java - mybatis怎么處理事務問題

問題描述

我用的mybatis是基于SqlSessionTemplate實現的，如下：

@Repository('daoSupport')public class DaoSupport implements BaseDAO { @Resource(name = 'sqlSessionTemplate') private SqlSessionTemplate sqlSessionTemplate;/** * 保存對象 * @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); }/** * 修改對象 * @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文件里面寫對應sql的Mapper，我想在調用service層的方法操作數據庫時，幾條sql語句同時commit，其中有一條失敗則全部不執行，就和jdbc那樣先設置不自動commit，然后在commit那種，要在哪里配置或調用啥方法實現？

問題解答

請百度spring的事務管理

第一種，配置事務管理的規則，具體怎么寫可以再百度，一兩句說不清

<bean class='org.springframework.jdbc.datasource.DataSourceTransactionManager'><property name='dataSource' ref='dataSource'/> </bean> <aop:config><aop:pointcut expression='execution(* com.web..*.services..*Impl.*(..))'/><aop:advisor advice-ref='txAdvice' pointcut-ref='interceptorPointCuts'/> </aop:config> <tx:advice 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>

第二種使用注解@Transactional

<bean class='org.springframework.jdbc.datasource.DataSourceTransactionManager'><property name='dataSource' ref='dataSource'/> </bean> <!--聲明使用注解式事務--> <tx:annotation-driven transaction-manager='transactionManager'/>回答2：

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

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

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

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

mybatis-spring

Spring好像不允許手動提交事務，Spring容器會自動管理事務！

//使用事務處理，訂單及貨物訂單必須同時插進2個表里面@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 注解則成功解決問題，此注解是spring 的事務管理，使用前先配置如下：

<bean class='org.springframework.jdbc.datasource.DataSourceTransactionManager'><property name='dataSource' ref='dataSource'/> </bean> <!--聲明使用注解式事務--> <tx:annotation-driven transaction-manager='transactionManager'/> 只需要在service層方法中執行多條mybatis的mapper并加上注解即可，發生異常則此方法的事務會回滾