resultset的问题

      rs = conn.executeQuery(sql);
      int k=0;
      k=rs.getMetaData().getColumnCount();
      System.out.println(k);
      for(int iii=0;iii<=k;iii++){
          Vector tempList = new Vector();
          String www=rs.getString(iii);
          System.out.println(www);
      }
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