HTML JLabel 中的文本忽略与 text-align: center 的对齐

Question

我需要将文本格式化为 HTML。因此，文本包含在 HTML 标签中，并应用了正确的颜色和对齐方式。颜色设置有效，但 'text-align: center;' 设置的对齐无效。希望在 'botlabel'.

中居中对齐 HTML 文本

清理和重建项目没有帮助。关于什么可能会覆盖此对齐设置的任何想法？任何帮助深表感谢。谢谢。

这是代码

public class TestMessageDialogV2 extends JFrame {


    public static void main(String[] args) {

        final String html = "<html><h3 style='color: #ff0000; padding: 3px;'>The folder does not exist at this path.</h3>"
                                + "<ol style='padding: 3px;'><li><span style='color: #000000;'>a folder path</span></li>"
                                + "</ol><h3 style='color: #ff0000;padding: 3px;'>Invalid files selected:</h3>"
                                + "<ol style='padding: 3px;'><li>"
                                + "<span style='color: #000000;'>The file does not exist at this path.<br />some file</span></li>"
                                + "</ol><br clear=all />"
                                + "</html>";

        UIManager.put("OptionPane.background", Color.WHITE.brighter());
        UIManager.put("Panel.background", Color.WHITE.brighter());

        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {

                try {


                    JPanel panel = new JPanel();
                    panel.setLayout( new BorderLayout() );
                    panel.setBackground( Color.WHITE.brighter() );

                    final JEditorPane editorPane = new JEditorPane("text/html", html);

                    editorPane.setEditable(false);
                    //editorPane.setPreferredSize();

                    editorPane.addHierarchyListener(new HierarchyListener() {
                                public void hierarchyChanged(HierarchyEvent e) {
                                    Window window = SwingUtilities.getWindowAncestor(editorPane);
                                    if (window instanceof Dialog) {
                                        Dialog dialog = (Dialog)window;
                                        if (!dialog.isResizable()) {
                                            dialog.setResizable(true);
                                        }
                                    }
                                }
                            });

                    JScrollPane scrollPane = new JScrollPane (
                                            editorPane
                                            , JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED
                                            , JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);                  

                    scrollPane.setPreferredSize(new Dimension(400,120));

                    JLabel botlabel = new JLabel();

                    botlabel.setText(   
                                    "<html>"
                                +   "<br clear=all />"
                                +   "<h3 style='color: #0033CC; text-align: center; '>" 
                                //+     com.fox.dv.utils.iofile.DoHtml.SPACES 
                                +   "Press Ok to continue or Cancel to exit.</h3>"
                                +   "</html>"

                            );

                    botlabel.setBorder(BorderFactory.createLineBorder( Color.black, 1 ) );

                    botlabel.setHorizontalTextPosition(JLabel.CENTER);
                    botlabel.setVerticalAlignment(SwingConstants.CENTER);

                    panel.add(scrollPane, BorderLayout.CENTER);
                    panel.add(botlabel, BorderLayout.SOUTH);


                    JOptionPane.showMessageDialog(
                        null
                        , panel
                        , "Title"
                        , JOptionPane.ERROR_MESSAGE
                    );

                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    private static final long serialVersionUID = -2116426209967837157L;
}

Answer 1

因为 Swing Components 对 HTML 的支持是 limited，请为 botlabel 指定 JLabel.CENTER。

JLabel botlabel = new JLabel("", JLabel.CENTER);
botlabel.setText(
    "<html>"
    + "<br clear=all />"
    + "<h3 style='color: #0033CC'>"
    + "Press Ok to continue or Cancel to exit.</h3>"
    + "</html>"
);

HTML JLabel 中的文本忽略与 text-align: center 的对齐

HTML text in JLabel ignores alignment with text-align: center

html

java

swing

jlabel

alignment