用'.txt'文件中的值填充'JTable'

Question

我是Java新手，我有一个像这样的文本文件

0784879541|P. K.|Tharindu|745874654v|Colombo|
0714786542|H. R.|Kamal|654124784v|Colombo|
0114784544|H. P.|Gamage|6847654127v|Kandy|

我想用此文本文件中的数据填充“ jTable”。下面是到目前为止我的代码不起作用。当我执行程序时，表上没有任何显示。

private void formWindowOpened(java.awt.event.WindowEvent evt) {                                  
    String line = null;
    DefaultTableModel dtm = (DefaultTableModel) PhoneBookTable.getModel();

    try {
        BufferedReader br = new BufferedReader(new FileReader(file));
        StringTokenizer st1 = new StringTokenizer(br.readLine(), "|");
        while (st1.hasMoreTokens()) {
            columns.addElement(st1.nextToken());
        }
        while ((line = br.readLine()) != null) {
            StringTokenizer st2 = new StringTokenizer(line, "|");
            while (st2.hasMoreTokens()) {
                data.addElement(st2.nextToken());
            }
        }
        br.close();
        dtm.addRow(new Object[]{columns, data});//add here 
    } catch (Exception e) {
        e.printStackTrace();
    }

}

有人可以帮帮我吗？

Answer 1

您需要将其更改为以下内容。data = new Vector();每次读取新行时，都需要重置矢量，否则它包含第一行+第二行+以此类推。您还可以调用dtm.setRowCount(0);以避免初始行为空。并且您只需要添加行，您的注释[单元格包含很多列]的问题是由于
dtm.addRow(new Object[]{columns, data})使用dtm.addRow(data);而引起的，问题将得到解决

码

private void formWindowOpened(java.awt.event.WindowEvent evt) {
        String line = null;
        DefaultTableModel dtm = (DefaultTableModel) PhoneBookTable.getModel();

        try {
            BufferedReader br = new BufferedReader(new FileReader(file));

            while ((line = br.readLine()) != null) {
                data = new Vector();// this is important
                StringTokenizer st1 = new StringTokenizer(line, "|");
                while (st1.hasMoreTokens()) {
                    String nextToken = st1.nextToken();
                    data.add(nextToken);
                    System.out.println(nextToken);

                }
                System.out.println(data);
                dtm.addRow(data);//add here 
                System.out.println(".................................");
            }

            br.close();

        } catch (Exception e) {
            e.printStackTrace();
        }

    }