I have a little project which does throw an exception when i let it run.
The problem is here (TestObject.java):
final JAXBContext jaxbContext = JAXBContext.newInstance(...);
I really do not understand why this throws the exception. I also created a test which works like a charm (TestTest.java). Please forgive me the names, but this is just a small test application to get this working with java 11.
I followed this: javax.xml.bind.JAXBException Implementation of JAXB-API has not been found on module path or classpath
and addedcompile('javax.xml.bind:jaxb-api:2.3.0') compile('javax.activation:activation:1.1') compile('org.glassfish.jaxb:jaxb-runtime:2.3.0')
to my build.gradle but then it complains that
Error:java: module not found: java.activation
is missing. As this is also removed from Java 11 i added:
compile 'com.sun.activation:javax.activation:1.2.0'
but then it throws a lot of errors:
Error:java: the unnamed module reads package com.sun.xml.bind from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.util from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.marshaller from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.api from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.v2 from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.v2.util from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.v2.model.impl from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.v2.model.annotation from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.v2.runtime from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.v2.runtime.unmarshaller from both jaxb.runtime and jaxb.core Error:java: the unnamed module reads package com.sun.xml.bind.unmarshaller from both jaxb.runtime and jaxb.core Error:java: module jaxb.runtime reads package com.sun.xml.bind from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.util from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.marshaller from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.api from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.v2 from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.v2.util from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.v2.model.impl from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.v2.model.annotation from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.v2.runtime from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.v2.runtime.unmarshaller from both jaxb.core and jaxb.runtime Error:java: module jaxb.runtime reads package com.sun.xml.bind.unmarshaller from both jaxb.core and jaxb.runtime Error:java: module jaxb.core reads package com.sun.xml.bind from both jaxb.core and jaxb.runtime
What is so confusing to me: the test works. So it seems like there is some kind of jaxb-implementation in the junit5 environment.
I also found some other information in how to migrate a java 8 app to java 9 modules, where i found this:compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.4.0-b180830.0359' compile group: 'org.glassfish.jaxb', name: 'jaxb-runtime', version: '2.4.0-b180830.0438' compile group: 'org.glassfish.jaxb', name: 'jaxb-xjc', version: '2.4.0-b180830.0438'
But this is also not working. I would be very happy if someone can help me to get that running.
I use java-openjdk-11.0.1.13-11.rolling.fc29.x86_64 on Fedora 29, 64 bit.ps.: i wanted to write all that into the comment of the post with topic “javax.xml.bind.JAXBException…” but i was not allowed to do so. So i created this new post.
edit: the exception which is thrown in that sample application is this:
Exception in thread "main" java.lang.RuntimeException: javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath. - with linked exception: [java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory] at test/com.example.TestObject.doSomething(TestObject.java:21) at test/com.example.TestObject.main(TestObject.java:12) Caused by: javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath. - with linked exception: [java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory] at java.xml.bind/javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:269) at java.xml.bind/javax.xml.bind.ContextFinder.find(ContextFinder.java:412) at java.xml.bind/javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:721) at java.xml.bind/javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:662) at test/com.example.TestObject.doSomething(TestObject.java:17) ... 1 more Caused by: java.lang.ClassNotFoundException: com.sun.xml.bind.v2.ContextFactory at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) at java.xml.bind/javax.xml.bind.ServiceLoaderUtil.nullSafeLoadClass(ServiceLoaderUtil.java:122) at java.xml.bind/javax.xml.bind.ServiceLoaderUtil.safeLoadClass(ServiceLoaderUtil.java:155) at java.xml.bind/javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:267) ... 5 more
Answer
The solution is very easy. First, use jaxb 2.3.1. The beta-stuff is for testing only.
The real problem was the module-info.java. It is required to have 2 entries for jaxb:
requires java.xml.bind;
requires com.sun.xml.bind;
The first requires defines the implementation, the second the API.
The only two dependencies required are:
compile group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.1'
compile group: 'org.glassfish.jaxb', name: 'jaxb-runtime', version: '2.3.1'
Attribution
Source : Link , Question Author : J. Doe , Answer Author : J. Doe