CodexBloom - Programming Q&A Platform

implementing XML Namespace Conflicts in JAXB when Unmarshalling

👀 Views: 2 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-03
JAXB XML Java

I tried several approaches but none seem to work. I've searched everywhere and can't find a clear answer. I'm working through a tutorial and I'm working with a frustrating scenario while trying to unmarshal an XML file using JAXB in my Java application... The XML I'm working with includes multiple namespaces, and I'm not sure how to properly handle them without running into conflicts. Here's a simplified version of the XML: ```xml <root xmlns:ns1="http://example.com/ns1" xmlns:ns2="http://example.com/ns2"> <ns1:element>Value 1</ns1:element> <ns2:element>Value 2</ns2:element> </root> ``` I have a corresponding JAXB-annotated class like this: ```java @XmlRootElement(name = "root") @XmlAccessorType(XmlAccessType.FIELD) public class Root { @XmlElement(namespace = "http://example.com/ns1") private String element1; @XmlElement(namespace = "http://example.com/ns2") private String element2; // Getters and Setters } ``` When I try to unmarshal the XML using the following code, I get an `org.xml.bind.UnmarshalException` with the message "unexpected element (uri:"http://example.com/ns2", local:"element")". Here's the unmarshalling code I used: ```java JAXBContext jaxbContext = JAXBContext.newInstance(Root.class); Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); Root root = (Root) unmarshaller.unmarshal(new File("path/to/xml/file.xml")); ``` I've checked that the namespaces in the XML match those in my JAXB annotations, and everything seems correct structurally. I've also tried updating to the latest JAXB version (2.3.1) and using the `setProperty` method to ignore namespace prefixes, but that hasn't worked either. Am I missing something crucial, or is there a specific trick to effectively parse XML with multiple namespaces in JAXB? Any insights would be greatly appreciated! I'm developing on Ubuntu 20.04 with Java. Is there a simpler solution I'm overlooking? This is my first time working with Java 3.11. I'd really appreciate any guidance on this. For context: I'm using Java on Linux. Cheers for any assistance!