java - 如何在TableModelEvent中获取JTable

Question

我在 Eclipse 中创建了 Swing GUI，其中有两个 JTable 和 tableChanged 方法。在这种方法中，当我编辑表中的某些单元格并将其发送到项目的逻辑层时，我需要从表中读取数据。问题是如何识别表，它调用此方法，然后对编辑表的行使用正确的 JSON 结构并将其发送。

JTable1:

    Object[] columns = {"ID","Jmeno","Prijmeni","Narozeni","Pozice"};
    JTable userTable = new JTable(new DefaultTableModel(columns, 0));
    scrollPane.setViewportView(userTable);
    userTable.setCellSelectionEnabled(true);
    userTable.setColumnSelectionAllowed(true);
    updateUser();
    userTable.getModel().addTableModelListener((TableModelListener) this);

JTable2:

    Object[] columns = {"EAN","Cena","Nazev","Oddeleni","Sk.Podminky","VytvorenoUzivatelem"};   
    JTable zboziTable = new JTable(new DefaultTableModel(columns, 0));
    scrollPane.setViewportView(zboziTable);
    userTable.setCellSelectionEnabled(true);
    userTable.setColumnSelectionAllowed(true);
    updateZbozi();
    zboziTable.getModel().addTableModelListener((TableModelListener) this);

表更改方法:

    @Override
    public void tableChanged(TableModelEvent e)
    {
        int row          = e.getFirstRow();
        int column       = e.getColumn();
        TableModel model = (TableModel)e.getSource();
        String[] data    = new String[model.getColumnCount()];

        if(column >= 0)
        {
            if(!model.getValueAt(row, column).toString().equals(""))
            {
                for (int i = 0; i < data.length; i++)
                {
                    data[i] = model.getValueAt(row, i).toString();
                }
                //here is JSON structure for userTable
                String jsonData =  "{\"ID\": \"" + data[0] + "\", \"Jmeno\": \"" +  data[1] + "\", \"Prijmeni\": \"" +  data[2] + "\", \"Datum_Narozeni\": \"" + data[3] + "\", \"Pozice\": \"" + data[4] + "\"}";
                WebTarget target = client.target("http://localhost:8080/WSdemo/obchod/editUser");
                target.request().post(Entity.entity(jsonData, MediaType.APPLICATION_JSON),String.class);
            }
            else
                System.out.print("Enter valid text!");
        }
    }   

Answer 1

如果您的 TableModel 扩展 AbstractTableModel ，您可以使用getTableModelListeners()来识别监听的JTable。下面的监听器调用父 Component 的 getName() 方法，但 JComponent 客户端属性可能提供更多自由度。

@Override
public void tableChanged(TableModelEvent e) {
    AbstractTableModel model = (AbstractTableModel) e.getSource();
    TableModelListener[] listeners = model.getTableModelListeners();
    for (TableModelListener listener : listeners) {
        if (listener instanceof JTable) {
            System.out.println(((JTable)listener).getName());
        }
    }
}