1

它不会添加数据，columames 工作，我已经筋疲力尽了，我不知道从这里去哪里。没有错误消息只是不会这样做，它显示的是对象而不是字符串，我也不知道为什么它不起作用，因为 model.addRow() 要求一个对象 [] [] 并且我相信我交付了？

initComponents();
   try {
    PreparedStatement stat = Domein.dConnection().prepareStatement("SELECT domainid , domain FROM nabilpx84_hamchi.dnsp_domains");
        ResultSet resultaat = stat.executeQuery();
        ResultSetMetaData naam = resultaat.getMetaData();

        Object[] kolommen = new Object[2];
        Object[][] data = null ;
        DefaultTableModel model = new DefaultTableModel(null,data);

        // kolom namen          
        for (int i = 1; i <= naam.getColumnCount(); ++i) {
            model.addColumn(naam.getColumnName(i));
        }
        //records

        data = new Object[1][2];

         while(resultaat.next())
        {
            data[0][0] = resultaat.getInt(1);
            data[0][1] = resultaat.getString(2);
            if(resultaat.isFirst())
            {
                model.addRow(data);
            }
        }

        uitvoerTabel.setModel(model);


    } catch (SQLException ex) {
        Logger.getLogger(Domein.class.getName()).log(Level.SEVERE, null, ex);
    }
4

3 回答 3

2

你有一些看起来很时髦的代码，你似乎在你的表模型中添加了两次数据。为什么不创建一个列标题 Vector 或 String 数组且行数为 0 的 DefaultTableModel，然后在 while 循环中添加 Object 数组行或 Vector 行？

此外，您必须为每一行创建一个新的对象数组或向量。你没有在你的while循环中这样做。

就像是：

    ResultSet resultaat = stat.executeQuery();
    ResultSetMetaData naam = resultaat.getMetaData();

    Vector<String> columnVector = new Vector<String>();
     for (int i = 1; i <= naam.getColumnCount(); ++i) {
        columnVector.addElement(naam.getColumnName(i));
    }       


    DefaultTableModel model = new DefaultTableModel(columnVector, 0);

    while(resultaat.next())    {
       // you must create a new Object array or Vector for each row
       Object[] rowData = new Object[2];
       rowData[0] = resultaat.getInt(1);
       rowData[1] = resultaat.getString(2);
       if(resultaat.isFirst()) {  // not sure what this is for
          model.addRow(rowData);
       }
    }

Also, please have a look at Rob Camick's Table from Database blog which you can find here: Table From Database

于 2013-02-20T21:02:32.520 回答
2

You can try something like that:

ResultSetMetaData metaData = rs.getMetaData();

// names of columns
Vector<String> columnNames = new Vector<String>();
int columnCount = metaData.getColumnCount();
for (int column = 1; column <= columnCount; column++) {
    columnNames.add(metaData.getColumnName(column));
}

// data of the table
Vector<Vector<Object>> data = new Vector<Vector<Object>>();
while (rs.next()) {
    Vector<Object> vector = new Vector<Object>();
    for (int columnIndex = 1; columnIndex <= columnCount; columnIndex++) {
        vector.add(rs.getObject(columnIndex));
    }
    data.add(vector);
}

DefaultTableModel model = new DefaultTableModel(data, columnNames);

In another hand, a service layer can helps you to decouple or have a service facade one or more repositories in your Swing application.

于 2013-02-20T21:03:17.380 回答
1

I have my own class and i survive form this head ache if you need to fill any jtable just try this :

SQLGenerat sql  = new SQLGenerat ();
jTable1.setModel(new DefaultTableModel(sql.getRows("SQL code"), sql.getColumns("SQl CODE")));

Here is the Class you can use it 

import java.sql.*;
import java.util.Vector;

/**
 *
 * @author Azad
 */
public class SQLGenerat {
    Connection con;
    Statement  st ;
    ResultSet  rs ;


    public Vector getColumnNames(String sql)
      {
          Vector  columnNames = new Vector();
          /*
           *dont foeget to  wirte your connection 
           *before executing any sql statement
           */
          try{
              st = con.createStatement();
              rs=  st.executeQuery(sql);
              ResultSetMetaData metaData = rs.getMetaData();
              int columns = metaData.getColumnCount();

              while(rs.next())
              {
                  Vector column = new Vector(columns);
                  for(int i = 0 ; i <= columns-1 ; i++){
                      column.addElement(metaData.getColumnName(i));
                  }
                  columnNames.addElement(column);
              }
          }
          catch(SQLException ex)
          {
             System.out.println(ex.getMessage());
          }
          return columnNames;
      }

      public Vector getRowDatas(String sql)
      {
          Vector rowDatas = new Vector ();
           /*
           *dont foeget to  wirte your connection 
           *before executing any sql statement
           */

          try{
              st = con.createStatement();
              rs=st.executeQuery(sql);
              ResultSetMetaData metaData = rs.getMetaData();
              int columns = metaData.getColumnCount();


              while(rs.next())
              {
                  Vector  rows = new Vector(columns);

                  for(int i = 0 ; i <= columns -1 ;i++)
                  {
                      rows.addElement(rs.getObject(i));
                  }
                  rowDatas.addElement(rows);
              }
              rs.close();
              st.close();
          }
          catch(Exception ex)
          {
              System.out.println(ex.getMessage());
          }


          return rowDatas;
      }
}
于 2013-02-20T21:16:50.040 回答