信息:?Instantiated?an?instance?of?org.hibernate.validator.engine.resolver.JPATraversableResolver. Exception?in?thread?"main"?org.hibernate.MappingException:?Could?not?get?constructor?for?org.hibernate.persister.entity.SingleTableEntityPersister at?org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:185) at?org.hibernate.persister.internal.PersisterFactoryImpl.createEntityPersister(PersisterFactoryImpl.java:135) at?org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:386) at?org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1744) at?hibernate.com.empty.CoreSession.getSessionFactory(CoreSession.java:22) at?hibernate.com.empty.Test.add(Test.java:26) at?hibernate.com.empty.Test.main(Test.java:9) Caused?by:?org.hibernate.HibernateException:?Unable?to?instantiate?default?tuplizer?[org.hibernate.tuple.entity.PojoEntityTuplizer] at?org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:138) at?org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:188) at?org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:341) at?org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:505) at?org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:144) at?sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native?Method) at?sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at?sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at?java.lang.reflect.Constructor.newInstance(Constructor.java:526) at?org.hibernate.persister.internal.PersisterFactoryImpl.create(PersisterFactoryImpl.java:163) ...?6?more Caused?by:?java.lang.reflect.InvocationTargetException at?sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native?Method) at?sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at?sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at?java.lang.reflect.Constructor.newInstance(Constructor.java:526) at?org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:135) ...?15?more Caused?by:?org.hibernate.PropertyNotFoundException:?Could?not?find?a?getter?for?gid?in?class?hibernate.com.empty.Student at?org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:316) at?org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:310) at?org.hibernate.mapping.Property.getGetter(Property.java:320) at?org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:436) at?org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:200) at?org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:82) ...?20?more