一个奇怪的异常，SSH使用注解方式

Exception in thread "main" org.springframework.orm.hibernate3.HibernateSystemException: Unknown entity: cn.pb.jbit.tcjc034.entity.Director; nested exception is org.hibernate.MappingException: Unknown entity: cn.pb.jbit.tcjc034.entity.Director
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:679)
at org.springframework.orm.hibernate3.HibernateAccessor.convertHibernateAccessException(HibernateAccessor.java:412)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:411)
at org.springframework.orm.hibernate3.HibernateTemplate.executeWithNativeSession(HibernateTemplate.java:374)
at org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:512)
at org.springframework.orm.hibernate3.HibernateTemplate.get(HibernateTemplate.java:506)
at cn.pb.jbit.tcjc034.dir.dao.impl.DirDaoImpl.queryDirectorById(DirDaoImpl.java:36)
at cn.pb.jbit.tcjc034.test.Test.main(Test.java:15)
Caused by: org.hibernate.MappingException: Unknown entity: cn.pb.jbit.tcjc034.entity.Director
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:628)
at org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:91)
at org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:906)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:843)
at org.hibernate.impl.SessionImpl.get(SessionImpl.java:836)
at org.springframework.orm.hibernate3.HibernateTemplate$1.doInHibernate(HibernateTemplate.java:519)
at org.springframework.orm.hibernate3.HibernateTemplate.doExecute(HibernateTemplate.java:406)
... 5 more

package cn.pb.jbit.tcjc034.test;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import cn.pb.jbit.tcjc034.dir.dao.DirDao;

public class Test {
public static void main(String[] args) {
BeanFactory factory = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
DirDao dao=(DirDao)factory.getBean("ddao");
System.out.println(dao.queryDirectorById(2));
}

}

package cn.pb.jbit.tcjc034.entity;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;
import javax.persistence.Table;

@Entity
@Table(name="Director")
@SequenceGenerator(name="dir",sequenceName="seq_dir_dirid")
public class Director implements java.io.Serializable {

// Fields

private int dirid;
private String dirname;

// Property accessors
@Id
@GeneratedValue(generator="dir")
public int getDirid() {
return this.dirid;
}

public void setDirid(int dirid) {
this.dirid = dirid;
}

public String getDirname() {
return this.dirname;
}

public void setDirname(String dirname) {
this.dirname = dirname;
}

}

package cn.pb.jbit.tcjc034.dir.dao;

import java.util.List;

import cn.pb.jbit.tcjc034.entity.Director;

public interface DirDao {
public void addDirector(Director director);

public void deleteDirector(int id);

public void updateDirector();

public Director queryDirectorById(int id);

public List<Director> queryAllDirector();

}

package cn.pb.jbit.tcjc034.dir.dao.impl;

import java.util.List;

import javax.annotation.Resource;

import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;
import org.springframework.stereotype.Repository;

import cn.pb.jbit.tcjc034.dir.dao.DirDao;
import cn.pb.jbit.tcjc034.entity.Director;
@Repository("ddao")
public class DirDaoImpl extends HibernateDaoSupport implements DirDao {
@Resource
public void setSessionFacotry(SessionFactory sessionFacotry) {
super.setSessionFactory(sessionFacotry);
}
public void addDirector(Director director) {
// TODO Auto-generated method stub

}

public void deleteDirector(int id) {
// TODO Auto-generated method stub

}

public List<Director> queryAllDirector() {
// TODO Auto-generated method stub
return null;
}

public Director queryDirectorById(int id) {
// TODO Auto-generated method stub
return (Director) this.getHibernateTemplate().get(Director.class, id);
}

public void updateDirector() {
// TODO Auto-generated method stub

}

}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <context:annotation-config />
<context:component-scan base-package="cn.pb.jbit.tcjc034"></context:component-scan>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver">
</property>
<property name="url" value="jdbc:oracle:thin:@172.25.24.214:1521:orcl">
</property>
<property name="username" value="tuzki"></property>
<property name="password" value="orcl"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
org.hibernate.dialect.Oracle9Dialect
</prop>
</props>
</property>
<property name="annotatedClasses">
<list>
<value>
cn.pb.jbit.tcjc034.entity.Director
</value>
</list>
</property>
</bean>
</beans>

<property name="annotatedClasses">
<list>
<value>
cn.pb.jbit.tcjc034.entity.Director
</value>
</list>
/property>