ClassNotFoundException，即使包含该类的jar正确存在于类路径中

Question

I'm configuring a new project in eclipse. my project has many modules including one of them named eas.core. to the buildPath of my eas.core module, i have added a jar file common.jcr.jar containing a class named ContentRepositorySettings , that I'm using into my codes. but on runtime, I'm still getting a ClassNotFoundException as shown below

java.lang.NoClassDefFoundError: cm/bao/common/jcr/ContentRepositorySettings
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2944)
at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1208)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)
at cm.bao.eas.core.ElectronicArchivingApplicationImpl.setupGlobalSettings(ElectronicArchivingApplicationImpl.java:33)
at cm.bao.eas.core.ElectronicArchivingApplicationImpl.start(ElectronicArchivingApplicationImpl.java:49)
at cm.bao.eas.ui.gwt.server.listner.ElectronicArchivingContextListner.contextInitialized(ElectronicArchivingContextListner.java:18)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: cm.bao.common.jcr.ContentRepositorySettings
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1718)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1569)

Answer 1

If your project is Faceted , right click on the project and go to Properties , and choose Deployment Assembly on the left pane. Check if the dependencies exists there as Build Path entries or Archives (jars). Once this is done you may do Project > Clean and restart the server.