.jdbc.core.JdbcTemplate;import org.springframework.jdbc.core.support.JdbcDaoSupport;import org.springframework.transaction.annotation.Propagation;import org.springframework.transaction.annotation.Transactional;public class BooksDao extends JdbcDaoSupport {@Transactional(propagation = Propagation.REQUIRED, rollbackFor = CoreyException.class)public int addBookWithAuthors(Map bookInfo) {JdbcTemplate template = this.getJdbcTemplate();template.update("insert into books(BOOKID,NAME) values(?,?)",new Object[] { bookInfo.get("BOOKID"), bookInfo.get("NAME"), });addAuthorsIfNotExists(Integer.parseInt((String) bookInfo.get("AUTHORID")), (String) bookInfo.get("AUTHORNAME"));return 0;}public int deleteAuthorsBook(String authorCode) {// TODO Auto-generated method stubreturn 0;}private void addAuthorsIfNotExists(int id, String name) {JdbcTemplate template = this.getJdbcTemplate();template.update("insert into author(ID,NAME) values(?,?)",new Object[] { id, name });}}

 

在没有声明transaction的时候，在当author中主键重复，而book加入正常，当声明了tansaction，author主键重复的时候，book假如回滚；