Unable to resolve NoClassDefFoundError for Jena IRIFactory

问题

Below is the stacktrace of the error log I'm getting. If someone can tell what exactly could be causing this because as per the stacktrace I've everything in place.

Exception in thread "main" java.lang.NoClassDefFoundError: com/hp/hpl/jena/iri/IRIFactory
    at net.rootdev.javardfa.uri.IRIResolver.<init>(IRIResolver.java:26)
    at org.odftoolkit.odfdom.pkg.rdfa.SAXRDFaParser.createInstance(SAXRDFaParser.java:57)
    at org.odftoolkit.odfdom.pkg.OdfFileDom.initialize(OdfFileDom.java:217)
    at org.odftoolkit.odfdom.pkg.manifest.OdfManifestDom.initialize(OdfManifestDom.java:74)
    at org.odftoolkit.odfdom.pkg.OdfFileDom.<init>(OdfFileDom.java:132)
    at org.odftoolkit.odfdom.pkg.manifest.OdfManifestDom.<init>(OdfManifestDom.java:63)
    at org.odftoolkit.odfdom.pkg.OdfFileDom.newFileDom(OdfFileDom.java:189)
    at org.odftoolkit.odfdom.pkg.OdfPackage.parseManifest(OdfPackage.java:1219)
    at org.odftoolkit.odfdom.pkg.OdfPackage.readZip(OdfPackage.java:452)
    at org.odftoolkit.odfdom.pkg.OdfPackage.initializeZip(OdfPackage.java:422)
    at org.odftoolkit.odfdom.pkg.OdfPackage.<init>(OdfPackage.java:250)
    at org.odftoolkit.odfdom.pkg.OdfPackage.loadPackage(OdfPackage.java:320)
    at org.odftoolkit.simple.Document.loadDocument(Document.java:328)
    at org.odftoolkit.simple.TextDocument.loadDocument(TextDocument.java:305)
    at com.poc.LetsGetStarted.main(LetsGetStarted.java:13)
Caused by: java.lang.ClassNotFoundException: com.hp.hpl.jena.iri.IRIFactory
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.net.URLClassLoader$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)
    ... 15 more

Jar Versions : jena-iri : 1.0.2 , java-rdfa : 0.4

Thanks.

回答1:

I got the reason, I've tried both java-rdfa version 0.4 and 0.5 snapshot but both of them refer to com.hp.hpl.jena.iri.IRIFactory, however in the current packaging IRIFactory is moved to package org.apache.jena.iri.IRIFactory.

回答2:

com/hp/hpl/jena/iri/IRIFactory class is not in any of the JARs specified in the class path.

To find the whether the class IRIFactory is in any of the jar files in the CLASS_PATH 1) In windows extract each jar file and check for the class name 2) In linux use "jar -tvf [jar-file-name] |grep "IRIFactory"

If none of the jar contains the class file, add the correct jar in the class path.

来源：https://stackoverflow.com/questions/24906073/unable-to-resolve-noclassdeffounderror-for-jena-irifactory