Eclipse错误：java.lang.NoClassDefFoundError

嗨，我正在使用EclipseKepler更新一个旧项目。原始程序员有以下与表无关的ejb

ChangeNotification.java

import java.io.Serializable;
import java.util.Date;
public interface ChangeNotification extends Serializable{
    public String getId();
    public void setId(String id);
    public void setProduct(String product);
    public void setChangeType(String changeType);
}

编译完成后，我在部署目录下的EJBJAR中看到了.class

但是当我试图编译这个项目时，我得到了以下错误。我将包括所有内容，以防有进一步的提示：

21:01:28,478 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 18) MSC000001: Failed to start service jboss.persistenceunit."ADTF_EAR.ear#Grid-Persistence": org.jboss.msc.service.StartException in service jboss.persistenceunit."ADTF_EAR.ear#Grid-Persistence": java.lang.NoClassDefFoundError: ChangeNotification
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:172) [wildfly-jpa-8.1.0.Final.jar:8.1.0.Final]
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117) [wildfly-jpa-8.1.0.Final.jar:8.1.0.Final]
    at java.security.AccessController.doPrivileged(Native Method) [rt.jar:1.7.0_71]
    at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:474)
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:182) [wildfly-jpa-8.1.0.Final.jar:8.1.0.Final]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [rt.jar:1.7.0_71]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [rt.jar:1.7.0_71]
    at java.lang.Thread.run(Unknown Source) [rt.jar:1.7.0_71]
    at org.jboss.threads.JBossThread.run(JBossThread.java:122)
Caused by: java.lang.NoClassDefFoundError: ChangeNotification
    at java.lang.Class.getDeclaredMethods0(Native Method) [rt.jar:1.7.0_71]
    at java.lang.Class.privateGetDeclaredMethods(Unknown Source) [rt.jar:1.7.0_71]
    at java.lang.Class.getDeclaredMethods(Unknown Source) [rt.jar:1.7.0_71]
    at org.hibernate.annotations.common.reflection.java.JavaXClass.getDeclaredMethodProperties(JavaXClass.java:112)
    at org.hibernate.annotations.common.reflection.java.JavaXClass.getDeclaredProperties(JavaXClass.java:129)
    at org.hibernate.annotations.common.reflection.java.JavaXClass.getDeclaredProperties(JavaXClass.java:121)
    at org.hibernate.cfg.InheritanceState.determineDefaultAccessType(InheritanceState.java:263) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.cfg.InheritanceState.getElementsToProcess(InheritanceState.java:224) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:775) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3788) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3742) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1410) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1844) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:843) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:397) [hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:842) [hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.jboss.as.jpa.hibernate4.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44) [jipijapa-hibernate4-3-1.0.1.Final.jar:]
    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:154) [wildfly-jpa-8.1.0.Final.jar:8.1.0.Final]
    ... 8 more
Caused by: java.lang.ClassNotFoundException: ChangeNotification from [Module "deployment.ADTF_EAR.ear:main" from Service Module Loader]
    at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:213) [jboss-modules.jar:1.3.3.Final]
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:459) [jboss-modules.jar:1.3.3.Final]
    at org.jboss.modules.ConcurrentClassLoader.performLoadClassChecked(ConcurrentClassLoader.java:408) [jboss-modules.jar:1.3.3.Final]
    at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:389) [jboss-modules.jar:1.3.3.Final]
    at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:134) [jboss-modules.jar:1.3.3.Final]
    ... 27 more

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我只是不确定出了什么问题。该类就在那里，我停止了Eclipse-clean和Wildfly的刷新和重新部署，但得到了相同的错误。谢谢你的帮助

检查你的类路径，看看这里，谢谢链接非常有用