如何制作带有超链接

时间:2015-12-14 15:58:35

标签: java swing checkbox hyperlink jtextpane

问题:

我尝试在Java中创建一个复选框,其中包含超链接。

但是,我无法使链接可点击,只能链接,而不是整个文本。

enter image description here

这是我的示例代码:

public class TestClickLinkInCheckBox implements MouseListener {

    private JFrame frame1;
    private JFrame frame2;
    private String linkedText = "I have checked the data set I have selected, and agree to sign it following <a href=\"http://www.google.com\">the conditions of use of the service, defined in the policies of signature and certification</a> that I attest having read.";
    private JLabel label;

    public TestClickLinkInCheckBox() {
        justCheckBox();
        checkBoxWithLabel();
    }

    private void justCheckBox() throws HeadlessException {
        frame1 = new JFrame();
        JPanel panel = new JPanel();
        panel.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));
        JCheckBox checkBox = new JCheckBox(prettyText(linkedText, 300, "left"));
        panel.add(checkBox);
        frame1.add(panel);
    }

    private void checkBoxWithLabel() {
        frame2 = new JFrame();
        JPanel panel = new JPanel();
        panel.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));

        JCheckBox checkBox = new JCheckBox();
        panel.add(checkBox);

        label = new JLabel(prettyText(linkedText, 300, "left"));
        label.addMouseListener(this);
        panel.add(label);

        frame2.add(panel);
    }

    private void display() {
        frame1.setVisible(true);
        frame1.pack();
        frame2.setVisible(true);
        frame2.pack();
    }

    public static String prettyText(String badText, int length, String textAlign) {
        return "<html><body width='" + String.valueOf(length) + "px'><div style=\"text-align: " + textAlign + ";\">"+ badText.replace("|||", "<br>") + "</html>";
    }

    @Override
    public void mouseClicked(MouseEvent e) {
        if (e.getSource() == label) {
            JOptionPane.showConfirmDialog(frame2, "Clicked");
        }
    }

    @Override
    public void mousePressed(MouseEvent e) {}
    @Override
    public void mouseReleased(MouseEvent e) {}
    @Override
    public void mouseEntered(MouseEvent e) {}
    @Override
    public void mouseExited(MouseEvent e) {}

    public static void main(String[] args) {
        TestClickLinkInCheckBox test = new TestClickLinkInCheckBox();
        test.display();
    }
}

frame1显示一个简单的复选框,可以点击整个文本并选中/取消选中该复选框。 这就是我制作frame2的原因,由复选框和JLabel组成。 它运作良好,但它是可点击的所有文本。

有没有办法让链接可点击?

由于

路飞

[编辑]回复:

感谢@camickr给我一个回复。

这里的解决方案,最后不容易做到:

public class TestClickLinkInCheckBox implements HyperlinkListener {

    private JFrame frame;
    private String linkedText = "I have checked the data set I have selected, and agree to sign it following <b><u><a href=\"http://www.google.com\" style=\"color: #0000ff\">the conditions of use of the service, defined in the policies of signature and certification</a></u></b> that I attest having read.";
    private JTextPane textPane;

    public static void main(String[] args) {
        TestClickLinkInCheckBox test = new TestClickLinkInCheckBox();
        test.display();
    }

    public TestClickLinkInCheckBox() {
        checkboxWithJEditorPanel();
    }

    private void checkboxWithJEditorPanel() {
        frame = new JFrame();
        JPanel panel = new JPanel();
        panel.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));

