Remove 'standalone=“yes”' from generated XML

StackOverflow https://stackoverflow.com/questions/277996

  •  07-07-2019
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Question

Do you know of a JAXB setting to prevent standalone="yes" from being generated in the resulting XML?

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
Was it helpful?

Solution 

marshaller.setProperty("com.sun.xml.bind.xmlDeclaration", Boolean.FALSE);

can be used to have no

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>

However i wouldnt consider this best practice.

OTHER TIPS

in JAXB that is part of JDK1.6

marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);

You can either use

marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);

or

marshaller.setProperty("com.sun.xml.bind.xmlDeclaration", Boolean.FALSE)

to disable the default XML declaration, and then add your custom XML declaration,

<?xml version="1.0" encoding="UTF-8"?>

by

marshaller.setProperty("com.sun.xml.bind.xmlHeaders",
      "<?xml version=\"1.0\" encoding=\"UTF-8\"?>");

to the generated xml, thus avoiding the standalone="yes" property.

just if someone else is still struggeling with this problem, you may consider using

marshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);

to remove all of the XML declaration and just write your own String at the beginning of your output stream / method

If you make document dependent on DOCTYPE (e.g. use named entities) then it will stop being standalone, thus standalone="yes" won't be allowed in XML declaration.

However standalone XML can be used anywhere, while non-standalone is problematic for XML parsers that don't load externals.

I don't see how this declaration could be a problem, other than for interoperability with software that doesn't support XML, but some horrible regex soup.

jaxbMarshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
jaxbMarshaller.setProperty("com.sun.xml.internal.bind.xmlHeaders", "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>");

This worked for me with JDK1.7. standalone=\"no\" can be removed to get only rest of the xml part

If you are using only the default javax.xml package, you could set the JAXB_FRAGMENT option of the marshaller to 'true' (this omits the default xml processing instruction) and use the writeProcessingInstruction method of the XMLStreamWriter to insert your own:

xmlStreamWriter.writeProcessingInstruction("xml", "version=\"1.0\" encoding=\"UTF-8\"");
jaxbMarshaller.setProperty( Marshaller.JAXB_FRAGMENT, Boolean.TRUE);
jaxbMarshaller.marshal(object, xmlStreamWriter);
xmlStreamWriter.writeEndDocument();

You can use: marshaller.setProperty("jaxb.fragment", Boolean.TRUE);

It works for me on Java 8

In case you are getting property exception, add the following configuration: 

jaxbMarshaller.setProperty("com.sun.xml.internal.bind.xmlHeaders",
              "<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
jaxbMarshaller.setProperty("com.sun.xml.internal.bind.xmlDeclaration", Boolean.FALSE);
jaxbMarshaller.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);

I don't have a high enough "reputation" to have the "privilege" to comment. ;-)

@Debasis, note that the property you've specified:

"com.sun.xml.internal.bind.xmlHeaders"

should be:

"com.sun.xml.bind.xmlHeaders" (without the "internal", which are not meant to be used by the public)

If I use the "internal" property as you did, I get a javax.xml.bind.PropertyException

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