无法从可运行jar配置EntityManagerFactory [英] Unable to configure EntityManagerFactory from runnable jar

问题描述

我正在开发一个使用Hibernate3的JPA-2.0应用程序。它在eclipse中运行良好，但是如果从生成的可运行jar中运行它，它会提供一个javax.persistence.PersistenceException：无法配置EntityManagerFactory：

 线程main中的异常java.lang.reflect.InvocationTargetException $ b $ sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）
 sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java： 
 at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）
 at java.lang.reflect.Method.invoke（Method.java:597）
 at org.eclipse .jdt.internal.jarinjarloader.JarRsrcLoader.main（JarRsrcLoader.java:56）
导致：javax.persistence.PersistenceException：无法在org.hibernate.ejb.Ejb3Configuration.configure中配置EntityManagerFactory 
（Ejb3Configuration .java：374）
 at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory（HibernatePersistence.java:56）
 at javax.persistence.P ersistence.createEntityManagerFactory（Persistence.java:48）
 at javax.persistence.Persistence.createEntityManagerFactory（Persistence.java:32）
引起：java.lang.StringIndexOutOfBoundsException：字符串索引超出范围：-1 
 at java.lang.String.substring（String.java:1937）
 at org.hibernate.ejb.packaging.JarVisitorFactory.getJarURLFromURLEntry（JarVisitorFactory.java:55）
 at org.hibernate .ejb.Ejb3Configuration.configure（Ejb3Configuration.java:340）
 ... 12 more 
  

如果我解压缩同一个jar文件，然后直接运行这个类，它可以工作：

  java -cp。：< add列表到所有.jar文件> MainClass 
  

我无法弄清楚有什么不对。

I'm developing a JPA-2.0 application using Hibernate3. It runs fine from eclipse, but if run it from a generated runnable jar, it gives a javax.persistence.PersistenceException: Unable to configure EntityManagerFactory:

Exception in thread "main" java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:56)
Caused by: javax.persistence.PersistenceException: Unable to configure EntityManagerFactory
    at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:374)
    at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -1
    at java.lang.String.substring(String.java:1937)
    at org.hibernate.ejb.packaging.JarVisitorFactory.getJarURLFromURLEntry(JarVisitorFactory.java:55)
    at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:340)
    ... 12 more

If I unpack this same jar, and run the class directly, it works though:

java -cp .:<add list to all .jar files> MainClass

I cannot figure out what's wrong.

解决方案

It'll work if you choose the "Extract required libraries into generated JAR" while generating the runnable JAR.

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