        JCheckBox checkBox = new JCheckBox();
        panel.add(checkBox);

        textPane = new JTextPane();
        textPane.setContentType("text/html");
        textPane.setOpaque(false);
        textPane.setDocument(new HTMLDocument());
        textPane.setText(prettyText(linkedText, 300, "left"));
        textPane.setEditable(false);
        textPane.addHyperlinkListener(this);

         setFontSize(16);

        panel.add(textPane);

        frame.add(panel);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    private void setFontSize(int size) {
        MutableAttributeSet attrs = textPane.getInputAttributes();
         StyleConstants.setFontSize(attrs, size);
         StyledDocument document = textPane.getStyledDocument();
         document.setCharacterAttributes(0, document.getLength() + 1, attrs, false);
    }

    private void display() {
        frame.setVisible(true);
        frame.pack();
    }

    public static String prettyText(String badText, int length, String textAlign) {
        return "<html><body width='" + String.valueOf(length) + "px'><div style=\"text-align: " + textAlign + ";\">"+ badText.replace("|||", "<br>") + "</html>";
    }

    @Override
    public void hyperlinkUpdate(HyperlinkEvent e) {
        if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
            System.out.println(e.getURL());
        }
    }
}

要理解的一些解释:

  • 我使用JtextPane代替JEditorPane,因为文本没有包装在文本编辑器中,我可以使用我的html标记。
  • 我修改了提供的文字以添加粗体和下划线标记<b><u>,并且我还将颜色更改为超链接作为普通链接。在其他情况下,您将拥有该链接,但它将具有相同的文本颜色。
  • 请注意每次鼠标悬停在链接上时生成事件的HyperlinkListener,这就是为什么我使用HyperlinkEvent.EventType.ACTIVATED过滤了与“点击”相对应的事件
  • 将字体大小/样式/颜色加到整个文本上它真的很棘手,你需要使用我的技术,方法setFont在这里不起作用

享受:)

[EDIT2]要知道的事情:

  • 如果您使用Nimbus Look&Feel

    try {
        for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
            if ("Nimbus".equals(info.getName())) {
                UIManager.setLookAndFeel(info.getClassName());
                break;
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    

有一个错误,你将有一个白色背景。所以你需要通过添加这段代码而不是setBackground()方法来修复它:

    Color bgColor = panel.getBackground();
    UIDefaults defaults = new UIDefaults();
    defaults.put("TextPane[Enabled].backgroundPainter", bgColor);
    textPane.putClientProperty("Nimbus.Overrides", defaults);
    textPane.putClientProperty("Nimbus.Overrides.InheritDefaults", true);
    textPane.setBackground(bgColor);

JEditorPane相同,但改变了行

    defaults.put("EditorPane[Enabled].backgroundPainter", bgColor);

2 个答案:

答案 0 :(得分:5)

我知道如何在基本JDK中点击超链接的唯一方法是使用JEditorPane。

因此,您可以使用两个组件创建JCheckBox

  1. a JEditorPane(没有文字)
  2. 带有超链接的JEditorPane
  3. 您可以轻松地将Border自定义为透明且没有getFoo() .then(doA) .then(doB) .if(ifC, doC) .else(doElse) ,因此看起来这两个组件是单个组件。

答案 1 :(得分:0)

这不是一个非常动态或漂亮的解决方案,但你可以使用这样的多个标签:

private String beforeLinkText = "I have checked the data set I have selected, and agree to sign it following";
private String linkedText = " <a href=\"http://www.google.com\">the conditions of use of the service, defined in the policies of signature and certification</a> ";
private String afterLinkText = "that I attest having read.";

private void checkBoxWithLabel() {
        frame2 = new JFrame();
        JPanel panel = new JPanel();
        panel.setBorder(BorderFactory.createEmptyBorder(50, 50, 50, 50));

        JCheckBox checkBox = new JCheckBox();
        panel.add(checkBox);

        label = new JLabel(prettyText(linkedText, 400, "left"));
        label.addMouseListener(this);

        JPanel cbTextPanel = new JPanel (new FlowLayout(FlowLayout.LEFT));
        cbTextPanel.setPreferredSize(new Dimension(500,70));
        cbTextPanel.add(new JLabel(beforeLinkText));
        cbTextPanel.add(label);
        cbTextPanel.add(new JLabel(afterLinkText));
        panel.add(cbTextPanel);


        frame2.add(panel);
}