Преобразование org.w3c.dom.Document в Java в строку, используя трансформатор

Question

Я пытаюсь преобразовать XML org.w3c.dom.Document в строку с помощью трансформатора:

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 

    factory.setNamespaceAware(true); 
    DocumentBuilder builder = null; 
    try { 
     builder = factory.newDocumentBuilder(); 
    } catch (ParserConfigurationException e) { 

     e.printStackTrace(); 
    } 

    Document doc = builder.newDocument(); 

    Element gameNode = doc.createElement("Game"); 
    gameNode.setAttribute("gameID", String.valueOf(game.getGameID())); 
    gameNode.setAttribute("username", game.getUsername()); 
    gameNode.setAttribute("gameStartTime", String.valueOf(game.getGameStartTime())); 
    gameNode.setAttribute("gameStartDate", String.valueOf(game.getGameStartDate())); 
    gameNode.setAttribute("totalScore", String.valueOf(game.getTotalScore())); 
    gameNode.setAttribute("totalTimeInSeconds", String.valueOf(game.getTotalTimeInSeconds())); 
    gameNode.setAttribute("lastLevel", String.valueOf(game.getLastLevel())); 
    gameNode.setAttribute("firstLevel", String.valueOf(game.getFirstLevel())); 

    doc.appendChild(gameNode); 



    for(int i = 0 ; i < game.getScores().size(); i++) 
    { 
     Element scoreNode = doc.createElement("Score"); 
     scoreNode.setAttribute("gameID", String.valueOf(game.getScores().get(i).getGameID())); 
     scoreNode.setAttribute("points", String.valueOf(game.getScores().get(i).getPoints())); 
     scoreNode.setAttribute("levelOfScore", String.valueOf(game.getScores().get(i).getLevelOfScore())); 
     scoreNode.setAttribute("timeToScore", String.valueOf(game.getScores().get(i).getTimeToScore())); 

     gameNode.appendChild(scoreNode); 
    } 


    return DocumentToString(doc); 

Я используя мои объекты под названием «Игра и счет», которые не должны мешать процессу.

public static String DocumentToString(Document doc) 
{ 
    try { 
     TransformerFactory transformerFactory = TransformerFactory.newInstance(); 
     Transformer transformer = transformerFactory.newTransformer(); 
     DOMSource source = new DOMSource(doc); 
     StreamResult result = new StreamResult(System.out); 
     transformer.transform(source, result); 
     return "yeah"; 
    } catch (Exception ex) { 
     return "Error converting to String"; 
    } 

} 

По какой-то причине метод transformer.transform не завершен успешно.

Answer 1

Вот конвертер документов, который отлично работает для меня

public String getStringFromDoc(Document doc) throws TransformerException { 

     DOMSource domSource = new DOMSource(doc); 
     StringWriter writer = new StringWriter(); 
     StreamResult result = new StreamResult(writer); 
     TransformerFactory tf = TransformerFactory.newInstance(); 
     Transformer transformer = tf.newTransformer(); 
     transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); 
     transformer.setOutputProperty(OutputKeys.INDENT, "yes"); 
     transformer.transform(domSource, result); 
     writer.flush(); 
     return writer.toString(); 
    }