java类javax.xml.transform.stream.StreamResult的实例源码

/**
 * Save a single emitter to the XML file
 * 
 * @param out
 *            The location to which we should save
 * @param emitter
 *            The emitter to store to the XML file
 * @throws IOException
 *             Indicates a failure to write or encode the XML
 */
public static void saveEmitter(OutputStream out, ConfigurableEmitter emitter)
        throws IOException {
    try {
        DocumentBuilder builder = DocumentBuilderFactory.newInstance()
                .newDocumentBuilder();
        Document document = builder.newDocument();

        document.appendChild(emitterToElement(document, emitter));
        Result result = new StreamResult(new OutputStreamWriter(out,
                "utf-8"));
        DOMSource source = new DOMSource(document);

        TransformerFactory factory = TransformerFactory.newInstance();
        Transformer xformer = factory.newTransformer();
        xformer.setOutputProperty(OutputKeys.INDENT, "yes");

        xformer.transform(source, result);
    } catch (Exception e) {
        Log.error(e);
        throw new IOException("Failed to save emitter");
    }
}

public void synchroGraphicalToXml(){
    Document doc=this.buildDocument();
    if(doc==null)return;
    TransformerFactory factory=TransformerFactory.newInstance();
    try{
        Transformer transformer=factory.newTransformer();
        transformer.setOutputProperty("encoding","utf-8");
        transformer.setOutputProperty(OutputKeys.INDENT,"yes");             
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        transformer.transform(new DOMSource(doc),new StreamResult(out));
        xmlEditor.getDocumentProvider().getDocument(xmlEditor.getEditorInput()).set(out.toString("utf-8"));
        out.close();
    }catch(Exception ex){
        ex.printStackTrace();
    }
}

/**
 * Test newTransformerHandler with a Template Handler along with a relative
 * URI in the style-sheet file.
 *
 * @throws Exception If any errors occur.
 */
@Test
public void testcase09() throws Exception {
    String outputFile = USER_DIR + "saxtf009.out";
    String goldFile = GOLDEN_DIR + "saxtf009GF.out";

    try (FileOutputStream fos = new FileOutputStream(outputFile)) {
        XMLReader reader = XMLReaderFactory.createXMLReader();
        SAXTransformerFactory saxTFactory
                = (SAXTransformerFactory)TransformerFactory.newInstance();

        TemplatesHandler thandler = saxTFactory.newTemplatesHandler();
        thandler.setSystemId("file:///" + XML_DIR);
        reader.setContentHandler(thandler);
        reader.parse(XSLT_INCL_FILE);
        TransformerHandler tfhandler=
            saxTFactory.newTransformerHandler(thandler.getTemplates());
        Result result = new StreamResult(fos);
        tfhandler.setResult(result);
        reader.setContentHandler(tfhandler);
        reader.parse(XML_FILE);
    }
    assertTrue(compareWithGold(goldFile, outputFile));
}

public static void saveXMLDoctoFile(Document doc, DocumentType documentType, String path)
        throws TransformerException {
    // Save DOM XML doc to File
    TransformerFactory transformerFactory = TransformerFactory.newInstance();
    Transformer transformer = transformerFactory.newTransformer();

    doc.setXmlVersion("1.0");
    transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
    transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC, documentType.getPublicId());
    transformer.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, documentType.getSystemId());

    transformer.transform(new DOMSource(doc), new StreamResult(new File(path)));
}

@Test
public void test() {
    try {
        String xmlFile = "numbering63.xml";
        String xslFile = "numbering63.xsl";

        TransformerFactory tFactory = TransformerFactory.newInstance();
        // tFactory.setAttribute("generate-translet", Boolean.TRUE);
        Transformer t = tFactory.newTransformer(new StreamSource(getClass().getResourceAsStream(xslFile), getClass().getResource(xslFile).toString()));
        StringWriter sw = new StringWriter();
        t.transform(new StreamSource(getClass().getResourceAsStream(xmlFile)), new StreamResult(sw));
        String s = sw.getBuffer().toString();
        Assert.assertFalse(s.contains("1: Level A"));
    } catch (Exception e) {
        Assert.fail(e.getMessage());
    }
}

@Override
public String [] getPayload (final PayloadType type, final String body) {
    final Source input = new StreamSource (new StringReader (body));
    final StringWriter writer = new StringWriter ();
    final StreamResult output = new StreamResult (writer);
    final TransformerFactory transformerFactory = TransformerFactory.newInstance ();
    transformerFactory.setAttribute ("indent-number", 4);
    try {
        final Transformer transformer = transformerFactory.newTransformer ();
        transformer.setOutputProperty (OutputKeys.INDENT, "yes");
        transformer.transform (input, output);
        return output.getWriter ()
            .toString ()
            .split ("\n");
    }
    catch (final TransformerException e) {
        fail (XmlFormatTransformerError.class, "Error while Xml Transformation.", e);
    }
    return new String [] {};
}

/**
 * Saves the xml, contained by the specified input with the custom indentation.
 * If the input is the result of jaxb marshalling, make sure to set
 * Marshaller.JAXB_FORMATTED_OUTPUT to false in order for this method to work
 * properly.
 * 
 * @param input
 * @param fos
 * @param indentation
 */
public static void saveWithCustomIndetation(ByteArrayInputStream input, FileOutputStream fos, int indentation) {
  try {
    Transformer transformer = SAXTransformerFactory.newInstance().newTransformer();
    transformer.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC, "yes");
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
    transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", String.valueOf(indentation));
    Source xmlSource = new SAXSource(new org.xml.sax.InputSource(input));
    StreamResult res = new StreamResult(fos);
    transformer.transform(xmlSource, res);
    fos.flush();
    fos.close();
  } catch (TransformerFactoryConfigurationError | TransformerException | IOException e) {
    log.log(Level.SEVERE, e.getMessage(), e);
  }
}

protected String domSourceToString() throws SQLException {
    try {
        DOMSource source = new DOMSource(this.asDOMResult.getNode());
        Transformer identity = TransformerFactory.newInstance().newTransformer();
        StringWriter stringOut = new StringWriter();
        Result result = new StreamResult(stringOut);
        identity.transform(source, result);

        return stringOut.toString();
    } catch (Throwable t) {
        SQLException sqlEx = SQLError.createSQLException(t.getMessage(), SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
        sqlEx.initCause(t);

        throw sqlEx;
    }
}

/**
 * Test the simple case of including a document using xi:include within a
 * xi:fallback using a DocumentBuilder.
 *
 * @throws Exception If any errors occur.
 */
@Test(groups = {"readWriteLocalFiles"})
public void testXIncludeFallbackDOMPos() throws Exception {
    String resultFile = USER_DIR + "doc_fallbackDOM.out";
    String goldFile = GOLDEN_DIR + "doc_fallbackGold.xml";
    String xmlFile = XML_DIR + "doc_fallback.xml";
    try (FileOutputStream fos = new FileOutputStream(resultFile)) {
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        dbf.setXIncludeAware(true);
        dbf.setNamespaceAware(true);

        Document doc = dbf.newDocumentBuilder().parse(new File(xmlFile));
        doc.setXmlStandalone(true);
        TransformerFactory.newInstance().newTransformer()
                .transform(new DOMSource(doc), new StreamResult(fos));
    }
    assertTrue(compareDocumentWithGold(goldFile, resultFile));
}

