@Autowired
  PlatformTransactionManager platformTransactionManager;
  @Autowired
  TransactionDefinition transactionDefinition;
public void testTransaction() {

    //开启事务
    TransactionStatus transactionStatus = platformTransactionManager.getTransaction(transactionDefinition);
    try {
      CategoryInfo categoryInfo1=new CategoryInfo();
      categoryInfo1.setName("分类1");
      categoryDataDao.add(categoryInfo1);
      //模拟发生异常,事务回滚后应该数据库两条记录都没有
      int i=1/0;
      CategoryInfo categoryInfo2=new CategoryInfo();
      categoryInfo2.setName("分类2");
      categoryDataDao.add(categoryInfo2);
      //提交事务
      platformTransactionManager.commit(transactionStatus);
    } catch (Exception e) {
      logger.error("发生异常事务回滚");
      platformTransactionManager.rollback(transactionStatus);
    }
  }