Question

当我尝试将值写入csv文件时遇到麻烦，我只获取默认值。内部添加按钮动作监听器我有循环，只显示默认从列模型设置在顶部，我没有任何想法所以请帮助。

编辑：我在食物日志中有这个值并且它们显示正确，但在log.csv中它们不存在

    /*
     * Creating default model and adding labels for food nutrients
     */
    columnModel = new DefaultTableModel();

    columnModel.addColumn("Name");
    columnModel.addColumn("Unit Amount");
    columnModel.addColumn("Calories");
    columnModel.addColumn("Fat");
    columnModel.addColumn("Protein");
    columnModel.addColumn("Carbs");

    recordBoard = new JTable(columnModel);
    recordBoard.setPreferredScrollableViewportSize(recordBoard.getPreferredSize());
    recordBoard.setFillsViewportHeight(true);
    JTableHeader header = recordBoard.getTableHeader();
    add(header);
    add(recordBoard);

    JPanel logButton = new JPanel();
    logButton.setLayout(new BoxLayout(logButton, BoxLayout.X_AXIS));

    /*
     * Creating search text field for all foods
     */
    JLabel comboBoxLabel = new JLabel("Search all Foods: ", JLabel.RIGHT);
    csvFoods = new JComboBox();
    logButton.add(comboBoxLabel);
    logButton.add(csvFoods);

    /*
     * Creating new button for saveing food records
     */
    recordSave = new JButton("Add Food");
    recordSave.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            controller.addLogRow(String.valueOf(csvFoods.getSelectedItem()), columnModel);

            try {
                columnModel = (DefaultTableModel) recordBoard.getModel();
                FileWriter fw = new FileWriter(new File("log.csv"), true);
                Calendar cal = Calendar.getInstance();
                recordBoard.getTableHeader().setUI(null);;
                fw.write("\n");
                fw.write(cal.get(Calendar.YEAR) + ",");
                fw.write(cal.get(Calendar.MONTH) + 1 + ",");
                fw.write(cal.get(Calendar.DATE) + ",");
                fw.write("f" + ",");
                for (int i = 0; i <= 5; i++) {
                    fw.write(columnModel.getColumnName(i) + ",");
                }
                fw.write("\n");
                fw.close();
            } catch (IOException e1) {
                e1.printStackTrace(); 
            }
        }
    });

Answer 1

您正在访问表的列名，而不是内容本身。

要打印内容，您应该遍历每一行数据，并在每行内，遍历每一列：

for(int i = 0; i < columnModel.getRowCount(); i++) {
   for(int j = 0; j < columnModel.getColumnCount(); j++) {
       Object data = columnModel.getValueAt(i, j);
       // print to file
   }
}

写入日志文件doesent show walues

1 个答案: