编程式事务管理
通过使用将Spring框架提供的TransactionTemplate模板注入到业务层来进行事务管理，这样对业务层原来的代码修改过多。不利于项目的后期维护。
以下是声明式事务管理的具体代码实现：
环境搭建：http://www.cnblogs.com/kuoAT/p/7803193.html
Dao层
package com.sdf.spring; /**
* @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
package com.sdf.spring; import org.springframework.jdbc.core.support.JdbcDaoSupport; /**
* 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
package com.sdf.spring; /**
* @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;
//在业务类中注入事务模板
@Resource(name="transactionTemplate")
private TransactionTemplate transactionTemplate;
@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);
transactionTemplate.execute(new TransactionCallbackWithoutResult() {
@Override
protected void doInTransactionWithoutResult(TransactionStatus status) {
accountDao.add(input, money);
int a = 1/0;//模拟转账过程中发生故障
accountDao.remove(out, money);
}
});
} public void setAccountDao(AccountDao accountDao) {
this.accountDao = accountDao;
}
public void setTransactionTemplate(TransactionTemplate transactionTemplate) {
this.transactionTemplate = transactionTemplate;
} }
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.spring.dao.impl.AccountDaoimpl">
<property name="dataSource" ref="datasource"></property>
</bean>
<bean id="accountService" class="com.sdf.spring.service.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDao"/>
<property name="transactionTemplate" ref="transactionTemplate"/>
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="datasource"/>
</bean> <!-- 定义事务管理模板：Spring为了简化事务管理的代码提供的类 -->
<bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager" ref="transactionManager"/>
</bean>
</beans>
测试类
/**
* @author AT
* 测试转账信息 编程式事务管理
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext.xml")
public class AccountTest {
@Resource(name="accountService")
private AccountSevice accountService;
@Test
public void test01(){
accountService.transfer("A", "B", 100d);
}
public void setAccountService(AccountSevice accountService) {
this.accountService = accountService;
}
}