java - mybatis怎么处理事务问题

Question

我用的mybatis是基于SqlSessionTemplate实现的，如下：

@Repository("daoSupport")
public class DaoSupport implements BaseDAO {

    @Resource(name = "sqlSessionTemplate")
    private SqlSessionTemplate sqlSessionTemplate;
    
    /**
     * 保存对象
     * @param str
     * @param obj
     * @return
     * @throws Exception
     */
    public Object save(String str, Object obj){
        return sqlSessionTemplate.insert(str, obj);
    }
    
    /**
     * 批量更新
     * @param str
     * @param obj
     * @return
     * @throws Exception
     */
    public Object batchSave(String str, List objs){
        return sqlSessionTemplate.insert(str, objs);
    }
    
    /**
     * 修改对象
     * @param str
     * @param obj
     * @return
     * @throws Exception
     */
    public Object update(String str, Object obj){
        Integer count=sqlSessionTemplate.update(str, obj);

@Service

public class OrderInfoService  {

    @Resource(name = "daoSupport")
    private DaoSupport dao;
        
    
    @SuppressWarnings("unchecked")
    public List<PageData> getPerson() {
         List<PageData> a =(List<PageData>)dao.findAllList(
                    "OrderInfoMapper.getOrderInfo");
         return a;
            
        }
    public void save(PageData pd){
        dao.save("OrderInfoMapper.saveOrderInfo", pd);
    }
    public void update(PageData pd){
        dao.update("OrderInfoMapper.updateOrder", pd);
    }
    
    @SuppressWarnings("unchecked")
    public List<PageData> list(PageData pd){
        return (List<PageData>)dao.findForList("OrderInfoMapper.getOrderInfo", pd);
    }

在xml文件里面写对应sql的Mapper，
我想在调用service层的方法操作数据库时，几条sql语句同时commit，其中有一条失败则全部不执行，就和jdbc那样先设置不自动commit，然后在commit那种，要在哪里配置或调用啥方法实现？

Answer 1

请百度spring的事务管理

第一种，配置事务管理的规则，具体怎么写可以再百度，一两句说不清

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <aop:config>
        <aop:pointcut id="interceptorPointCuts" expression="execution(* com.web..*.services..*Impl.*(..))"/>
        <aop:advisor advice-ref="txAdvice" pointcut-ref="interceptorPointCuts"/>
    </aop:config>
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="save*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
            <tx:method name="update*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
            <tx:method name="insert*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
            <tx:method name="delete*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>for="java.lang.Exception"/> -->
        </tx:attributes>
    </tx:advice>

第二种使用注解@Transactional

   <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--声明使用注解式事务-->
    <tx:annotation-driven transaction-manager="transactionManager"/>

Answer 2

Programmatic Transaction Management MyBatis SqlSession provides you
with specific methods to handle transactions programmatically. But
when using MyBatis-Spring your beans will be injected with a Spring
managed SqlSession or a Spring managed mapper. That means that Spring
will always handle your transactions.

You cannot call SqlSession.commit(), SqlSession.rollback() or
SqlSession.close() over a Spring managed SqlSession. If you try to do
so, a UnsupportedOperationException exception will be thrown. Note
these methods are not exposed in injected mapper classes.

Regardless of your JDBC connection's autocommit setting, any execution
of a SqlSession data method or any call to a mapper method outside a
Spring transaction will be automatically committed.

If you want to control your transactions programmatically please refer
to chapter 10.6 of the Spring reference manual. This code shows how to
handle a transaction manually using the PlatformTransactionManager
described in section 10.6.2.

mybatis-spring

Answer 3

Spring好像不允许手动提交事务，Spring容器会自动管理事务！

Answer 4

//使用事务处理，订单及货物订单必须同时插进2个表里面
@Transactional(rollbackFor=Exception.class)
public void save(PageData pd,Map<String,Integer> map,String uuid,int Uid){
    dao.save("OrderInfoMapper.saveOrderInfo", pd);
    OrderGood orderGood=new OrderGood();
    for(String gid:map.keySet()){
        Goods good=goodService.findOne(gid);
        orderGood.setGname(good.getGname());
        //Integer a=map.get(gid);
        orderGood.setOgamount(map.get(gid));
        orderGood.setGid(Integer.parseInt(gid));                
        orderGood.setOgtotalprize(map.get(gid)*good.getGprice());
        orderGood.setUid(Uid);
        orderGood.setOid(uuid);
        dao.save("OrderInfoMapper.saveOrderGood", orderGood);
        }          
               
}
使用@Transactional  注解则成功解决问题，此注解是spring 的事务管理，使用前先配置如下：

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--声明使用注解式事务-->
    <tx:annotation-driven transaction-manager="transactionManager"/>
        
    
    
    只需要在service层方法中执行多条mybatis的mapper并加上注解即可，发生异常则此方法的事务会回滚