事务回滚

public class TransDemo {
    public static void main(String[] args)  {
            Connection connection = null;
            connection = DButil.getConnection();
            System.out.println(null==connection);
        try {
            StudentDaoImpl studentDao = new StudentDaoImpl();
            connection.setAutoCommit(false);
            Student student = new Student(14, "小雪", 18, "女", new Date());
            int i = 1/0;
            studentDao.add(student);//添加
            studentDao.delete(6);
            connection.commit();//提交事务
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("事务回滚了");
            try {
                connection.rollback();//如果抛出异常回滚
            } catch (SQLException ex) {
                throw new RuntimeException(ex);
            }
        }


  }

}

返回事务提交的地方

最后

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