java.math.BigInteger cannot be cast to com.labmanager.fw.data.bo.Lab

package com.labmanager.fw.JUNIT;



import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;



import org.hibernate.SQLQuery;

import org.hibernate.Session;

import org.hibernate.Transaction;



import com.labmanager.fw.data.bo.Lab;

import com.labmanager.fw.util.HibernateSessionFactory;



public class PageDeviceTest{



	public List getResultCount(String table){

		Session session=HibernateSessionFactory.getSession();

		Transaction ts=session.beginTransaction();

		List list=new ArrayList();

		String sql="select count(*) from "+table+" where id > 0";

		try{

			ts.begin();

			SQLQuery sqlQuery=session.createSQLQuery(sql); 

			list=sqlQuery.list();

			ts.commit();

			System.out.println("查询到数据"+list.get(0).toString()+"条");

		}catch(Exception e){

			ts.rollback();

			e.printStackTrace();

		}finally{

			HibernateSessionFactory.closeSession();

		}

		return list;

	}

	public void dispaly(){

		List list=new ArrayList();

		list=this.getResultCount("tblab");

		Iterator it=list.iterator();

		while(it.hasNext()){

			System.out.println(((Lab)it.next()).getName());

		}

	}

	public static void main(String[] args){

		new PageDeviceTest().dispaly();	

	}



}

&

Console输出：

查询到数据20条
Exception in thread "main" java.lang.ClassCastException: java.math.BigInteger cannot be cast to com.labmanager.fw.data.bo.Lab
at com.labmanager.fw.JUNIT.PageDeviceTest.dispaly(PageDeviceTest.java:40)
at com.labmanager.fw.JUNIT.PageDeviceTest.main(PageDeviceTest.java:44)


&
Lab类是Hibernate inverse 生成的。
主键类型为Short
配置文件如下
<hibernate-mapping>
    <class name="com.labmanager.fw.data.bo.Lab" table="tblab" catalog="labmanager">
        <id name="id" type="java.lang.Short">
            <column name="id" />
            <generator class="identity"></generator>
        </id>
        <many-to-one name="currriculum" class="com.labmanager.fw.data.bo.Currriculum" fetch="select">
            <column name="curriculumId" />
        </many-to-one>
        <property name="name" type="java.lang.String">
            <column name="name" />
        </property>
        <property name="profile" type="java.lang.String">
            <column name="profile" />
        </property>
    &n