org.hibernate.MappingException: Could not get constructor for org.hibernate.persister.entity.Single

Caused by: 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:385) 

at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1769) 

at util.HibernateUtil.buildSessionFactory(HibernateUtil.java:19) 

at util.HibernateUtil.<clinit>(HibernateUtil.java:13) 

... 1 more 

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:507) 

at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:146) 

at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 

at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) 

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) 

at java.lang.reflect.Constructor.newInstance(Constructor.java:513) 

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:39) 

at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) 

at java.lang.reflect.Constructor.newInstance(Constructor.java:513) 

at org.h
4000
ibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:135) 

... 15 more 

Caused by: org.hibernate.PropertyNotFoundException: Could not find a getter for teamName in class set.Team

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:321) 

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 

这个异常不太好判断。 
Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister 
这个debug进去也不知道到底怎么回事。只知道是反射获取实体类对象时出了错。 

在网上查了一下， 大概有以下几种原因： 

1. 实体类的属性对象没有设置setter或者getter。  http://stackoverflow.com/questions/18042247/could-not-get-constructor-for-org-hibernate-persister-entity-singletableentitype 
2. 没有导入javassist的jar文件  (javassist-3.15.0-GA.jar什么的）  http://blog.csdn.net/xiaochangwei789/article/details/7712725 
3. 我这次出错的原因。 
我的实体类中的属性对象名和映射文件的property name不一致。 

private String team_name; 
<property name="team"
column="team_name" type="string"/> 

这里只要改成： 
private String team_name; 
<property name="team_name"... 
就好了。