java jdbc 得到像C#里的datatable一样的表格

public ArrayList<ArrayList<String>>    getDataTale2(String sql) throws SQLException {

    ArrayList<ArrayList<String>> dt=new ArrayList<ArrayList<String>>();

    sta =(SQLServerPreparedStatement)con.prepareStatement(sql);

    rs=(SQLServerResultSet)sta.executeQuery();

    SQLServerPreparedStatement stmt = (SQLServerPreparedStatement)con.prepareStatement(sql,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY );
    ResultSet rset = stmt.executeQuery();
    ResultSetMetaData rsmd = rset.getMetaData() ;
    int columnCount = rsmd.getColumnCount();

    ArrayList<String> listNames=new ArrayList<>();
    for (int c=0;c<columnCount;c++){

        String cName=rsmd.getColumnName(c+1);

        listNames.add(cName);

    }
    dt.add(listNames);
    while(rs.next()){

        ArrayList<String> list=new ArrayList<>();

        for (int c=0;c<columnCount;c++){

            String cName=rsmd.getColumnName(c+1);

            list.add(rs.getString(cName));

        }

        dt.add(list);
    }
    rset.close();

    if (rs != null) {
        rs.close();
        rs = null;
    }
    if (sta != null) {
        sta.close();
        sta = null;
    }
    if (con != null) {
        con.close();
        con = null;
    }
    return dt;

}