java c datatable,java jdbc 得到像C＃里的datatable一样的表格

public ArrayList> getDataTale2(String sql) throws SQLException {

ArrayList> dt=new ArrayList>();

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 listNames=new ArrayList<>();

for (int c=0;c

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

listNames.add(cName);

}

dt.add(listNames);

while(rs.next()){

ArrayList list=new ArrayList<>();

for (int c=0;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;

}