How I can traverse the HTML tree using Jsoup?

Question

I think this question has been asked, but I not found anything.

From the Document element in Jsoup, how I can traverse for all elements in the HTML content?

I was reading the documentation and I was thinking about using the childNodes() method, but it only takes the nodes from one leval below (what I understand). I think I can use some recursion with this method, but I want to know if there is a more appropriate/native way to do this.

Answer 1

From Document (and any Node subclass), you can use the traverse(NodeVisitor) method.

For example:

document.traverse(new NodeVisitor() {
    public void head(Node node, int depth) {
        System.out.println("Entering tag: " + node.nodeName());
    }
    public void tail(Node node, int depth) {
        System.out.println("Exiting tag: " + node.nodeName());
    }
});

Answer 2

1) You can select all elements of the document using * selector.

Elements elements = document.body().select("*");

2) For retrieve text of each individually using Element.ownText() method.

for (Element element : elements) {
  System.out.println(element.ownText());
}

3) For modify the text of each individually using Element.html(String strHtml). (clears any existing inner HTML in an element, and replaces it with parsed HTML.)

element.html(strHtml);

Hope this will help you. Thank you!