Question

我正在使用JOptionPane显示一些产品信息，需要添加一些网页链接。

我已经发现你可以使用包含html的JLabel，所以我添加了一个<a href>链接。该对话框中的链接显示为蓝色和带下划线，但不可点击。

例如，这也应该有效：

public static void main(String[] args) throws Throwable
{
    JOptionPane.showMessageDialog(null, "<html><a href=\"http://google.com/\">a link</a></html>");
}

如何在JOptionPane中获取可点击链接？

谢谢，保罗。

编辑 - 例如解决方案

public static void main(String[] args) throws Throwable
{
    // for copying style
    JLabel label = new JLabel();
    Font font = label.getFont();

    // create some css from the label's font
    StringBuffer style = new StringBuffer("font-family:" + font.getFamily() + ";");
    style.append("font-weight:" + (font.isBold() ? "bold" : "normal") + ";");
    style.append("font-size:" + font.getSize() + "pt;");

    // html content
    JEditorPane ep = new JEditorPane("text/html", "<html><body style=\"" + style + "\">" //
            + "some text, and <a href=\"http://google.com/\">a link</a>" //
            + "</body></html>");

    // handle link events
    ep.addHyperlinkListener(new HyperlinkListener()
    {
        @Override
        public void hyperlinkUpdate(HyperlinkEvent e)
        {
            if (e.getEventType().equals(HyperlinkEvent.EventType.ACTIVATED))
                ProcessHandler.launchUrl(e.getURL().toString()); // roll your own link launcher or use Desktop if J6+
        }
    });
    ep.setEditable(false);
    ep.setBackground(label.getBackground());

    // show
    JOptionPane.showMessageDialog(null, ep);
}

Answer 1

您可以将任何组件添加到JOptionPane。

所以添加一个JEditorPane，它显示你的HTML并支持HyperlinkListener。

Answer 2

在How to add hyperlink in JLabel

中，我们对此进行了相当详尽的讨论

Answer 3

The solution proposed below the answer does not work with Nimbus Look and Feel. Nimbus overrides the background color and makes the background white. The solution is to set the background color in the css. You also need to remove the component border. Here is a class that implements a solution that works with Nimbus (I Did not check other L&F):

import java.awt.Color;
import java.awt.Font;

import javax.swing.JEditorPane;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;

public class MessageWithLink extends JEditorPane {
    private static final long serialVersionUID = 1L;

    public MessageWithLink(String htmlBody) {
        super("text/html", "<html><body style=\"" + getStyle() + "\">" + htmlBody + "</body></html>");
        addHyperlinkListener(new HyperlinkListener() {
            @Override
            public void hyperlinkUpdate(HyperlinkEvent e) {
                if (e.getEventType().equals(HyperlinkEvent.EventType.ACTIVATED)) {
                    // Process the click event on the link (for example with java.awt.Desktop.getDesktop().browse())
                    System.out.println(e.getURL()+" was clicked");
                }
            }
        });
        setEditable(false);
        setBorder(null);
    }

    static StringBuffer getStyle() {
        // for copying style
        JLabel label = new JLabel();
        Font font = label.getFont();
        Color color = label.getBackground();

        // create some css from the label's font
        StringBuffer style = new StringBuffer("font-family:" + font.getFamily() + ";");
        style.append("font-weight:" + (font.isBold() ? "bold" : "normal") + ";");
        style.append("font-size:" + font.getSize() + "pt;");
        style.append("background-color: rgb("+color.getRed()+","+color.getGreen()+","+color.getBlue()+");");
        return style;
    }
}

Usage:

JOptionPane.showMessageDialog(null, new MessageWithLink("Here is a link on <a href=\"http://www.google.com\">http://www.google.com</a>"));

JOptionPane中的可点击链接

3 个答案: