Tomcat 7无法加载javax.persistence

Question

I am importing eclipse projects to a virtual machine. 我正在将eclipse项目导入虚拟机。 I changed libraries (change the paths and re-import the project because this VM only has C: and not D:). 我更改了库（更改路径并重新导入项目，因为此VM仅具有C :，而没有D :）。 Tomcat does not load and shows this. Tomcat不会加载并显示此信息。 All libraries are imported and the persistence.xml file is configured ok. 导入所有库，并且将persistence.xml文件配置为正确。

[2014-07-21 12:15:43] ERROR (InicializacionListener.java:142) - Excepcion cerrando DAO: java.lang.NullPointerException
java.lang.NullPointerException
    at com.dominion.procop.listeners.InicializacionListener.contextInitialized(InicializacionListener.java:140)
    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(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
jul 21, 2014 12:15:43 PM org.apache.catalina.core.StandardContext listenerStart
Grave: Excepción enviando evento inicializado de contexto a instancia de escuchador de clase com.dominion.procop.listeners.InicializacionListener
java.lang.NoClassDefFoundError: javax/persistence/PersistenceException
    at com.dominion.procop.listeners.InicializacionListener.contextInitialized(InicializacionListener.java:126)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.persistence.PersistenceException
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
    ... 10 more

jul 21, 2014 12:15:43 PM org.apache.catalina.core.StandardContext startInternal
Grave: Error listenerStart
jul 21, 2014 12:15:43 PM org.apache.catalina.core.StandardContext startInternal
Grave: Falló en arranque del Contexto [/MyData] debido a errores previos
[2014-07-21 12:15:43]  WARN (InicializacionListener.java:53) - >>>>>>  FINALIZANDO SERVICIO   <<<<<<
[2014-07-21 12:15:43]  INFO (Sincronizador.java:117) - Sincronizador - FINAL
jul 21, 2014 12:15:43 PM org.apache.coyote.AbstractProtocol startjava.lang.Thread.run(Unknown Source)

Answer 1

您会在应用程序的类路径或tomcat的类路径中错过javax.persistence_1.0.0.jar 。

Answer 2

Finally i deleted and copied again the .jars (Toplink) and now it works perfectly. 最后，我删除并再次复制了.jars（Toplink），现在它可以正常工作了。 (honestly, i dont know how now it works...) （老实说，我不知道现在如何工作...）

Tomcat 7无法加载javax.persistence

问题描述

2 个解决方案

解决方案1
1 2014-07-21 10:26:17

解决方案2
0 已采纳 2014-07-21 11:06:45

Tomcat 7无法加载javax.persistence

问题描述

2 个解决方案

解决方案1 1 2014-07-21 10:26:17

解决方案2 0 已采纳 2014-07-21 11:06:45

解决方案1
1 2014-07-21 10:26:17

解决方案2
0 已采纳 2014-07-21 11:06:45