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编程式事务，不建议使用因为在service会有大量的重复代码
xml配置
代码语言：javascript复制<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd">
<!-- 配置业务层-->
<bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">
<property name="accountDao" ref="accountDao"></property>
<property name="transactionTemplate" ref="transactionTemplate"></property>
</bean>
<!-- 配置账户的持久层-->
<bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置数据源-->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://localhost:3306/eesy"></property>
<property name="username" value="root"></property>
<property name="password" value="1234"></property>
</bean>
<!-- 配置事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!--配置事务模板对象 编程式事务 模板-->
<bean id="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager" ref="transactionManager"></property>
</bean>
</beans>service层代码
代码语言：javascript复制/**
* 账户的业务层实现类
*
* 事务控制应该都是在业务层
*/
public class AccountServiceImpl implements IAccountService{
private IAccountDao accountDao;
private TransactionTemplate transactionTemplate;
public void setTransactionTemplate(TransactionTemplate transactionTemplate) {
this.transactionTemplate = transactionTemplate;
}
public void setAccountDao(IAccountDao accountDao) {
this.accountDao = accountDao;
}
@Override
public Account findAccountById(Integer accountId) {
return transactionTemplate.execute(new TransactionCallback<Account>() {
@Override
public Account doInTransaction(TransactionStatus status) {
return accountDao.findAccountById(accountId);
}
});
}
@Override
public void transfer(String sourceName, String targetName, Float money) {
transactionTemplate.execute(new TransactionCallback<Object>() {
@Override
public Object doInTransaction(TransactionStatus status) {
System.out.println("transfer....");
//2.1根据名称查询转出账户
Account source = accountDao.findAccountByName(sourceName);
//2.2根据名称查询转入账户
Account target = accountDao.findAccountByName(targetName);
//2.3转出账户减钱
source.setMoney(source.getMoney()-money);
//2.4转入账户加钱
target.setMoney(target.getMoney() money);
//2.5更新转出账户
accountDao.updateAccount(source);
// int i=1/0;
//2.6更新转入账户
accountDao.updateAccount(target);
return null;
}
});
}
}
