Here you can find the source of formatXMLStr(String xml)
public static String formatXMLStr(String xml)
//package com.java2s; /*//w w w. j av a 2 s . c om * Licensed 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.ByteArrayInputStream; import java.io.IOException; import java.io.StringWriter; import javax.xml.parsers.DocumentBuilderFactory; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.*; import javax.xml.transform.dom.DOMSource; import javax.xml.transform.stream.StreamResult; import org.w3c.dom.Node; import org.xml.sax.SAXException; public class Main { public static String formatXMLStr(String xml) { String output = null; try { Node document = DocumentBuilderFactory.newInstance().newDocumentBuilder() .parse(new ByteArrayInputStream(xml.getBytes())).getDocumentElement(); TransformerFactory tFactory = TransformerFactory.newInstance(); Transformer transformer = tFactory.newTransformer(); transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes"); transformer.setOutputProperty(OutputKeys.INDENT, "yes"); transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2"); StringWriter writer = new StringWriter(); transformer.transform(new DOMSource(document), new StreamResult(writer)); // output = writer.getBuffer().toString().replaceAll("\n|\r", ""); output = writer.getBuffer().toString(); } catch (TransformerConfigurationException e) { e.printStackTrace(); } catch (TransformerException e) { e.printStackTrace(); } catch (SAXException e) { e.printStackTrace(); } catch (ParserConfigurationException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } return output; } }