Spring 在xml配置里配置事务
事先准备：
配置数据源对象
用<bean>实例化各个业务对象。
1.配置事务管理器。
<bean id="transactionManager" class="org.springframework.jdbc.datasourceManager"> <property name="datasource" ref="datasource"></property> </bean>
2.配置事务属性
<tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="方法名" propagation="REQUIRES_NEW"/> <!--新开事务--> <tx:method name="*"/> <!--使用原有事务--> </tx:attributes> </tx:advice>
3.配置事务切入点，注入事务属性
<aop:config> <aop:pointcut expression="execution(.......)" id="txPointCut"/> <aop:advisor advice-ref="txtAdvice" pointcut-ref="txtPointCut"/> </aop:config>
实例：
准备工作：导入c3p0、Spring框架、Mysql、AOP的jar包，并配置好。
db.properties
driverClass=com.mysql.jdbc.Driver jdbcUrl=jdbc:mysql://localhost:3306/mydb user=root password= minPoolSize=5 maxPoolSize=20 initialPoolSize=5
三个接口
package com.itnba.maya.dao; public interface IInfoDao { public void delete(String code); }
package com.itnba.maya.dao; public interface IWorkDao { public void deleteInfocode(String code); }
package com.itnba.maya.dao; public interface IInfoService { public void delete(String code); }
接口的实现类
package com.itnba.maya.daoimp; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Repository; import com.itnba.maya.dao.IInfoDao; public class InfoDao implements IInfoDao { private JdbcTemplate j; public JdbcTemplate getJ() { return j; } public void setJ(JdbcTemplate j) { this.j = j; } @Override public void delete(String code) { // 故意设置一个错误 if(code.equals("p008")){ int n=1/0; } String sql="delete from info where code=?"; j.update(sql,code); } }
package com.itnba.maya.daoimp; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.jdbc.core.JdbcTemplate; import org.springframework.stereotype.Repository; import com.itnba.maya.dao.IWorkDao; public class WorkDao implements IWorkDao { private JdbcTemplate j; public JdbcTemplate getJ() { return j; } public void setJ(JdbcTemplate j) { this.j = j; } public void deleteInfocode(String code) { String sql="delete from work where infocode=?"; j.update(sql,code); } }
package com.itnba.maya.daoimp; import com.itnba.maya.dao.IInfoDao; import com.itnba.maya.dao.IInfoService; import com.itnba.maya.dao.IWorkDao; public class InfoService implements IInfoService { private IInfoDao infoDao; public IInfoDao getInfoDao() { return infoDao; } public void setInfoDao(IInfoDao infoDao) { this.infoDao = infoDao; } public IWorkDao getWorkdao() { return workdao; } public void setWorkdao(IWorkDao workdao) { this.workdao = workdao; } private IWorkDao workdao; public void delete(String code) { infoDao.delete(code); workdao.deleteInfocode(code); } }
XML配置文件
<?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" default-autowire="byName" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> <!-- 引入db.properties文件 --> <context:property-placeholder location="classpath:db.properties"/> <!-- 生成连接池 --> <bean class="com.mchange.v2.c3p0.ComboPooledDataSource" id="dataSource"> <property name="driverClass" value="${driverClass}"></property> <property name="jdbcUrl" value="${jdbcUrl}"></property> <property name="user" value="${user}"></property> <property name="password" value="${password}"></property> <property name="minPoolSize" value="${minPoolSize}"></property> <property name="maxPoolSize" value="${maxPoolSize}"></property> <property name="initialPoolSize" value="${initialPoolSize}"></property> </bean> <!-- 生成JdbcTemplate --> <bean class="org.springframework.jdbc.core.JdbcTemplate" id="j"> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 配置实体类 --> <bean class="com.itnba.maya.daoimp.InfoDao" id="infoDao"> <property name="j" ref="j"></property> </bean> <bean class="com.itnba.maya.daoimp.WorkDao" id="workDao"> <property name="j" ref="j"></property> </bean> <bean class="com.itnba.maya.daoimp.InfoService" id="service"> <property name="infoDao" ref="infoDao"></property> <property name="workdao" ref="workDao"></property> </bean> <!-- 配置事务管理器 --> <bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager" id="transactionManager"> <property name="dataSource" ref="dataSource"></property> </bean> <tx:advice id="advice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="*" propagation="REQUIRED"/><!-- *是对所有方法都加 --> </tx:attributes> </tx:advice> <!-- 用切点把事务切进去 --> <aop:config> <aop:pointcut expression="execution(* com.itnba.maya.daoimp..*.*(..))" id="pointcut"/> <aop:advisor advice-ref="advice" pointcut-ref="pointcut"/> </aop:config> </beans>
mian函数测试事务有没有生效：
package com.itnba.maya.daoimp; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.itnba.maya.dao.IInfoService; public class Test { private static ApplicationContext context=null; private static IInfoService infoservice=null; static{ context=new ClassPathXmlApplicationContext("beans.xml"); infoservice=(IInfoService) context.getBean("service"); } public static void main(String[] args) { infoservice.delete("p008"); } }
结果除0错误，数据回滚，数据库并没有删除。说明配置的事务生效了。
