Removing css information from HTML in java

Question

Is there any library or pre-written code to remove css attributes from HTML code.

The requirement is, the Java code has to parse through the input html document, and

Answer 1

You could use Cyberneko to parse the document and add a simple filter that looks something like this:

public class RemoveStyleFilter
    extends DefaultFilter
{
  @Override
  public void startElement(QName element, XMLAttributes attributes, Augmentations augs)
    throws XNIException
  {
    for (String forbidden : new String[] {"class", "style"})
    {
      int index = attributes.getIndex(forbidden);
      if (index >= 0)
      {
        attributes.removeAttributeAt(index);
      }
    }
    super.startElement(element, attributes, augs);
  }
}

Answer 2

Use jsoup and NodeTraversor to remove class and style attributes from all elements

Document doc = Jsoup.parse(input);


NodeTraversor traversor  = new NodeTraversor(new NodeVisitor() {

  @Override
  public void tail(Node node, int depth) {
    if (node instanceof Element) {
        Element e = (Element) node;
        e.removeAttr("class");
        e.removeAttr("style");
    }
  }

  @Override
  public void head(Node node, int depth) {        
  }
});

traversor.traverse(doc.body());
String modifiedHtml = doc.toString();