src/org/nutz/trans/NutTransaction.java
@Override
    protected void rollback() {
        for (ConnInfo cInfo : list) {
            try {
                cInfo.conn.rollback();
            }
            catch (Throwable e) {}
        }
    }
@Override
    protected void rollback() {
        for (ConnInfo cInfo : list) {
            try {
                cInfo.conn.rollback();
            }
            catch (Throwable e) {}
        }
    }
执行回滚操作