① 引入tx命名空间
<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.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
② 配置事务增强
<bean id="accountService" class="com.lenyoo.service.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDao"/>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
bean>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*"/>
tx:attributes>
tx:advice>
③ 配置事务 AOP 织入
<aop:config>
<aop:pointcut id="txPointcut" expression="execution(* com.lenyoo.service.impl.*.*(..))"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="txPointcut"/>
aop:config>
④ 测试事务控制转账业务代码
@Override
public void transfer(String outMan, String inMan, double money) {
accountDao.out(outMan,money);
int i = 1/0;
accountDao.in(inMan,money);
}
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="transfer" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
<tx:method name="save" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false"/>
<tx:method name="findAll" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/>
<tx:method name="update*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true"/>
<tx:method name="*"/>
tx:attributes>
tx:advice>
其中,
① 编写 AccoutDao
@Repository("accountDao")
public class AccountDaoImpl implements AccountDao {
@Autowired
private JdbcTemplate jdbcTemplate;
public void out(String outMan, double money) {
jdbcTemplate.update("update account set money=money-? where name=?",money,outMan);
}
public void in(String inMan, double money) {
jdbcTemplate.update("update account set money=money+? where name=?",money,inMan);
}
}
② 编写 AccoutService
@Service("accountService")
@Transactional(isolation = Isolation.REPEATABLE_READ)
public class AccountServiceImpl implements AccountService {
@Autowired
private AccountDao accountDao;
@Transactional(isolation = Isolation.READ_COMMITTED,propagation = Propagation.REQUIRED)
public void transfer(String outMan, String inMan, double money) {
accountDao.out(outMan,money);
//int i = 1/0;
accountDao.in(inMan,money);
}
}
③ 编写 applicationContext.xml 配置文件
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test"/>
<property name="user" value="root"/>
<property name="password" value="WLY755414220"/>
bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="dataSource"/>
bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
bean>
<context:component-scan base-package="com.lenyoo"/>
<tx:annotation-driven transaction-manager="transactionManager"/>
① 使用 @Transactional 在需要进行事务控制的类或是方法上修饰,注解可用的属性同 xml 配置方式,例如隔离
级别、传播行为等。
② 注解使用在类上,那么该类下的所有方法都使用同一套注解参数配置。
③ 使用在方法上,不同的方法可以采用不同的事务参数配置。
④ Xml配置文件中要开启事务的注解驱动