声明式事务管理 基于AspectJ的 XML 方式配置
通过对事务管理器TransactionManager配置通知(增强),然后再配置切点和切面,详细见applicationContext.xml配置文件
这种事务管理对业务层没有代码修改,在xml配置文件中也简化了设置,在真正开发中经常使用。
dao层
/** * @author AT * 转账dao层 */ public interface AccountDao { /** * 转出钱 * @param outer * @param money */ public void remove(String outer,Double money); /** * 转入钱 * @param input * @param money */ public void add(String input,Double money); }
dao层实现类
/** * 转账dao层实现 */ public class AccountDaoimpl extends JdbcDaoSupport implements AccountDao{ /** * 转出钱 * @param outer * @param money */ @Override public void remove(String outer, Double money) { String sql = "update account set money = money - ? where name = ?"; this.getJdbcTemplate().update(sql, money,outer); } /** * 转入钱 * @param input * @param money */ @Override public void add(String input, Double money) { String sql = "update account set money = money + ? where name = ?"; this.getJdbcTemplate().update(sql, money,input); } }
service业务层
/** * @author AT * 转账业务接口 */ public interface AccountSevice { public void transfer(String input,String out,Double money);//消费 }
service业务层实现类
/** * @author AT * 编程式事务管理 */ public class AccountServiceImpl implements AccountSevice { @Resource(name="accountDao") private AccountDao accountDao; @Override public void transfer(final String input, final String out,final Double money) { accountDao.remove(out, money); // int a = 1/0; accountDao.add(input, money); } public void setAccountDao(AccountDao accountDao) { this.accountDao = accountDao; } }
applicationContext.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:context="http://www.springframework.org/schema/context" 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/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <!-- 引入外部属性文件 --> <context:property-placeholder location="classpath:jdbc.properties"/> <!-- 配置C3P0连接池 --> <bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="${jdbc.driverClass}"/> <property name="jdbcUrl" value="${jdbc.url}"/> <property name="user" value="${jdbc.username}"/> <property name="password" value="${jdbc.password}"/> </bean> <!-- dao层和业务的类 --> <bean id="accountDao" class="com.sdf.spring02.AccountDaoimpl"> <property name="dataSource" ref="datasource"></property> </bean> <bean id="accountService" class="com.sdf.spring02.AccountServiceImpl"> <property name="accountDao" ref="accountDao"/> </bean> <!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="datasource"/> </bean> <!-- 配置事务的通知:(事务的增强) --> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <!-- * propagation 事务传播行为 * isolation 事务隔离级别 * read-only 只读 * rollback-for 发生异常回滚 * no-rollback-for 发生异常不回滚 * timeout 超时信息 --> <tx:method name="transfer" propagation="REQUIRED"/> </tx:attributes> </tx:advice> <!-- 配置切面 --> <aop:config> <!-- 配置切入点 --> <aop:pointcut expression="execution(* com.sdf.spring02.*.*(..))" id="pointcut1"/> <!-- 配置切面 --> <aop:advisor advice-ref="txAdvice" pointcut-ref="pointcut1"/> </aop:config> </beans>
测试
/** * @author AT * 测试转账信息 声明式事务管理 基于AspectJ的 XML 方式配置 */ @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("classpath:applicationContext02.xml") public class AccountTest { @Resource(name="accountService") private AccountSevice accountService; @Test public void test01(){ accountService.transfer("A", "B", 300d); } public void setAccountService(AccountSevice accountService) { this.accountService = accountService; } }