👀 Views: 52 💬 Answers: 1 📅 Created: 2025-06-13

jaxb xml marshalling Java

I've been struggling with this for a few days now and could really use some help. I'm having trouble with JAXB when trying to marshal an object to XML that utilizes namespaces. Specifically, I'm seeing unexpected null values for fields that should be populated. My object model looks something like this: ```java @XmlRootElement(name = "myElement", namespace = "http://www.example.com/ns") public class MyElement { @XmlElement(name = "childElement", namespace = "http://www.example.com/ns") private String childElement; // getters and setters } ``` When I attempt to marshal an instance of `MyElement`, like so: ```java MyElement element = new MyElement(); element.setChildElement("Test Value"); JAXBContext jaxbContext = JAXBContext.newInstance(MyElement.class); Marshaller marshaller = jaxbContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE); marshaller.marshal(element, System.out); ``` The output is: ```xml <myElement xmlns="http://www.example.com/ns"> <childElement xmlns="http://www.example.com/ns"></childElement> </myElement> ``` I am puzzled as to why the `childElement` is being printed as an empty tag instead of showing the "Test Value". I've confirmed that the `setChildElement` method is indeed being called correctly. Additionally, I've tried removing the namespace annotation, but that results in the same empty output. Am I missing something in the JAXB configuration or annotations? Any help would be greatly appreciated! I'm using Java 11 and JAXB 2.3.1. Thanks in advance for your insights! My development environment is Linux.