spring中基于AOP的事务控制（实例）
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bean.xml
<?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: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/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 配置Service -->
<bean id="accountService" class="com.itheima.service.impl.AccountServiceImpl">
<!-- 注入dao -->
<property name="accountDao" ref="accountDao"></property>
</bean>
<!--配置Dao对象-->
<bean id="accountDao" class="com.itheima.dao.impl.AccountDaoImpl">
<!-- 注入QueryRunner -->
<property name="runner" ref="runner"></property>
<!-- 注入ConnectionUtils -->
<property name="connectionUtils" ref="connectionUtils"></property>
</bean>
<!--配置QueryRunner-->
<bean id="runner" class="org.apache.commons.dbutils.QueryRunner" scope="prototype"></bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!--连接数据库的必备信息-->
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/eesy"></property>
<property name="user" value="root"></property>
<property name="password" value="1234"></property>
</bean>
<!-- 配置Connection的工具类 ConnectionUtils -->
<bean id="connectionUtils" class="com.itheima.utils.ConnectionUtils">
<!-- 注入数据源-->
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置事务管理器-->
<bean id="txManager" class="com.itheima.utils.TransactionManager">
<!-- 注入ConnectionUtils -->
<property name="connectionUtils" ref="connectionUtils"></property>
</bean>
<!--配置aop-->
<aop:config>
<!--配置通用切入点表达式-->
<aop:pointcut id="pt1" expression="execution(* com.itheima.service.impl.*.*(..))"></aop:pointcut>
<aop:aspect id="txAdvice" ref="txManager">
<!--配置前置通知：开启事务-->
<aop:before method="beginTransaction" pointcut-ref="pt1"></aop:before>
<!--配置后置通知：提交事务-->
<aop:after-returning method="commit" pointcut-ref="pt1"></aop:after-returning>
<!--配置异常通知：回滚事务-->
<aop:after-throwing method="rollback" pointcut-ref="pt1"></aop:after-throwing>
<!--配置最终通知：释放连接-->
<aop:after method="release" pointcut-ref="pt1"></aop:after>
</aop:aspect>
</aop:config>
</beans>untils.ConnectionUtils
import javax.sql.DataSource;
import java.sql.Connection;
/**
* 连接的工具类，它用于从数据源中获取一个连接，并且实现和线程的绑定
*/
public class ConnectionUtils
private ThreadLocal<Connection> tl = new ThreadLocal<Connection>();
private DataSource dataSource;
public void setDataSource(DataSource dataSource)
this.dataSource = dataSource;
/**
* 获取当前线程上的连接
* @return
*/
public Connection getThreadConnection()
try
//1.先从ThreadLocal上获取
Connection conn = tl.get();
//2.判断当前线程上是否有连接
if (conn == null)
//3.从数据源中获取一个连接，并且存入ThreadLocal中
conn = dataSource.getConnection();
tl.set(conn);
//4.返回当前线程上的连接
return conn;
catch (Exception e)
throw new RuntimeException(e);
/**
* 把连接和线程解绑
*/
public void removeConnection()
tl.remove();
untils.TransactionManager
/**
* 和事务管理相关的工具类，它包含了，开启事务，提交事务，回滚事务和释放连接
*/
public class TransactionManager
private ConnectionUtils connectionUtils;
public void setConnectionUtils(ConnectionUtils connectionUtils)
this.connectionUtils = connectionUtils;
/**
* 开启事务
*/
public void beginTransaction()
try
connectionUtils.getThreadConnection().setAutoCommit(false);
catch (Exception e)
e.printStackTrace();
/**
* 提交事务
*/
public void commit()
try
connectionUtils.getThreadConnection().commit();
catch (Exception e)
e.printStackTrace();
/**
* 回滚事务
*/
public void rollback()
try
connectionUtils.getThreadConnection().rollback();
catch (Exception e)
e.printStackTrace();
/**
* 释放连接
*/
public void release()
try
connectionUtils.getThreadConnection().close();//还回连接池中
connectionUtils.removeConnection();
catch (Exception e)
e.printStackTrace();
IAccountService
/**
* 账户的业务层接口
*/
public interface IAccountService
/**
* 查询所有
* @return
*/
List<Account> findAllAccount();
/**
* 查询一个
* @return
*/
Account findAccountById(Integer accountId);
/**
* 保存
* @param account
*/
void saveAccount(Account account);
/**
* 更新
* @param account
*/
void updateAccount(Account account);
/**
* 删除
* @param acccountId
*/
void deleteAccount(Integer acccountId);
/**
* 转账
* @param sourceName 转出账户名称
* @param targetName 转入账户名称
* @param money 转账金额
*/
void transfer(String sourceName,String targetName,Float money);
//void test();//它只是连接点，但不是切入点，因为没有被增强
AccountServiceImpl
/**
