Java XML Child Element Text getChildElementText(final Element elParent, final String childTag)

Description

Returns the text within the child element with the specified tag.

License

Open Source License

Parameter

Parameter	Description
elParent	Parent element.
childTag	Child element tag.

Return

Child element text.

Declaration

public static String getChildElementText(final Element elParent,
        final String childTag) 

Method Source Code

//package com.java2s;

import org.w3c.dom.CDATASection;

import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;

public class Main {
    /**//from w  ww .  j av a  2  s .  co  m
     * Returns the text within the child element with the specified tag.
     * 
     * @param elParent
     *            Parent element.
     * @param childTag
     *            Child element tag.
     * @return Child element text.
     */
    public static String getChildElementText(final Element elParent,
            final String childTag) {
        final Element elChild = getFirstChildOfType(elParent, childTag);

        if (elChild == null) {
            return null;
        }

        return getElementText(elChild);
    }

    /**
     * Returns the first child element with the specified tag.
     * 
     * @param elParent
     *            Parent element.
     * @param childTag
     *            Child element tag.
     * @return First child element with the specified tag.
     */
    public static Element getFirstChildOfType(final Element elParent,
            final String childTag) {
        for (Node childNode = elParent.getFirstChild(); childNode != null; childNode = childNode
                .getNextSibling()) {
            if (childNode.getNodeType() == Node.ELEMENT_NODE) {
                final Element elChild = (Element) childNode;

                if (elChild.getTagName().equals(childTag)) {
                    return elChild;
                }
            }
        }

        return null;
    }

    /**
     * Returns the text within a specified element. Can be optimized for elements with a single text node (common case).
     * 
     * @param element
     *            Element whose text should be returned.
     * @return Element's text.
     */
    public static String getElementText(final Element element) {
        final StringBuffer elementText = new StringBuffer(256);

        for (Node childNode = element.getFirstChild(); childNode != null; childNode = childNode
                .getNextSibling()) {
            if (childNode.getNodeType() == Node.TEXT_NODE) {
                final Text textNode = (Text) childNode;

                elementText.append(textNode.getData());
            } else if (childNode.getNodeType() == Node.CDATA_SECTION_NODE) {
                final CDATASection cdataNode = (CDATASection) childNode;

                elementText.append(cdataNode.getData());
            }
        }

        return elementText.toString().trim();
    }
}

Related

1. getChildElementText(Element element, String name)
2. GetChildElementText(Element element, String name, String defaultValue)
3. getChildElementText(Element elm, String name, String defaultValue)
4. getChildElementText(Element elm, String name, String defaultValue)
5. getChildElementText(Element parentElement, String tagName)
6. getChildElementText(final Element parent, final String childName, final String defaultText)
7. getChildElementText(Node node, String childName)
8. getChildElementTextArr(Element parent, String name)
9. getChildElementTextValue(Node parent, String name)