运行jar压缩应用程序时出现Hibernate InvalidMappingException

我刚刚开始玩Java和Hibernate,并让一个应用程序开始工作。当我从eclipse运行它时,一切都“完美地”工作,但是当我使用eclipse内置函数将具有依赖项的项目打包到jar文件时,我得到:

org.hibernate.InvalidMappingException: Unable to read XML
        at org.hibernate.util.xml.MappingReader.readMappingDocument(MappingReader.java:101)
        at org.hibernate.cfg.Configuration.add(Configuration.java:510)
        at org.hibernate.cfg.Configuration.add(Configuration.java:506)
        at org.hibernate.cfg.Configuration.add(Configuration.java:686)
        at org.hibernate.cfg.Configuration.addResource(Configuration.java:771)
        at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2314)
        at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2280)
        at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2260)
        at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2213)
        at org.hibernate.cfg.Configuration.configure(Configuration.java:2128)
        at org.hibernate.cfg.Configuration.configure(Configuration.java:2107)
        at myPackage.MyClass.setUp(MyClass.java:89)

hibernate.cfg.xml和mapping.hbm.xml都直接位于src文件夹中。它们之间的“联系”是:

<mapping resource="mapping.hbm.xml" />

在生成的jar文件中,它们都以根结尾。