public static void write(Document doc, OutputStream out) throws IOException {
    // XXX note that this may fail to write out namespaces correctly if the document
    // is created with namespaces and no explicit prefixes; however no code in
    // this package is likely to be doing so
    try {
        Transformer t = TransformerFactory.newInstance().newTransformer(
                new StreamSource(new StringReader(IDENTITY_XSLT_WITH_INDENT)));
        DocumentType dt = doc.getDoctype();
        if (dt != null) {
            String pub = dt.getPublicId();
            if (pub != null) {
                t.setOutputProperty(OutputKeys.DOCTYPE_PUBLIC, pub);
            }
            t.setOutputProperty(OutputKeys.DOCTYPE_SYSTEM, dt.getSystemId());
        }
        t.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); // NOI18N
        Source source = new DOMSource(doc);
        Result result = new StreamResult(out);
        t.transform(source, result);
    } catch (Exception | TransformerFactoryConfigurationError e) {
        throw new IOException(e);
    }
}

private void generateWeather(String c) throws IOException, SAXException, TransformerException, ParserConfigurationException {
    city = c;

    // creating the URL
    String url = "http://api.openweathermap.org/data/2.5/weather?q=" + city + "&mode=xml&appid=" + APIKey;

    // printing out XML
    URL urlString = new URL(url);
    URLConnection conn = urlString.openConnection();

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(conn.getInputStream());

    TransformerFactory transformer = TransformerFactory.newInstance();
    Transformer xform = transformer.newTransformer();

    xform.transform(new DOMSource(doc), new StreamResult(System.out));
}

private static void writeDocument(Document document, File resultsFile) throws TransformerException, IOException
{
    File parentDir = resultsFile.getParentFile();
    if (!parentDir.exists() && !parentDir.mkdirs())
    {
        throw new IllegalStateException("Unable to create results directory:" + parentDir);
    }
    Transformer trans = TransformerFactory.newInstance().newTransformer();
    trans.setOutputProperty(OutputKeys.METHOD, "xml");
    trans.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
    trans.setOutputProperty(OutputKeys.INDENT, "yes");
    try (Writer writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(resultsFile), "UTF-8")))
    {
        trans.transform(new DOMSource(document), new StreamResult(writer));
    }
}

/**
 * SAXTFactory.newTransformerhandler() method which takes SAXSource as
 * argument can be set to XMLReader. SAXSource has input XML file as its
 * input source. XMLReader has a content handler which write out the result
 * to output file. Test verifies output file is same as golden file.
 *
 * @throws Exception If any errors occur.
 */
@Test
public void testcase02() throws Exception {
    String outputFile = USER_DIR + "saxtf002.out";
    String goldFile = GOLDEN_DIR + "saxtf002GF.out";

    try (FileOutputStream fos = new FileOutputStream(outputFile);
            FileInputStream fis = new FileInputStream(XSLT_FILE)) {
        XMLReader reader = XMLReaderFactory.createXMLReader();
        SAXTransformerFactory saxTFactory
                = (SAXTransformerFactory) TransformerFactory.newInstance();
        SAXSource ss = new SAXSource();
        ss.setInputSource(new InputSource(fis));

        TransformerHandler handler = saxTFactory.newTransformerHandler(ss);
        Result result = new StreamResult(fos);
        handler.setResult(result);
        reader.setContentHandler(handler);
        reader.parse(XML_FILE);
    }
    assertTrue(compareWithGold(goldFile, outputFile));
}

public static boolean saveFile(Document document, File file) {
    boolean flag = true;
    try {
        /** 将document中的内容写入文件中 */
        TransformerFactory tFactory = TransformerFactory.newInstance();
        Transformer transformer = tFactory.newTransformer();
        /** 编码 */
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        DOMSource source = new DOMSource(document);
        StreamResult result = new StreamResult(file);
        transformer.transform(source, result);
    } catch (Exception ex) {
        flag = false;
        ex.printStackTrace();
    }
    return flag;
}

@Test
public void test() {
    try {
        XMLOutputFactory xof = XMLOutputFactory.newInstance();
        StreamResult sr = new StreamResult();
        XMLStreamWriter xsw = xof.createXMLStreamWriter(sr);
        NamespaceContext nc = xsw.getNamespaceContext();
        System.out.println(nc.getPrefix(XMLConstants.XML_NS_URI));
        System.out.println("  expected result: " + XMLConstants.XML_NS_PREFIX);
        System.out.println(nc.getPrefix(XMLConstants.XMLNS_ATTRIBUTE_NS_URI));
        System.out.println("  expected result: " + XMLConstants.XMLNS_ATTRIBUTE);

