javax.swing.text.html.HTMLDocument#getElement ( )源码实例Demo

private static void scrollToId(JEditorPane editor, String id) {
  Document d = editor.getDocument();
  if (d instanceof HTMLDocument) {
    HTMLDocument doc = (HTMLDocument) d;
    Element element = doc.getElement(id);
    try {
      int pos = element.getStartOffset();
      // Java 9: Rectangle r = editor.modelToView2D(pos).getBounds();
      Rectangle r = editor.modelToView(pos);
      if (r != null) {
        Rectangle vis = editor.getVisibleRect();
        r.height = vis.height;
        editor.scrollRectToVisible(r);
        editor.setCaretPosition(pos);
      }
    } catch (BadLocationException ex) {
      UIManager.getLookAndFeel().provideErrorFeedback(editor);
    }
  }
}
 

public static Element findElement(HTMLDocument doc
		, Attribute ab, String value){
	
	return doc.getElement(doc.getDefaultRootElement(), ab, value);
	
   /*ElementIterator it = new ElementIterator(doc);
   Element e;
   while ((e = it.next()) != null) 
     if (hasAttribute(e,ab,value))return e;
	return null;*/	
}
 

@Override public void actionPerformed(ActionEvent e) {
  textArea.append(String.format("----%n%s%n", getValue(Action.NAME)));
  String id = field.getText().trim();
  HTMLDocument doc = (HTMLDocument) editorPane.getDocument();
  Element element = doc.getElement(id);
  if (Objects.nonNull(element)) {
    textArea.append(String.format("found: %s%n", element));
    editorPane.requestFocusInWindow();
    editorPane.select(element.getStartOffset(), element.getEndOffset());
  }
}