Java字符串replaceAll（）

我一直在想，例如：

JTextPane chatTextArea = new JTextPane(); s.replaceAll(":\\)", emoticon()); public String emoticon(){ chatTextArea.insertIcon(new ImageIcon(ChatFrame.class.getResource("/smile.png"))); return "`"; } 

可以放一张图片和“`”到处“:)”被找到。 当我像这样运行它时如果s包含“:)”那么整个s只会被图标替换掉。 有办法吗？

Answer 1

这是我做的一个小例子（原始的+1到@StanislavL），只使用DocumentListener并检查何时输入表情符号的匹配序列并用适当的图像替换它：

注意：必须按下SPACE键或键入其他字符/表情符号才能显示图像

 import java.awt.Dimension; import java.awt.Image; import java.net.URL; import javax.imageio.ImageIO; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.SwingUtilities; import javax.swing.event.DocumentEvent; import javax.swing.event.DocumentListener; import javax.swing.text.AbstractDocument; import javax.swing.text.BadLocationException; import javax.swing.text.SimpleAttributeSet; import javax.swing.text.StyleConstants; import javax.swing.text.StyledDocument; import javax.swing.text.Utilities; public class JTextPaneWithEmoticon { private JFrame frame; private JTextPane textPane; static ImageIcon smiley, sad; static final String SMILEY_EMOTICON = ":)", SAD_EMOTICON = ":("; String[] emoticons = {SMILEY_EMOTICON, SAD_EMOTICON}; private void initComponents() { frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); textPane = new JTextPane(); //add docuemntlistener to check for emoticon insert ie :) ((AbstractDocument) textPane.getDocument()).addDocumentListener(new DocumentListener() { @Override public void insertUpdate(final DocumentEvent de) { //We should surround our code with SwingUtilities.invokeLater() because we cannot change document during mutation intercepted in the listener. SwingUtilities.invokeLater(new Runnable() { public void run() { try { StyledDocument doc = (StyledDocument) de.getDocument(); int start = Utilities.getRowStart(textPane, Math.max(0, de.getOffset() - 1)); int end = Utilities.getWordStart(textPane, de.getOffset() + de.getLength()); String text = doc.getText(start, end - start); for (String emoticon : emoticons) {//for each emoticon int i = text.indexOf(emoticon); while (i >= 0) { final SimpleAttributeSet attrs = new SimpleAttributeSet(doc.getCharacterElement(start + i).getAttributes()); if (StyleConstants.getIcon(attrs) == null) { switch (emoticon) {//check which emtoticon picture to apply case SMILEY_EMOTICON: StyleConstants.setIcon(attrs, smiley); break; case SAD_EMOTICON: StyleConstants.setIcon(attrs, sad); break; } doc.remove(start + i, emoticon.length()); doc.insertString(start + i, emoticon, attrs); } i = text.indexOf(emoticon, i + emoticon.length()); } } } catch (BadLocationException ex) { ex.printStackTrace(); } } }); } @Override public void removeUpdate(DocumentEvent e) { } @Override public void changedUpdate(DocumentEvent e) { } }); JScrollPane scrollPane = new JScrollPane(textPane); scrollPane.setPreferredSize(new Dimension(300, 300)); frame.add(scrollPane); frame.pack(); frame.setVisible(true); } public static void main(String[] args) { try {//attempt to get icon for emoticons smiley = new ImageIcon(ImageIO.read(new URL("http://facelets.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/e/m/emoticons0001.png")).getScaledInstance(24, 24, Image.SCALE_SMOOTH)); sad = new ImageIcon(ImageIO.read(new URL("http://zambia.primaryblogger.co.uk/files/2012/04/sad.jpg")).getScaledInstance(24, 24, Image.SCALE_SMOOTH)); } catch (Exception ex) { ex.printStackTrace(); } SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new JTextPaneWithEmoticon().initComponents(); } }); } } 

参考文献：

• 如何在java swing中添加表情符号？