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Comment convertir un objet org.w3c.dom.Document en String?

Je souhaite convertir un objet org.w3c.dom.Document en chaîne. J'utilise Java 6 et suis ouvert à toute technologie (totalement gratuite) à la hauteur de la tâche. J'ai essayé la solution à partir de ce fil de discussion - Existe-t-il une autre solution? manière élégante de convertir un document XML en chaîne dans Java que ce code? , où ils ont

DOMImplementationLS domImplementation = (DOMImplementationLS) doc.getImplementation();
LSSerializer lsSerializer = domImplementation.createLSSerializer();
String html = lsSerializer.writeToString(doc);

mais a été accueilli avec l'exception horrible suivante…

org.w3c.dom.DOMException: DOM method not supported
    at org.w3c.tidy.DOMDocumentImpl.getImplementation(DOMDocumentImpl.Java:129)
    at com.myco.myproj.cleaners.JTidyCleaner.outputDocAsString(JTidyCleaner.Java:74)
    at com.myco.myproj.cleaners.JTidyCleaner.parse(JTidyCleaner.Java:63)
    at com.myco.myproj.util.NetUtilities.getUrlAsDocument(NetUtilities.Java:51)
    at com.myco.myproj.parsers.AbstractHTMLParser.getEventFromElement(AbstractHTMLParser.Java:131)
    at com.myco.myproj.parsers.AbstractHTMLParser.parsePage(AbstractHTMLParser.Java:100)
    at com.myco.myproj.parsers.AbstractHTMLParser.getEvents(AbstractHTMLParser.Java:63)
    at com.myco.myproj.domain.EventFeed.refresh(EventFeed.Java:87)
    at com.myco.myproj.domain.EventFeed.getEvents(EventFeed.Java:72)
    at com.myco.myproj.parsers.impl.ChicagoCouncilGlobalAffairsParserTest.testParser(ChicagoCouncilGlobalAffairsParserTest.Java:21)
    at Sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at Sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.Java:39)
    at Sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.Java:25)
    at Java.lang.reflect.Method.invoke(Method.Java:597)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.Java:44)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.Java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.Java:41)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.Java:20)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.Java:28)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.Java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.Java:83)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.Java:72)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.Java:231)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.Java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.Java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.Java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.Java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.Java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.Java:184)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.Java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.Java:71)
    at org.junit.runners.ParentRunner.run(ParentRunner.Java:236)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.Java:174)
    at org.Eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.Java:50)
    at org.Eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.Java:38)
    at org.Eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.Java:467)
    at org.Eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.Java:683)
    at org.Eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.Java:390)
    at org.Eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.Java:197)
javaxmldocument
76
Dave

Si vous êtes d'accord pour effectuer la transformation, vous pouvez essayer ceci.

DocumentBuilderFactory domFact = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = domFact.newDocumentBuilder();
Document doc = builder.parse(st);
DOMSource domSource = new DOMSource(doc);
StringWriter writer = new StringWriter();
StreamResult result = new StreamResult(writer);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.transform(domSource, result);
System.out.println("XML IN String format is: \n" + writer.toString());
73
kosa

utiliser quelque chose comme

import Java.io.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;

//method to convert Document to String
public String getStringFromDocument(Document doc)
{
    try
    {
       DOMSource domSource = new DOMSource(doc);
       StringWriter writer = new StringWriter();
       StreamResult result = new StreamResult(writer);
       TransformerFactory tf = TransformerFactory.newInstance();
       Transformer transformer = tf.newTransformer();
       transformer.transform(domSource, result);
       return writer.toString();
    }
    catch(TransformerException ex)
    {
       ex.printStackTrace();
       return null;
    }
}
82
Zaz Gmy

Cela a fonctionné pour moi, comme documenté sur cette page :

TransformerFactory tf = TransformerFactory.newInstance();
Transformer trans = tf.newTransformer();
StringWriter sw = new StringWriter();
trans.transform(new DOMSource(document), new StreamResult(sw));
return sw.toString();
5
Sonam Shinare

Une version de Scala basée sur la réponse de Zaz).

  case class DocumentEx(document: Document) {
    def toXmlString(pretty: Boolean = false):Try[String] = {
      getStringFromDocument(document, pretty)
    }
  }

  implicit def documentToDocumentEx(document: Document):DocumentEx = {
    DocumentEx(document)
  }

  def getStringFromDocument(doc: Document, pretty:Boolean): Try[String] = {
    try
    {
      val domSource= new DOMSource(doc)
      val writer = new StringWriter()
      val result = new StreamResult(writer)
      val tf = TransformerFactory.newInstance()
      val transformer = tf.newTransformer()
      if (pretty)
        transformer.setOutputProperty(OutputKeys.INDENT, "yes")
      transformer.transform(domSource, result)
      Success(writer.toString);
    }
    catch {
      case ex: TransformerException =>
        Failure(ex)
    }
  }

Avec cela, vous pouvez faire soit doc.toXmlString() ou appeler la fonction getStringFromDocument(doc).

1
k.c. sham