java - 带有可点击链接的 JOptionPane

Question

我正在尝试为我的 JoptionPane 消息框添加一个可点击的链接。我从这个链接开始:clickable links in JOptionPane但它似乎不起作用，并且该链接不可点击。我怎样才能做到这一点？

Answer 1

@camickr 在您共享的链接中给出的解决方案有效......需要更多的挖掘

这就是我所做的

我必须将 JEditorPane 的 EditorKit 设置为能够处理“text/html”，然后将 JEditorPane 设置为不可编辑，然后我必须通过实现 HyperlinkListener 来处理超链接，它成功了!

这是我的代码:

public class HtmlInSwing {

    private static JFrame frame;
    private static JPanel panel;
    private static JOptionPane optionPane;
    private static JEditorPane editorPane;

    public static void main(String[] args) {
        frame = new JFrame("Demo frame...");
        panel = new JPanel();
        panel.setBackground(Color.CYAN);
        frame.setSize(800, 600);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setContentPane(panel);

        optionPane = new JOptionPane();
        optionPane.setSize(400, 300);
        editorPane = new JEditorPane();
        panel.add(optionPane, BorderLayout.CENTER);
        optionPane.add(editorPane, BorderLayout.CENTER);
        editorPane.setEditorKit(JEditorPane.createEditorKitForContentType("text/html"));
        editorPane.setEditable(false);

        HyperlinkListener hyperlinkListener = new     ActivatedHyperlinkListener(frame, editorPane);
        editorPane.addHyperlinkListener(hyperlinkListener);

        editorPane.setText("<a href='http://www.stackoverflow.com'>Go to the     stack</a>");

        editorPane.setToolTipText("if you click on <b>that link you go to     the stack");

        frame.setVisible(true);

    }
}

这是一张说明性图片:

现在这是 HyperlinkListener 的实现。

class ActivatedHyperlinkListener implements HyperlinkListener {

    Frame frame;

    JEditorPane editorPane;

    public ActivatedHyperlinkListener(Frame frame, JEditorPane editorPane) {
        this.frame = frame;
        this.editorPane = editorPane;
    }

    public void hyperlinkUpdate(HyperlinkEvent hyperlinkEvent) {
        HyperlinkEvent.EventType type = hyperlinkEvent.getEventType();
        final URL url = hyperlinkEvent.getURL();
        if (type == HyperlinkEvent.EventType.ENTERED) {
            System.out.println("URL: " + url);
        } else if (type == HyperlinkEvent.EventType.ACTIVATED) {
            System.out.println("Activated");
            Runnable runner = new Runnable() {
            public void run() {

            Document doc = editorPane.getDocument();
            try {
                editorPane.setPage(url);
            } catch (IOException ioException) {
                JOptionPane.showMessageDialog(frame,
                    "Error following link", "Invalid link",
                    JOptionPane.ERROR_MESSAGE);
                editorPane.setDocument(doc);
            }
        }
      };
      SwingUtilities.invokeLater(runner);
    }
  }
}

这是结果的快照(我将让您修复外观细节，因为我只是说明它的工作原理!)