src/org/nutz/dao/impl/NutTxDao.java
public void close() {
        if (debug)
            log.debugf("close id=%s", id);
        try {
            if (conn == null)
                return;
            if (_autoCommit)
                conn.setAutoCommit(true);
            conn.close();
            conn = null;
        }
        catch (Throwable e) {
        }
    }
public void close() {
        if (debug)
            log.debugf("close id=%s", id);
        try {
            if (conn == null)
                return;
            if (_autoCommit)
                conn.setAutoCommit(true);
            conn.close();
            conn = null;
        }
        catch (Throwable e) {
        }
    }
关闭事务及连接