这是我的测试代码：
import java.awt.*;import java.awt.event.*;import java.util.*;import javax.swing.*;import javax.swing.event.*;import javax.swing.table.*;public class MultiLineCellEditorTest { public JComponent makeUI() { String[] columnNames = {"JTextField", "Jtextarea"}; Object[][] data = { {"aaa", "Jtextarea+JScrollPanenCtrl-Enter: stopCellEditing"}, {"bbb", "ggg"}, {"ccccDDD", "hhhnjjjnkkk"} }; TableModel model = new DefaultTableModel(data, columnNames) { @Override public Class<?> getColumnClass(int column) { return String.class; } }; JTable table = new JTable(model) { @Override public void updateUI() { super.updateUI(); TableColumn col = getColumnModel().getColumn(1); col.setCellEditor(new textareaCellEditor()); col.setCellRenderer(new textareaCellRenderer()); } }; table.setAutoCreateRowSorter(true); table.setSurrendersFocusonKeystroke(true); table.setRowHeight(64); return new JScrollPane(table); } public static void main(String... args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { createAndShowGUI(); } }); } public static void createAndShowGUI() { Jframe f = new Jframe(); f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); f.getContentPane().add(new MultiLineCellEditorTest().makeUI()); f.setSize(320, 240); f.setLocationRelativeTo(null); f.setVisible(true); }}class textareaCellRenderer implements TableCellRenderer { private final Jtextarea textarea = new Jtextarea(); public textareaCellRenderer() { textarea.setLineWrap(true); textarea.setBorder(BorderFactory.createEmptyBorder(1, 5, 1, 5)); } @Override public Component getTableCellRendererComponent( JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { if (isSelected) { textarea.setForeground(table.getSelectionForeground()); textarea.setBackground(table.getSelectionBackground()); } else { textarea.setForeground(table.getForeground()); textarea.setBackground(table.getBackground()); } textarea.setFont(table.getFont()); textarea.setText(Objects.toString(value, "")); return textarea; }}//class textareaCellEditor extends AbstractCellEditor implements TableCellEditor {class textareaCellEditor implements TableCellEditor { private static final String KEY = "Stop-Cell-Editing"; private final JScrollPane scroll; private final Jtextarea textarea = new Jtextarea(); public textareaCellEditor() { //super(); scroll = new JScrollPane(textarea); scroll.setBorder(BorderFactory.createEmptyBorder()); textarea.setLineWrap(true); textarea.setBorder(BorderFactory.createEmptyBorder(1, 5, 1, 5)); KeyStroke enter = KeyStroke.getKeyStroke( KeyEvent.VK_ENTER, InputEvent.CTRL_MASK); textarea.getInputMap(JComponent.WHEN_FOCUSED).put(enter, KEY); textarea.getActionMap().put(KEY, new AbstractAction() { @Override public void actionPerformed(ActionEvent e) { stopCellEditing(); } }); } @Override public Object getCellEditorValue() { return textarea.getText(); } @Override public Component getTableCellEditorComponent( JTable table, Object value, boolean isSelected, int row, int column) { System.out.println("2. getTableCellEditorComponent"); textarea.setFont(table.getFont()); textarea.setText(Objects.toString(value, "")); EventQueue.invokeLater(new Runnable() { @Override public void run() { textarea.setCaretPosition(textarea.getText().length()); textarea.requestFocusInWindow(); System.out.println("4. invokeLater: getTableCellEditorComponent"); } }); return scroll; } @Override public boolean isCellEditable(final EventObject e) { if (e instanceof MouseEvent) { return ((MouseEvent) e).getClickCount() >= 2; } System.out.println("1. isCellEditable"); EventQueue.invokeLater(new Runnable() { @Override public void run() { if (e instanceof KeyEvent) { KeyEvent ke = (KeyEvent) e; char kc = ke.getKeyChar(); if (Character.isUnipreIdentifierStart(kc)) { textarea.setText(textarea.getText() + kc); System.out.println("3. invokeLater: isCellEditable"); } } } }); return true; } //Copid from AbstractCellEditor protected EventListenerList listenerList = new EventListenerList(); transient protected ChangeEvent changeEvent = null; @Override public boolean shouldSelectCell(EventObject e) { return true; } @Override public boolean stopCellEditing() { fireEditingStopped(); return true; } @Override public void cancelCellEditing() { fireEditingCanceled(); } @Override public void addCellEditorListener(CellEditorListener l) { listenerList.add(CellEditorListener.class, l); } @Override public void removeCellEditorListener(CellEditorListener l) { listenerList.remove(CellEditorListener.class, l); } public CellEditorListener[] getCellEditorListeners() { return listenerList.getListeners(CellEditorListener.class); } protected void fireEditingStopped() { // Guaranteed to return a non-null array Object[] listeners = listenerList.getListenerList(); // Process the listeners last to first, notifying // those that are interested in this event for(int i = listeners.length-2; i>=0; i-=2) { if(listeners[i]==CellEditorListener.class) { // Lazily create the event: if(changeEvent == null) changeEvent = new ChangeEvent(this); ((CellEditorListener)listeners[i+1]).editingStopped(changeEvent); } } } protected void fireEditingCanceled() { // Guaranteed to return a non-null array Object[] listeners = listenerList.getListenerList(); // Process the listeners last to first, notifying // those that are interested in this event for(int i = listeners.length-2; i>=0; i-=2) { if(listeners[i]==CellEditorListener.class) { // Lazily create the event: if(changeEvent == null) changeEvent = new ChangeEvent(this); ((CellEditorListener)listeners[i+1]).editingCanceled(changeEvent); } } }}编辑：用委托替换继承
