在Java 9中如何在没有外部库的情况下创建XML文件？

Question

How to create XML file without external libraries in Java 9?

Currently I am using javax.xml.bind.JAXBContext and javax.xml.bind.Marshaller classes to do that, but on Java 9 these classes does not exist any more. So while using Java 9 I am getting an exception: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBContext .
I can create XML file with lower Java version, but I need it will be compatible and for Java 9.

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The way I am creating XML file right now is:

1. Create XML element class

List<Athlete> athletes = new ArrayList<>();
Places places = new Places();
places.setAthletes(athletes);    
JAXBContext context = JAXBContext.newInstance(Places.class);
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.marshal(places, new File(outputPath);
marshaller.marshal(places, System.out);

2. Create XML file

 List<Athlete> athletes = new ArrayList<>(); Places places = new Places(); places.setAthletes(athletes); JAXBContext context = JAXBContext.newInstance(Places.class); Marshaller marshaller = context.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.marshal(places, new File(outputPath); marshaller.marshal(places, System.out); 

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I hope someone encountered with this problem already and know how to solve it.

PS: I have searched for the answer of this question but doesn't found anything, so it shouldn't be a duplicated question.
As I mention I have to use only Java internal libraries for that.

Answer 1

You can use these libraries in Java 9, but you need to require the module that contains them. Ensure that your module-info.java has a requirement for the java.xml module:

module myModule {
    requires java.xml;
}

As you require more functionality from the JAXB modules, you will need to add more requires statements in your module-info.java file. For example, your module-info.java file may look more like the following when you are done:

module myModule {
   java.xml
   java.xml.bind
   java.xml.ws
   java.xml.ws.annotation
}

For more information, see How to resolve java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException in Java 9 .