Create XML root element with the specified name - Java XML

Java examples for XML:DOM Element Create

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Description

Create XML root element with the specified name

Demo Code


//package com.java2s;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    /**/*  www . j  a  v  a  2  s. c om*/
     * Create an root element with the specified name
     *
     * @param doc
     * @param rootTagName
     * @return
     */
    public static Element createRootElement(Document doc, String rootTagName) {
        if (doc.getDocumentElement() == null) {
            Element root = doc.createElement(rootTagName);
            doc.appendChild(root);
            return root;
        }
        return doc.getDocumentElement();
    }

    /**
     * Create an element with the specified name
     *
     * @param parent
     * @param tagName
     * @return
     */
    public static Element createElement(Element parent, String tagName) {
        Document doc = parent.getOwnerDocument();
        Element child = doc.createElement(tagName);
        parent.appendChild(child);
        return child;
    }

    /**
     * create an child element with the specified name and value and append it in a parent element
     *
     * @param parent
     * @param tagName
     * @param value
     * @return
     */
    public static Element createElement(Element parent, String tagName,
            String value) {
        Document doc = parent.getOwnerDocument();
        Element child = doc.createElement(tagName);
        setElementValue(child, value);
        parent.appendChild(child);
        return child;
    }

    /**
     * Set the value of element
     *
     * @param element
     * @param val
     */
    public static void setElementValue(Element element, String val) {
        Node node = element.getOwnerDocument().createTextNode(val);
        NodeList nl = element.getChildNodes();
        for (int i = 0; i < nl.getLength(); i++) {
            Node nd = nl.item(i);
            if (nd.getNodeType() == Node.TEXT_NODE) {
                nd.setNodeValue(val);
                return;
            }
        }
        element.appendChild(node);
    }
}

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