org.hibernate.MappingException: component class not found:错误求大家帮忙

liush1023 2007-09-06 10:47:20

错误如下：
og4j:WARN No appenders could be found for logger (org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.hibernate.MappingException: component class not found: UserId
at org.hibernate.mapping.Component.getComponentClass(Component.java:105)
at org.hibernate.tuple.PojoComponentTuplizer.buildGetter(PojoComponentTuplizer.java:155)
at org.hibernate.tuple.AbstractComponentTuplizer.<init>(AbstractComponentTuplizer.java:40)
at org.hibernate.tuple.PojoComponentTuplizer.<init>(PojoComponentTuplizer.java:43)
at org.hibernate.tuple.TuplizerLookup.create(TuplizerLookup.java:126)
at org.hibernate.mapping.Component.getType(Component.java:160)
at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:253)
at org.hibernate.mapping.RootClass.validate(RootClass.java:193)
at org.hibernate.cfg.Configuration.validate(Configuration.java:984)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1169)
at com.hibernate.ChooseBreedDAOFactory.<init>(ChooseBreedDAOFactory.java:16)
at com.hibernate.TestChooseBreed.main(TestChooseBreed.java:5)
Caused by: java.lang.ClassNotFoundException: UserId
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:164)
at org.hibernate.util.ReflectHelper.classForName(ReflectHelper.java:108)
at org.hibernate.mapping.Component.getComponentClass(Component.java:102)
... 11 more
实在不知道是怎么回事，谢谢大家

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