The generated class names are all numbers

Question

enter image description here

How to customize and add a class name prefix?thank you!

WordprocessingMLPackage wordMLPackage = WordprocessingMLPackage.load(wordIs);

OutputStream os = new ByteArrayOutputStream();
HTMLSettings htmlSettings = Docx4J.createHTMLSettings();
htmlSettings.setUserBodyTail("");
htmlSettings.setUserBodyTop("");
htmlSettings.setOpcPackage(wordMLPackage);
Docx4J.toHTML(htmlSettings, os, 3);
if (wordMLPackage.getMainDocumentPart().getFontTablePart() != null) {
       wordMLPackage.getMainDocumentPart().getFontTablePart().deleteEmbeddedFontTempFiles();
}
String content = os.toString();