Inserting Element in a Document using Jsoup

Very similar, use prependElement() instead of appendElement() :

Document doc = Jsoup.parse(doc);
Elements els = doc.getElementsByTag("root");
for (Element el : els) {
    Element j = el.prependElement("child");
}

See if this helps you out:

    String html = "<root><child></child><child></chidl></root>";
    Document doc = Jsoup.parse(html);
    doc.selectFirst("root").child(0).before("<newChild></newChild>");
    System.out.println(doc.body().html());

Output:

<root>
 <newchild></newchild>
 <child></child>
 <child></child>
</root>

To decipher, it says:

1. Select the first root element
2. Grab the first child on that root element
3. Before that child insert this element

You can select any child by using any index in the child method

Example :

    String html = "<root><child></child><child></chidl></root>";
    Document doc = Jsoup.parse(html);
    doc.selectFirst("root").child(1).before("<newChild></newChild>");
    System.out.println(doc.body().html());

Output:

<root>
 <child></child>
 <newchild></newchild>
 <child></child>
</root>