JTable中的''刷新''数据

时间:2017-01-21 19:52:34

标签: java swing jtable

我正在制作一个GUI并且它包含一个JPanel,在JPanel内部有一个JTable,我想要做的是:当我点击一个按钮时,它们都会出现(因为我正在使用CardLayout)。代码:

    private void teGjithaButtonActionPerformed(java.awt.event.ActionEvent evt) {                                               
    try {
        parentPanel.setVisible(true);
        parentPanel.removeAll();
        parentPanel.add(tgjPanel);
        parentPanel.repaint();
        parentPanel.revalidate();
        listAllCurtains();
    } catch (SQLException ex) {
        Logger.getLogger(MainBrillant.class.getName()).log(Level.SEVERE, null, ex);
    }
}  

listAllCurtains()的代码:

 DefaultTableModel deftm = (DefaultTableModel) allTable.getModel();

    if (deftm.getRowCount() != 0) {
        deftm.setRowCount(0);
    }

    stm = (Statement) conn.createStatement();
    ResultSet rs = stm.executeQuery("select * from customerregister.curtain inner join curtainrel on curtain.code = curtainrel.curtainCode;");
    while (rs.next()) {
        String shifra = rs.getString("code");
        String ngjyra = rs.getString("color");
        String emri = rs.getString("name");
        double cmimi = rs.getDouble("price");
        double sasia = rs.getDouble("amount");
        allCurtains.add(new Curtain(shifra, ngjyra, emri, cmimi, sasia));
    }

    Object[] row = new Object[5];
    for (int i = 0; i < allCurtains.size(); i++) {
        row[0] = allCurtains.get(i).getShifra();
        row[1] = allCurtains.get(i).getEmri();
        row[2] = allCurtains.get(i).getNgjyra();
        row[3] = allCurtains.get(i).getCmimi();
        row[4] = allCurtains.get(i).getSasia();
        deftm.addRow(row);
    }

}

问题在于,当我重新点击按钮时,尽管有这部分代码可以确保数据不重复:

if (deftm.getRowCount() != 0) {
        deftm.setRowCount(0);
    }

每次单击按钮时,它仍然会继续将相同的数据插入表中。我无法弄清楚为什么会这样,我真的很感谢你的帮助。

1 个答案:

答案 0 :(得分:1)

在您决定再次重新发布数据之前,可能应该清除其行的JTable模型。而不是你的:

if (deftm.getRowCount() != 0) {
    deftm.setRowCount(0);
}

代码,也许使用简单的 clearTable()方法,如:

private void clearJTable(DefaultTableModel yourTableModel) {
    while (yourTableModel.getRowCount() > 0) {
        for (int i = 0; i < yourTableModel.getRowCount(); i++) {
            yourTableModel.removeRow(i);
        }
    }
}

然后在你的代码中:

DefaultTableModel deftm = (DefaultTableModel) allTable.getModel();

    clearJTable(deftm);

    stm = (Statement) conn.createStatement();
    ResultSet rs = stm.executeQuery("select * from customerregister.curtain inner join curtainrel on curtain.code = curtainrel.curtainCode;");
    while (rs.next()) {
        String shifra = rs.getString("code");
        String ngjyra = rs.getString("color");
        String emri = rs.getString("name");
        double cmimi = rs.getDouble("price");
        ....................................
        ....................................
        ....................................