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I want to convert the stream result output to string since I want to use it in Junit I think that I need to use the string writer but Im not sure how exactly to use it.

StreamResult result = new StreamResult(new File("C:\\file.xml"));
transformer.transform(source, result);

Thanks Fedor

3 Answers3

39

Have a look at and learn to use the javadocs of the StreamResult class (http://java.sun.com/javase/6/docs/api/). One of the constructors of StreamResult takes a Writer object as a parameter. You will see that one of the sub-classes of Writer is StringWriter. So to obtain a string from what is written to the StreamResult, you can construct a StringWriter, put it into the StreamResult, transform() the Source to the StreamResult and get the string from the StringWriter. 

//create a StringWriter for the output
StringWriter outWriter = new StringWriter();
StreamResult result = new StreamResult( outWriter );
...
transformer.transform( source, result );  
StringBuffer sb = outWriter.getBuffer(); 
String finalstring = sb.toString();
lanoxx
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Timo Hahn
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  • Hello Timo,Thanks but where should I put the converter StreamResult result = new StreamResult(new File("C:\\file.xml")); –  Nov 04 '12 at 11:05
  • Well, you either put the result into a file using StreamResult result = new StreamResult(new File("C:\\file.xml")); or you put it into a StringWriter using StreamResult result = new StreamResult( outWriter ); Why using a file if you want it in a string? – Timo Hahn Nov 04 '12 at 11:11
  • what is 'source' representing? – Patrick W. McMahon Feb 15 '15 at 00:07
  • I'd guess that `source` is the XML that is getting transformed. – james.garriss Jul 10 '15 at 17:13
32
StringWriter writer = new StringWriter();
transformer.transform(source, new StreamResult(writer));
String output = writer.toString();
nosid
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3

You can use a StringWriter in this way :

StringWriter sw = (StringWriter) result.getWriter(); 
StringBuffer sb = sw.getBuffer(); 
String finalstring = sb.toString();
aleroot
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