java mysql事务回滚

首先最原生态的com.mysql.jdbc.Driver数据源进行回滚。
1、spring配置文件

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
        destroy-method="close">
        <property name="driverClassName">
            <value>com.mysql.jdbc.Driver</value>
        </property>
        <property name="url">
            <value>jdbc:mysql://127.0.0.1/tbbpm_base?useUnicode=true&characterEncoding=UTF-8</value>
        </property>
        <property name="username">
            <value>root</value>
        </property>
        <property name="password">
            <value>123456</value>
        </property>
        <property name="defaultAutoCommit">
            <value>false</value>
        </property>
    </bean>

2、测试类

package nativeTransaction;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

import javax.sql.DataSource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;


@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:applicationContext.xml" })
public class TestDB {

    /*
     * 注入数据源
     * */
    @Autowired
    protected DataSource dataSource;

    @Test
    public void testRollBack() throws Exception{
        Connection conn = null;
        try {
            conn = dataSource.getConnection();
            PreparedStatement pstam=null;
            conn.setAutoCommit(false);//开启事务
            String sql="delete from bpm_statemachine_instance where id = 62";
            pstam=conn.prepareStatement(sql);
            pstam.executeUpdate();
            conn.rollback();//事务回滚
            conn.commit();//事务提交
        }catch (Throwable e) {
            if (conn != null) {
                conn.rollback();
            }
        }

    }
}

3、测试结果

我们发现执行后，ID=62的数据依然存在，假如去掉

conn.rollback();//事务回滚

后，执行发现数据已经被删除了。说明上面例子的mysql事务回滚成功。