* 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;
public void setAccountDao(IAccountDao accountDao)
this.accountDao = accountDao;
@Override
public List<Account> findAllAccount()
return accountDao.findAllAccount();
@Override
public Account findAccountById(Integer accountId)
return accountDao.findAccountById(accountId);
@Override
public void saveAccount(Account account)
accountDao.saveAccount(account);
@Override
public void updateAccount(Account account)
accountDao.updateAccount(account);
@Override
public void deleteAccount(Integer acccountId)
accountDao.deleteAccount(acccountId);
@Override
public void transfer(String sourceName, String targetName, Float money)
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);
Account
import java.io.Serializable;
/**
* 账户的实体类
*/
public class Account implements Serializable
private Integer id;
private String name;
private Float money;
public Integer getId()
return id;
public void setId(Integer id)
this.id = id;
public String getName()
return name;
public void setName(String name)
this.name = name;
public Float getMoney()
return money;
public void setMoney(Float money)
this.money = money;
@Override
public String toString()
return "Account" +
"id=" + id +
", name='" + name + '\\'' +
", money=" + money +
'';
IAccount
package com.itheima.dao;
import com.itheima.domain.Account;
import java.util.List;
/**
* 账户的持久层接口
*/
public interface IAccountDao
/**
* 查询所有
* @return
*/
List<Account> findAllAccount();
/**
* 查询一个
* @return
*/
Account findAccountById(Integer accountId);
/**
* 保存
* @param account
*/
void saveAccount(Account account);
/**
* 更新
* @param account
*/
void updateAccount(Account account);
/**
* 删除
* @param acccountId
*/
void deleteAccount(Integer acccountId);
/**
* 根据名称查询账户
* @param accountName
* @return 如果有唯一的一个结果就返回，如果没有结果就返回null
* 如果结果集超过一个就抛异常
*/
Account findAccountByName(String accountName);
AccountDaoImpl
/**
* 账户的持久层实现类
*/
public class AccountDaoImpl implements IAccountDao
private QueryRunner runner;
private ConnectionUtils connectionUtils;
public void setRunner(QueryRunner runner)
this.runner = runner;
public void setConnectionUtils(ConnectionUtils connectionUtils)
this.connectionUtils = connectionUtils;
@Override
public List<Account> findAllAccount()
try
return runner.query(connectionUtils.getThreadConnection(),"select * from account",new BeanListHandler<Account>(Account.class));
catch (Exception e)
throw new RuntimeException(e);
@Override
public Account findAccountById(Integer accountId)
try
return runner.query(connectionUtils.getThreadConnection(),"select * from account where id = ? ",new BeanHandler<Account>(Account.class),accountId);
catch (Exception e)
throw new RuntimeException(e);
@Override
public void saveAccount(Account account)
try
runner.update(connectionUtils.getThreadConnection(),"insert into account(name,money)values(?,?)",account.getName(),account.getMoney());
catch (Exception e)
throw new RuntimeException(e);
@Override
public void updateAccount(Account account)
try
runner.update(connectionUtils.getThreadConnection(),"update account set name=?,money=? where id=?",account.getName(),account.getMoney(),account.getId());
catch (Exception e)
throw new RuntimeException(e);
@Override
public void deleteAccount(Integer accountId)
try
runner.update(connectionUtils.getThreadConnection(),"delete from account where id=?",accountId);
catch (Exception e)
throw new RuntimeException(e);
@Override
public Account findAccountByName(String accountName)
try
List<Account> accounts = runner.query(connectionUtils.getThreadConnection(),"select * from account where name = ? ",new BeanListHandler<Account>(Account.class),accountName);
if(accounts == null || accounts.size() == 0)
return null;
if(accounts.size() > 1)
throw new RuntimeException("结果集不唯一，数据有问题");
return accounts.get(0);
catch (Exception e)
throw new RuntimeException(e);
测试类
/**
* 使用Junit单元测试：测试我们的配置
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = "classpath:bean.xml")
public class AccountServiceTest
@Autowired
private IAccountService as;
@Test
public void testTransfer()
as.transfer("aaa","bbb",100f);
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