如何开启mysql的事务支持

1，编程式事务管理（jdbc的事务是绑定在connection上的）

Connection conn = null;
try
{
Class.forName("com.mysql.jdbc.Driver");
conn = DriverManager.getConnection("jdbc:oracle:thin:@host:1521:SID","username","password");
conn.setAutoCommit(false);                        //取消自动提交
PreparedStatement ps = conn.prepareCall("update something");
ResultSet rs = ps.executeQuery();
conn.commit();                                    //手动提交

}
catch (Exception e)
{
conn.rollback();
e.printStackTrace();
}
finally
{
conn.close();
}

2，声明式事务
先在工程的application.xml配置文件中添加如下代码，开启事务

<!-- 声明式事务控制配置 -->
<tx:annotation-driven transaction-manager="txManager"/>

<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="datasource" ref="bassDataSource"></property>
</bean>
然后在你需要开启事务的接口前面添加注解
@Transactional(rollbackFor = IOException.class)
public void add(String name) throws IOException
{
System.out.println("可以再类里和方法里面添加事务注解0~0");
throw new IOException();
}
直接调用接口方法就好

分布式事务处理（mysql貌似在5.X之后才支持） 的话，
1.可以直接使用spring+atomikos框架进行管理
参考：http://blog.chinaunix.net/uid-21162795-id-3424973.html
就不贴测试代码了，自己看着配置吧

2，使用JTA（Java Transaction API）进行分布式事务管理（测试代码如下）
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import javax.naming.InitialContext;
import javax.sql.DataSource;
import javax.transaction.SystemException;
import javax.transaction.UserTransaction;

import com.mysql.jdbc.jdbc2.optional.MysqlDataSource;

//分布式事务处理
public class transferAccount
{
@SuppressWarnings("null")
public  void testTransferAccount()
{
UserTransaction userts = null;
Connection connA = null;
PreparedStatement psA = null;
InitialContext context = null;
Connection connB = null;
PreparedStatement psB = null;

try
{
//获得事务管理对象
userts = (UserTransaction) context.lookup("java:comp/UserTransaction");
//获取两个数据库
connA = getDataSourceA().getConnection();
connB = getDataSourceB().getConnection();
//开启事务
userts.begin();
//sql语句
psA = connA.prepareStatement("我加1");
psB = connB.prepareStatement("我减1");
//执行sql
psA.executeUpdate();
psB.executeUpdate();
//事务提交
userts.commit();

} catch (Exception e)
{
try
{
userts.rollback();
} catch (IllegalStateException | SecurityException
| SystemException e1)
{
e1.printStackTrace();
}
e.printStackTrace();
}
finally
{
try
{
psA.close();
psB.close();
connA.close();
connB.close();
} catch (SQLException e)
{
e.printStackTrace();
}
}
}

public DataSource getDataSourceA()
{
MysqlDataSource dataSource = new MysqlDataSource();
dataSource.setDatabaseName("mysql");
dataSource.setServerName("server");
dataSource.setPortNumber(1433);
dataSource.setUser("test");
dataSource.setPassword("test");
return dataSource;
}

public DataSource getDataSourceB()
{
MysqlDataSource dataSource = new MysqlDataSource();
dataSource.setDatabaseName("mysql");
dataSource.setServerName("server");
dataSource.setPortNumber(1435);
dataSource.setUser("test1");
dataSource.setPassword("test1");
return dataSource;
}