java - javase项目中的Eclipselink问题

Question

当我运行 eclipselink 项目时，出现此错误。

[EL Warning]: 2008.12.05 11:47:08.056--java.lang.NoClassDefFoundError: org/jboss/resource/adapter/jdbc/ValidConnectionChecker was thrown on attempt of PersistenceLoadProcessor to load class com.mysql.jdbc.integration.jboss.MysqlValidConnectionChecker. The class is ignored.Exception in thread "main" java.lang.NoClassDefFoundError: org/jboss/resource/adapter/jdbc/ValidConnectionChecker        at java.lang.ClassLoader.defineClass1(Native Method)        at java.lang.ClassLoader.defineClass(Unknown Source)        at java.security.SecureClassLoader.defineClass(Unknown Source)        at java.net.URLClassLoader.defineClass(Unknown Source)        at java.net.URLClassLoader.access$000(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)        at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.loadClass(PersistenceUnitProcessor.java:261)        at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.initPersistenceUnitClasses(MetadataProcessor.java:247)        at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processEntityMappings(MetadataProcessor.java:422)        at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:299)        at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:830)        at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.callPredeploy(JPAInitializer.java:101)        at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.initPersistenceUnits(JPAInitializer.java:149)        at org.eclipse.persistence.internal.jpa.deployment.JPAInitializer.initialize(JPAInitializer.java:135)        at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:104)        at org.eclipse.persistence.jpa.PersistenceProvider.createEntityManagerFactory(PersistenceProvider.java:64)        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)        at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:60)        at Main.main(Main.java:32)Caused by: java.lang.ClassNotFoundException: org.jboss.resource.adapter.jdbc.ValidConnectionChecker        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)        at java.lang.ClassLoader.loadClassInternal(Unknown Source)        ... 24 more

有什么想法吗？为什么 eclipselink 需要 jboss 的东西？我需要什么jboss jar。我会使用 open jpa，但由于某种原因，在退出我的应用程序中的一些持久性内容后，它开始给出一堆 stackoverflow 错误。

Answer 1

如果您的项目根本不应该使用 JBoss，但仍然需要一些 JBoss 类，这可能意味着:

• 您的默认服务器是 JBoss(在服务器 View 中)
• 或您的persistence.xml 在您的 yourProjectEJB/ejbModule/META-INF 中确实引用了 JBoss