JTable单元格无法获取最新更新值的问题求助

我正在开发Java Swing UI，使用JTable允许用户更新Attribute值。更新Age时，内部会触发setValueAt方法完成更新，但更新第二个值Name后直接点击Save按钮，却无法获取Name的最新更新值。原因是只有在点击离开Name所在行时，才会内部触发setValueAt方法。请问有没有办法在点击按钮时触发该方法，以便获取最新值？

编辑补充 #

Model类 #

public class StudentModel extends AbstractTableModel {
    private static final long serialVersionUID = 1L;
    private final Map<String, String> userProperty = new HashMap<>();
    private final String[] header = new String[]{"Attribute Name", "Attribute Value"};
    private String[] keys;

    public StudentModel(Map<String, String> attributeMap) {
        this.userProperty.putAll(attributeMap);
        keys = this.userProperty.keySet().toArray(new String[this.userProperty.size()]);
    }

    @Override
    public int getRowCount() {
        return userProperty.size();
    }

    @Override
    public int getColumnCount() {
        return header.length;
    }

    @Override
    public String getColumnName(int col) {
        if (col == 0) {
            return header[0];
        } else {
            return header[1];
        }
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        if (columnIndex == 0) {
            return keys[rowIndex];
        } else {
            return userProperty.get(keys[rowIndex]);
        }
    }

    public void removeAllRows() {
        this.userProperty.clear();
        keys = this.userProperty.keySet().toArray(new String[this.userProperty.size()]);
    }

    public void addRow(Map<String, String> newRows) {
        this.userProperty.putAll(newRows);
        keys = this.userProperty.keySet().toArray(new String[this.userProperty.size()]);
    }

    public void updateTable() {
        fireTableDataChanged();
    }

    @Override
    public boolean isCellEditable(int row, int column) {
        return column == 1;
    }

    @Override
    public void setValueAt(Object value, int row, int col) {
        userProperty.put(keys[row], String.valueOf(value));
        fireTableCellUpdated(row, col);
    }

    public Map<String, String> getAttributeMap() {
        return userProperty;
    }
}

UI类 #

public class JTableDemo2 extends JFrame implements ActionListener {
    private JButton addBtn;
    private JButton resetBtn;
    private JTable jtable;
    private StudentModel studentModel;

    private JTableDemo2() {
        setBounds(300, 200, 550, 400);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent we) {
                dispose();
            }
        });
        initializeComponent();
    }

    void initializeComponent() {
        JPanel panel = new JPanel();
        studentModel = new StudentModel(getDummyData());
        addBtn = new JButton("Save");
        addBtn.addActionListener(this);
        resetBtn = new JButton("Close");
        resetBtn.addActionListener(this);
        jtable = new JTable(studentModel);
        panel.add(new JScrollPane(jtable));
        panel.add(addBtn);
        panel.add(resetBtn);
        add(panel);
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        JTableDemo2 object = new JTableDemo2();
        object.setVisible(true);
    }

    private Map<String, String> getDummyData() {
        Map<String, String> rowData = new HashMap<>();
        rowData.put("Age", "");
        rowData.put("Name", "");
        return rowData;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == addBtn) {
            System.out.println("studentModel.getAttributeMap() :" + studentModel.getAttributeMap());
        }
    }
}

点击按钮后的输出 #

控制台输出：studentModel.getAttributeMap() :{Age=18, Name=}，可见Name的最新输入值未被保存到Model中。

解决方案 #

修改UI类中的actionPerformed方法，在获取数据前强制结束当前单元格的编辑：

@Override
public void actionPerformed(ActionEvent e) {
    if (e.getSource() == addBtn) {
        // 强制结束当前单元格编辑，确保修改提交到Model
        if (jtable.isEditing()) {
            jtable.getCellEditor().stopCellEditing();
        }
        System.out.println("studentModel.getAttributeMap() :" + studentModel.getAttributeMap());
    } else if (e.getSource() == resetBtn) {
        dispose();
    }
}

原理 #

JTable默认仅在单元格失去焦点（如点击其他行、组件）时，才会调用单元格编辑器的stopCellEditing()方法，将编辑内容提交到TableModel。直接点击Save按钮时，编辑的单元格仍处于激活状态，修改未提交，因此Model中还是旧值。主动调用stopCellEditing()可强制提交当前编辑内容，确保获取到最新值。

内容的提问来源于stack exchange，提问作者user21528347