即使在类路径中正确包含了包含该类的jar，也会发生ClassNotFoundException [英] ClassNotFoundException even though the jar containing the class is properly present in the classpath

问题描述

我正在eclipse中配置一个新项目。我的项目有很多模块，其中一个名为eas.core。
到我的eas.core模块的buildPath中，我添加了一个jar文件common.jcr.jar，其中包含名为 ContentRepositorySettings 的类。我的密码。但是在运行时，我仍然得到 ClassNotFoundException 如下所示

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)

推荐答案

如果您的项目是 Faceted ，请右键单击该项目，然后转到属性，然后在左侧窗格中选择 Deployment Assembly 。检查依赖项是否存在于构建路径条目或 Archives （罐子）中。完成此操作后，您可以执行项目> 清洁并重新启动服务器。

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.

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