處理超鏈接在JTextPane上右鍵單擊

Question

我試圖在我的程序中檢測JTextPane中超鏈接的右鍵單擊。網上沒有關於這個問題。有人能幫我嗎？

public class rchltest extends Applet { 

    public void init() { 

     JPanel panel = new JPanel(false); 

     JEditorPane gentextp = new JTextPane(); 
     JScrollPane scrollPane = new JScrollPane(gentextp); 
     panel.add(scrollPane); 
     scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
     gentextp.setContentType("text/html"); 
     gentextp.setEditable(false); 
     gentextp.addHyperlinkListener(new texthll()); 
     gentextp.setPreferredSize(new Dimension(500, 400)); 
     gentextp.setText("Here is a <a href='http://A'>hyperlink</a>"); 

     this.add(panel); 

    } 
} 

class texthll implements HyperlinkListener { 

     public void hyperlinkUpdate(HyperlinkEvent event) { 
     if (event.getEventType() == HyperlinkEvent.EventType.ACTIVATED) { 
      JEditorPane pane = (JEditorPane)event.getSource(); 

      URL url = event.getURL(); 

       // Show the new page in the editor pane. 
       JOptionPane.showMessageDialog(null, url); 
     } 
    } 
} 

Answer 1

使用傳統的鼠標監聽。 HyperlinkListener僅轉發鼠標移動和左鍵單擊。

這裏是一個小的演示代碼：

import java.awt.BorderLayout; 
import java.awt.Desktop; 
import java.awt.Dimension; 
import java.awt.event.MouseAdapter; 
import java.awt.event.MouseEvent; 
import java.io.IOException; 
import java.net.URI; 
import java.net.URISyntaxException; 

import javax.swing.JEditorPane; 
import javax.swing.JFrame; 
import javax.swing.JPanel; 
import javax.swing.JScrollPane; 
import javax.swing.JTextPane; 
import javax.swing.SwingUtilities; 
import javax.swing.UIManager; 
import javax.swing.UnsupportedLookAndFeelException; 
import javax.swing.event.HyperlinkEvent; 
import javax.swing.event.HyperlinkListener; 
import javax.swing.text.AttributeSet; 
import javax.swing.text.Element; 
import javax.swing.text.html.HTML; 
import javax.swing.text.html.HTMLDocument; 

public class TestHyperlinks { 

    private final class HyperlinkMouseListener extends MouseAdapter { 
     @Override 
     public void mouseClicked(MouseEvent e) { 
      if (e.getButton() == MouseEvent.BUTTON3) { 
       Element h = getHyperlinkElement(e); 
       if (h != null) { 
        Object attribute = h.getAttributes().getAttribute(HTML.Tag.A); 
        if (attribute instanceof AttributeSet) { 
         AttributeSet set = (AttributeSet) attribute; 
         String href = (String) set.getAttribute(HTML.Attribute.HREF); 
         if (href != null) { 
          try { 
           Desktop.getDesktop().browse(new URI(href)); 
          } catch (IOException e1) { 
           e1.printStackTrace(); 
          } catch (URISyntaxException e1) { 
           e1.printStackTrace(); 
          } 
         } 
        } 
       } 
      } 
     } 

     private Element getHyperlinkElement(MouseEvent event) { 
      JEditorPane editor = (JEditorPane) event.getSource(); 
      int pos = editor.getUI().viewToModel(editor, event.getPoint()); 
      if (pos >= 0 && editor.getDocument() instanceof HTMLDocument) { 
       HTMLDocument hdoc = (HTMLDocument) editor.getDocument(); 
       Element elem = hdoc.getCharacterElement(pos); 
       if (elem.getAttributes().getAttribute(HTML.Tag.A) != null) { 
        return elem; 
       } 
      } 
      return null; 
     } 
    } 

    protected void initUI() { 
     JPanel panel = new JPanel(false); 

     JEditorPane gentextp = new JTextPane(); 
     JScrollPane scrollPane = new JScrollPane(gentextp); 
     panel.add(scrollPane); 
     scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); 
     gentextp.setContentType("text/html"); 
     gentextp.setEditable(false); 
     gentextp.setPreferredSize(new Dimension(500, 400)); 
     gentextp.addMouseListener(new HyperlinkMouseListener()); 
     gentextp.setText("Some text containing an hyperlink: <a href=\"http://www.stackoverflow.com\">a link to stackoverflow</a> and some more text not in an hyperlink"); 

     JFrame f = new JFrame(TestHyperlinks.class.getSimpleName()); 
     f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     f.add(panel, BorderLayout.CENTER); 
     f.pack(); 
     f.setSize(f.getWidth() + 100, f.getHeight() + 100); 
     f.setVisible(true); 

    } 

    public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, 
      UnsupportedLookAndFeelException { 
     UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
     SwingUtilities.invokeLater(new Runnable() { 

      @Override 
      public void run() { 
       new TestHyperlinks().initUI(); 
      } 
     }); 
    } 

} 

Answer 2

添加通常的MouseListener並聽取右鍵單擊。點擊使用方法JEditorPane在文檔中獲得偏移量。然後檢查是否使用getCharacterElement()方法StyledDocument來獲取leaf Element。然後檢查葉子是否超鏈接。

或者您可以使用此http://java-sl.com/tip_links_in_editable.html實現自己的LinkController