        Assert.assertTrue(nc.getPrefix(XMLConstants.XML_NS_URI) == XMLConstants.XML_NS_PREFIX);
        Assert.assertTrue(nc.getPrefix(XMLConstants.XMLNS_ATTRIBUTE_NS_URI) == XMLConstants.XMLNS_ATTRIBUTE);

    } catch (Throwable ex) {
        Assert.fail(ex.toString());
    }
}

@Override
public String toString() {
    try {
        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");

        DOMSource source = new DOMSource(document);
        StreamResult result = new StreamResult(new StringWriter());
        transformer.transform(source, result);
        return result.getWriter().toString();
    } catch (TransformerException e) {
        throw new RuntimeException(e);
    }
}

/** 
 * Transforms the XML content to XHTML/HTML format string with the XSL. 
 * 
 * @param payload the XML payload to convert 
 * @param xsltFile the XML stylesheet file 
 * @return the transformed XHTML/HTML format string 
 * @throws XmlException problem converting XML to HTML 
 */  
public static String xmlToHtml(String payload, File xsltFile)  
        throws XmlException {  
    String result = null;  

    try {  
        Source template = new StreamSource(xsltFile);  
        Transformer transformer = TransformerFactory.newInstance()  
                .newTransformer(template);  

        Properties props = transformer.getOutputProperties();  
        props.setProperty(OutputKeys.OMIT_XML_DECLARATION, LOGIC_YES);  
        transformer.setOutputProperties(props);  

        StreamSource source = new StreamSource(new StringReader(payload));  
        StreamResult sr = new StreamResult(new StringWriter());  
        transformer.transform(source, sr);  

        result = sr.getWriter().toString();  
    } catch (TransformerException e) {  
        throw new XmlException(XmlException.XML_TRANSFORM_ERROR, e);  
    }  

    return result;  
}

@Test
public void test() {
    try {
        String xmlFile = "attribset27.xml";
        String xslFile = "attribset27.xsl";

        TransformerFactory tFactory = TransformerFactory.newInstance();
        // tFactory.setAttribute("generate-translet", Boolean.TRUE);
        Transformer t = tFactory.newTransformer(new StreamSource(getClass().getResourceAsStream(xslFile)));
        StringWriter sw = new StringWriter();
        t.transform(new StreamSource(getClass().getResourceAsStream(xmlFile)), new StreamResult(sw));
        String s = sw.getBuffer().toString();
        Assert.assertFalse(s.contains("color") || s.contains("font-size"));
    } catch (Exception e) {
        Assert.fail(e.getMessage());
    }
}

/**
 * xml 格式化
 *
 * @param xml
 * @return
 */
public static String xmlFormat(String xml) {
    if (TextUtils.isEmpty(xml)) {
        return "Empty/Null xml content";
    }
    String message;
    try {
        Source xmlInput = new StreamSource(new StringReader(xml));
        StreamResult xmlOutput = new StreamResult(new StringWriter());
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        transformer.transform(xmlInput, xmlOutput);
        message = xmlOutput.getWriter().toString().replaceFirst(">", ">\n");
    } catch (TransformerException e) {
        message = xml;
    }
    return message;
}

public static void printDocument(Node node, OutputStream out) {
  try {
    TransformerFactory tf = TransformerFactory.newInstance();
    Transformer transformer = tf.newTransformer();
    transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
    transformer.setOutputProperty(OutputKeys.METHOD, "xml");
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
    transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
    transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "4");

    transformer.transform(
        new DOMSource(node),
        new StreamResult(new OutputStreamWriter(out, "UTF-8")));
  } catch (Exception e) {
    throw new RuntimeException(e);
  }
}

