Eclipse，Tomcat，JPA-java.lang.NoClassDefFoundError

Question

我有这个例外：

SEVERE: Exception sending context initialized event to listener instance of class utils.DBConfig
java.lang.NoClassDefFoundError: org/jboss/logging/Logger
    at org.hibernate.jpa.HibernatePersistenceProvider.<clinit>(HibernatePersistenceProvider.java:38)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at java.lang.Class.newInstance(Unknown Source)
    at javax.persistence.spi.PersistenceProviderResolverHolder$DefaultPersistenceProviderResolver.getPersistenceProviders(PersistenceProviderResolverHolder.java:99)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:75)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:54)
    at utils.DBConfig.contextInitialized(DBConfig.java:22)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5003)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5517)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1574)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1564)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.jboss.logging.Logger
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1858)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1709)
    ... 19 more

我添加了以下jar文件：

javax.persistence.jar
hibernate-entitymanager.jar

有人知道如何解决吗？

Answer 1

您会错过jboss-common.jar将其添加到您的类路径中。

Answer 2

如果您使用Maven：

如果您遇到“ java.lang.NoClassDefFoundError xxxxxx”错误，请在Google中搜索：“ maven xxxxxx”。 您找到http：//mvnrepository.com/artifact / ...

将依赖项复制/粘贴到pom.xml文件中。

<dependency>
    <groupId>org.jboss.logging</groupId>
    <artifactId>jboss-logging</artifactId>
    <version>3.3.0.Final</version>
</dependency>

Answer 3

从Maven存储库下载该Jar文件的较新版本，并将其放在您的lib目录中。 更好地使用Maven。