您可以尝试如下操作：
//Works fine for me on Windows 7 x64 using JDK 1.7.0_60:import java.awt.*;import java.awt.event.*;import java.util.*;import javax.swing.*;import javax.swing.event.*;import javax.swing.text.*;import javax.swing.undo.*;public final class UndoManagerTest { private final JTextField textField0 = new JTextField("default"); private final JTextField textField1 = new JTextField(); private final UndoManager undoManager0 = new UndoManager(); private final UndoManager undoManager1 = new UndoManager(); public JComponent makeUI() { textField1.setdocument(new CustomUndoPlaindocument()); textField1.setText("aaaaaaaaaaaaaaaaaaaaa"); textField0.getdocument().addUndoableEditListener(undoManager0); textField1.getdocument().addUndoableEditListener(undoManager1); JPanel p = new JPanel(); p.add(new JButton(new AbstractAction("undo") { @Override public void actionPerformed(ActionEvent e) { if (undoManager0.canUndo()) { undoManager0.undo(); } if (undoManager1.canUndo()) { undoManager1.undo(); } } })); p.add(new JButton(new AbstractAction("redo") { @Override public void actionPerformed(ActionEvent e) { if (undoManager0.canRedo()) { undoManager0.redo(); } if (undoManager1.canRedo()) { undoManager1.redo(); } } })); p.add(new JButton(new AbstractAction("setText(new Date())") { @Override public void actionPerformed(ActionEvent e) { String str = new Date().toString(); textField0.setText(str); textField1.setText(str); } })); Box box = Box.createVerticalBox(); box.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5)); box.add(makePanel("Default", textField0)); box.add(Box.createVerticalStrut(5)); box.add(makePanel("replace ignoring undo", textField1)); JPanel pp = new JPanel(new BorderLayout()); pp.add(box, BorderLayout.NORTH); pp.add(p, BorderLayout.SOUTH); return pp; } private static JPanel makePanel(String title, JComponent c) { JPanel p = new JPanel(new BorderLayout()); p.setBorder(BorderFactory.createTitledBorder(title)); p.add(c); return p; } 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 UndoManagerTest().makeUI()); f.setSize(320, 240); f.setLocationRelativeTo(null); f.setVisible(true); }}class CustomUndoPlaindocument extends Plaindocument { private CompoundEdit compoundEdit; @Override protected void fireUndoableEditUpdate(UndoableEditEvent e) { if (compoundEdit == null) { super.fireUndoableEditUpdate(e); } else { compoundEdit.addEdit(e.getEdit()); } } @Override public void replace( int offset, int length, String text, AttributeSet attrs) throws BadLocationException { if (length == 0) { System.out.println("insert"); super.replace(offset, length, text, attrs); } else { System.out.println("replace"); compoundEdit = new CompoundEdit(); super.fireUndoableEditUpdate(new UndoableEditEvent(this, compoundEdit)); super.replace(offset, length, text, attrs); compoundEdit.end(); compoundEdit = null; } }}