/**
 * Outputs the given XML {@link Document} to the file {@code outFile}.
 *
 * TODO right now reformats the document. Needs to output as-is, respecting white-space.
 *
 * @param doc The document to output. Must not be null.
 * @param outFile The {@link File} where to write the document.
 * @param log A log in case of error.
 * @return True if the file was written, false in case of error.
 */
static boolean printXmlFile(
        @NonNull Document doc,
        @NonNull File outFile,
        @NonNull IMergerLog log) {
    // Quick thing based on comments from http://stackoverflow.com/questions/139076
    try {
        Transformer tf = TransformerFactory.newInstance().newTransformer();
        tf.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");         //$NON-NLS-1$
        tf.setOutputProperty(OutputKeys.ENCODING, "UTF-8");                   //$NON-NLS-1$
        tf.setOutputProperty(OutputKeys.INDENT, "yes");                       //$NON-NLS-1$
        tf.setOutputProperty("{http://xml.apache.org/xslt}indent-amount",     //$NON-NLS-1$
                             "4");                                            //$NON-NLS-1$
        tf.transform(new DOMSource(doc), new StreamResult(outFile));
        return true;
    } catch (TransformerException e) {
        log.error(Severity.ERROR,
                new FileAndLine(outFile.getName(), 0),
                "Failed to write XML file: %1$s",
                e.toString());
        return false;
    }
}

public static String toString(Node node, boolean pretty) {
    if (pretty) {
        trimWhiteSpace(node);
    }
    DOMSource domSource = new DOMSource(node);
    StringWriter writer = new StringWriter();
    StreamResult result = new StreamResult(writer);
    TransformerFactory tf = TransformerFactory.newInstance();
    try {
        Transformer transformer = tf.newTransformer();
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        if (pretty) {
            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
            transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        }
        transformer.transform(domSource, result);
        return writer.toString();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

public void appendResults(String testName, Map<String, ? extends FormattableTable> results, Metadata metadata, int verifyCount, Document dom, OutputStream outputStream) throws TransformerException, UnsupportedEncodingException
{
    if (dom == null)
    {
        dom = createNewDocument(metadata);
    }
    Node body = dom.getElementsByTagName("body").item(0);
    if (verifyCount == 1)
    {
        body.appendChild(ResultCell.createNodeWithText(dom, "h1", testName));
    }

    if (this.htmlOptions.isDisplayAssertionSummary())
    {
        appendAssertionSummary(testName, results, body);
    }
    for (Map.Entry<String, ? extends FormattableTable> namedTable : results.entrySet())
    {
        appendResults(testName, namedTable.getKey(), namedTable.getValue(), body, true);
    }
    TRANSFORMER.value().transform(new DOMSource(dom), new StreamResult(new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"))));
}

/**
    * Writes the modified web.xml back out to war file
    * 
    * @param doc
    *            The application.xml DOM Document
    * @throws org.apache.tools.ant.DeployException
    *             in case of any problems
    */
   protected void writeWebXml(final Document doc, final OutputStream outputStream) throws DeployException {
try {
    doc.normalize();

    // Prepare the DOM document for writing
    DOMSource source = new DOMSource(doc);

    // Prepare the output file
    StreamResult result = new StreamResult(outputStream);

    // Write the DOM document to the file
    // Get Transformer
    Transformer xformer = TransformerFactory.newInstance().newTransformer();
    // Write to a file
    xformer.transform(source, result);
} catch (TransformerException tex) {
    throw new DeployException("Error writing out modified web xml ", tex);
}
   }

protected String domSourceToString() throws SQLException {
    try {
        DOMSource source = new DOMSource(this.asDOMResult.getNode());
        Transformer identity = TransformerFactory.newInstance().newTransformer();
        StringWriter stringOut = new StringWriter();
        Result result = new StreamResult(stringOut);
        identity.transform(source, result);

