org.hibernate.MappingException: invalid configuration

java.lang.ExceptionInInitializerError
at com.jiang.dao.impl.UserDAOImpl.save(UserDAOImpl.java:53)
at com.jiang.dao.impl.UserDAOImplTest.testSave(UserDAOImplTest.java:51)
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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Caused by: org.hibernate.MappingException: invalid configuration

at org.hibernate.cfg.AnnotationConfiguration.configure(AnnotationConfiguration.java:177)
at com.jiang.util.HibernateUtils.(HibernateUtils.java:32)
... 24 more
Caused by: org.xml.sax.SAXParseException: Document is invalid: no grammar found.
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2025)
... 32 more

hibernate的配置文件有问题

看不懂。。不过似乎意思是mapping这个元素未定义或者没有找到的意思