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。
