Java tutorial
//package com.java2s; /* ************************************************************************** * * See the NOTICE file distributed with this work for additional information * regarding copyright ownership. * * This file is licensed 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. * ************************************************************************** */ import java.io.IOException; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.io.StringWriter; import java.io.Writer; import org.w3c.dom.Attr; import org.w3c.dom.DOMConfiguration; import org.w3c.dom.Document; import org.w3c.dom.Element; import org.w3c.dom.Node; import org.w3c.dom.Text; import org.w3c.dom.bootstrap.DOMImplementationRegistry; import org.w3c.dom.ls.DOMImplementationLS; import org.w3c.dom.ls.LSOutput; import org.w3c.dom.ls.LSSerializer; public class Main { public static String getText(Node node) throws IOException { StringWriter writer = new StringWriter(); if (!serializeXmlNode(node, writer, false)) { return null; } return writer.toString(); } private static boolean serializeXmlNode(Node node, Writer writer, boolean includeNode) throws IOException { if (node == null) { return false; } short type = node.getNodeType(); boolean result = true; switch (type) { case Node.ATTRIBUTE_NODE: { String text = ((Attr) node).getValue(); writer.write(text); break; } case Node.TEXT_NODE: { String text = ((Text) node).getData(); writer.write(text); break; } case Node.ELEMENT_NODE: { Element element = (Element) node; if (includeNode) { serializeXML(element, writer, false); } else { Node child = element.getFirstChild(); while (child != null) { serializeXmlNode(child, writer, true); child = child.getNextSibling(); } } break; } case Node.DOCUMENT_NODE: { Document doc = (Document) node; serializeXmlNode(doc.getDocumentElement(), writer, includeNode); break; } default: result = false; break; } return result; } /** * @param doc * @param out * @throws IOException */ public static void serializeXML(Document doc, OutputStream out) throws IOException { serializeXML(doc.getDocumentElement(), out); } public static void serializeXML(Document doc, Writer writer) throws IOException { serializeXML(doc.getDocumentElement(), writer, true); } public static void serializeXML(Document doc, Writer writer, boolean addXmlDeclaration) throws IOException { serializeXML(doc.getDocumentElement(), writer, addXmlDeclaration); } public static void serializeXML(Element doc, OutputStream out) throws IOException { Writer writer = new OutputStreamWriter(out, "UTF-8"); serializeXML(doc, writer, true); } private static void serializeXML(Element doc, Writer writer, boolean addXmlDeclaration) throws IOException { try { DOMImplementationRegistry registry = DOMImplementationRegistry.newInstance(); DOMImplementationLS impl = (DOMImplementationLS) registry.getDOMImplementation("LS"); LSSerializer serializer = impl.createLSSerializer(); DOMConfiguration config = serializer.getDomConfig(); config.setParameter("xml-declaration", addXmlDeclaration); // config.setParameter("format-pretty-print", true); // config.setParameter("normalize-characters", true); LSOutput out = impl.createLSOutput(); out.setCharacterStream(writer); serializer.write(doc, out); } catch (Throwable e) { throw new IOException(e.getMessage()); } } public static String serializeXML(Node node) throws IOException { StringWriter writer = new StringWriter(); if (!serializeXmlNode(node, writer, true)) { return null; } return writer.toString(); } }