Tomcat 7無法加載javax.persistence

Question

我正在將eclipse項目導入虛擬機。 我更改了庫（更改路徑並重新導入項目，因為此VM僅具有C :，而沒有D :）。 Tomcat不會加載並顯示此信息。 導入所有庫，並且將persistence.xml文件配置為正確。

[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

您會在應用程序的類路徑或tomcat的類路徑中錯過javax.persistence_1.0.0.jar 。

Answer 2

最后，我刪除並再次復制了.jars（Toplink），現在它可以正常工作了。 （老實說，我不知道現在如何工作...）