        return stringOut.toString();
    } catch (Throwable t) {
        SQLException sqlEx = SQLError.createSQLException(t.getMessage(), SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor);
        sqlEx.initCause(t);

        throw sqlEx;
    }
}

/**
 * SAXTFactory.newTransformerhandler() method which takes SAXSource as
 * argument can be set to XMLReader. SAXSource has input XML file as its
 * input source. XMLReader has a transformer handler which write out the
 * result to output file. Test verifies output file is same as golden file.
 *
 * @throws Exception If any errors occur.
 */
@Test
public void testcase01() throws Exception {
    String outputFile = USER_DIR + "saxtf001.out";
    String goldFile = GOLDEN_DIR + "saxtf001GF.out";

    try (FileOutputStream fos = new FileOutputStream(outputFile)) {
        XMLReader reader = XMLReaderFactory.createXMLReader();
        SAXTransformerFactory saxTFactory
                = (SAXTransformerFactory) TransformerFactory.newInstance();
        TransformerHandler handler = saxTFactory.newTransformerHandler(new StreamSource(XSLT_FILE));
        Result result = new StreamResult(fos);
        handler.setResult(result);
        reader.setContentHandler(handler);
        reader.parse(XML_FILE);
    }
    assertTrue(compareWithGold(goldFile, outputFile));
}

/**
 * Oveloaded CustomComponent's render
 */
public final void render(final RenderContext ctx) {
  StreamSource xslSource = null;
  StreamSource xmlSource = null;
  try {
    xslSource = xslSource();
    xmlSource = xmlSource();
    final Transformer transformer = TransformerFactory.newInstance().newTransformer(xslSource);
    final PrintWriter pw = ctx.getWriter();
    transformer.transform(xmlSource, new StreamResult(pw));
  } catch (Exception e) {
    showUnexpectedErrorMsg(ctx, e);
  } finally {
    closeHard(xslSource);
    closeHard(xmlSource);
  }
}

private static void writeOut(Document doc) throws TransformerException {
    TransformerFactory transformerFactory = TransformerFactory
            .newInstance();
    Transformer transformer = transformerFactory.newTransformer();
    transformer.setOutputProperty(OutputKeys.INDENT, "yes");
    transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
    transformer.setOutputProperty(OutputKeys.STANDALONE, "no");
    DOMSource source = new DOMSource(doc);
    File f = new File("splFile.xml");
    f.delete();
    StreamResult result = new StreamResult(f);

    // Output to console for testing
    // StreamResult result = new StreamResult(System.out);

    transformer.transform(source, result);

    System.out.println("File saved!");

}

/**
 * Pretty print XML Node
 * @param node
 * @return
 * @throws XmlUtilitiesException
 */
public String xmlNodeToString( Node node ) throws XmlUtilitiesException {

    StringWriter sw = new StringWriter();
    try {
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        transformer.setOutputProperty(OutputPropertiesFactory.S_KEY_INDENT_AMOUNT, "4");
        transformer.setOutputProperty(OutputPropertiesFactory.S_KEY_LINE_SEPARATOR, "\n");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
        transformer.transform(new DOMSource(node), new StreamResult(sw));
    } catch (TransformerException te) {
        throw new XmlUtilitiesException("Error transforming XML node to String", te);
    }
    return sw.toString().trim();
}

/**
 * xml 格式化
 *
 * @param xml
 * @return
 */
public static String xmlFormat(String xml) {
    if (TextUtils.isEmpty(xml)) {
        return "Empty/Null xml content";
    }
    String message;
    try {
        Source xmlInput = new StreamSource(new StringReader(xml));
        StreamResult xmlOutput = new StreamResult(new StringWriter());
        Transformer transformer = TransformerFactory.newInstance().newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");
        transformer.transform(xmlInput, xmlOutput);
        message = xmlOutput.getWriter().toString().replaceFirst(">", ">\n");
    } catch (TransformerException e) {
        message = xml;
    }
    return message;
}