src/org/nutz/trans/NutTransaction.java
@Override
    public Connection getConnection(DataSource dataSource) throws SQLException {
        for (ConnInfo p : list)
            if (p.ds == dataSource)
                return p.conn;
        Connection conn = dataSource.getConnection();
        // System.out.printf("=> %s\n", conn.toString());
        boolean restoreAutoCommit = false;
        if (conn.getAutoCommit()) {
            conn.setAutoCommit(false);
            restoreAutoCommit = true;
        }
        // Store conn, it will set the trans level
        list.add(new ConnInfo(dataSource, conn, getLevel(), restoreAutoCommit));
        return conn;
    }
@Override
    public Connection getConnection(DataSource dataSource) throws SQLException {
        for (ConnInfo p : list)
            if (p.ds == dataSource)
                return p.conn;
        Connection conn = dataSource.getConnection();
        // System.out.printf("=> %s\n", conn.toString());
        boolean restoreAutoCommit = false;
        if (conn.getAutoCommit()) {
            conn.setAutoCommit(false);
            restoreAutoCommit = true;
        }
        // Store conn, it will set the trans level
        list.add(new ConnInfo(dataSource, conn, getLevel(), restoreAutoCommit));
        return conn;
    }
从数据源获取连接