get Text Content from XML DOM Node - Java XML

Java examples for XML:DOM Node Value

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Description

get Text Content from XML DOM Node

Demo Code

/*/*from   w w  w. j av  a 2s.c o  m*/
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
//package com.java2s;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class Main {
    /**
     * based on public Java5 javadoc of org.w3c.dom.Node.getTextContent method
     */
    public static String getTextContent(Node node) {
        switch (node.getNodeType()) {
        case Node.ELEMENT_NODE:
        case Node.ATTRIBUTE_NODE:
        case Node.ENTITY_NODE:
        case Node.ENTITY_REFERENCE_NODE:
        case Node.DOCUMENT_FRAGMENT_NODE:
            return mergeTextContent(node.getChildNodes());
        case Node.TEXT_NODE:
        case Node.CDATA_SECTION_NODE:
        case Node.COMMENT_NODE:
        case Node.PROCESSING_INSTRUCTION_NODE:
            return node.getNodeValue();
        case Node.DOCUMENT_NODE:
        case Node.DOCUMENT_TYPE_NODE:
        case Node.NOTATION_NODE:
        default:
            return null;
        }
    }

    /**
     * based on the following quote from public Java5 javadoc of org.w3c.dom.Node.getTextContent method:
     * 
     * "concatenation of the textContent attribute value of every child node, excluding COMMENT_NODE and
     * PROCESSING_INSTRUCTION_NODE nodes. This is the empty string if the node has no children"
     */
    private static String mergeTextContent(NodeList nodes) {
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < nodes.getLength(); i++) {
            Node n = nodes.item(i);
            final String text;

            switch (n.getNodeType()) {
            case Node.COMMENT_NODE:
            case Node.PROCESSING_INSTRUCTION_NODE:
                text = null;
                break;
            default:
                text = getTextContent(n);
                break;
            }

            if (text != null) {
                buf.append(text);
            }
        }
        return buf.toString();
    }
}

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