使用Hibernate时出现java.lang.ArrayIndexOutOfBoundsException: 0

[爱在一瞬间]

我在学习hibernate框架，但是经常会遇到这样一个问题。一开始我遇到，我修改一下配置文件也就好了，但是这次不知道是哪里的问题了所以贴出来让大家帮忙看一下。程序并不复杂，就是hibernate的对于域对象的继承关系的一种处理策略，一个子类一张表。望前辈指点一二。

package zhangdk.Model;
//父类
public class People {
	private String ID;
	private String name;
	
	public String getID() {
		return ID;
	}
	public void setID(String iD) {
		ID = iD;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
}
package zhangdk.Model;
//继承People
public class Teacher extends People {
	private int salary;
	private String title;
	
	
	public int getSalary() {
		return salary;
	}
	public void setSalary(int salary) {
		this.salary = salary;
	}
	public String getTitle() {
		return title;
	}
	public void setTitle(String title) {
		this.title = title;
	}
	
	
}
package zhangdk.Model;

//继承People
public class Student extends People{
	private String dept;
	private int age;
	
	
	public String getDept() {
		return dept;
	}
	public void setDept(String dept) {
		this.dept = dept;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
}
//主程序
package zhangdkTest;

import java.util.List;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import zhangdk.Model.Student;

public class OneTableOneOb {
	private static SessionFactory sessionFactory;
	
	static{
		sessionFactory=new Configuration().configure().buildSessionFactory();
	}
	
	public static void main(String[] args) {
		Session session=sessionFactory.openSession();
		Transaction tx=null;
		
		try {
			tx=session.beginTransaction();
			
			List list=session.createQuery("from Student")
					.list();
			
			for(Object o:list){
				Student student=(Student)o;
				
				System.out.println(student.getID()+"\t"+student.getName());
			}
			
			tx.commit();
		} catch (Exception e) {
			e.printStackTrace();
			if(tx!=null){
				tx.rollback();
			}
		}finally{
			if(session!=null){
				session.close();
			}
		}
		
	}

}

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="zhangdk.Model.Student" table="Student">
        <id name="ID" type="java.lang.String" column="ID">
            <generator class="uuid"></generator>
        </id>
        
        <property name="name" type="java.lang.String" column="name"/>
        <property name="dept" type="java.lang.String" column="dept"/>
        <property name="age" type="java.lang.Integer" column="age"/>
        
    </class>
</hibernate-mapping>
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- 
    Mapping file autogenerated by MyEclipse Persistence Tools
-->
<hibernate-mapping>
    <class name="zhangdk.Model.Teacher" table="Teacher">
        <id name="ID" type="java.lang.String" column="ID">
            <generator class="uuid"></generator>
        </id>
        <property name="name" type="java.lang.String" column="name"/>
        <property name="salary" type="java.lang.Integer" column="salary"/>
        <property name="title" type="java.lang.String" column="title"/>
        
    </class>
</hibernate-mapping>

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

<session-factory>
	<property name="dialect">
		org.hibernate.dialect.SQLServerDialect
	</property>
	<property name="connection.url">
		jdbc:sqlserver://localhost:1433;databaseName=Hibernate
	</property>
	<property name="connection.username">sa</property>
	<property name="connection.password">weixx1990</property>
	<property name="connection.driver_class">
		com.microsoft.sqlserver.jdbc.SQLServerDriver
	</property>
	<property name="myeclipse.connection.profile">
		com.microsoft.sqlserver.jdbc.SQLServerDriver
	</property>

	<property name="show_sql">true</property>

	<property name="format_sql">true</property>
	<mapping resource="Student.hbm.xml" />
	<mapping resource="Teacher.hbm.xml" />
</session-factory>

</hibernate-configuration>

异常提示：
java.lang.ArrayIndexOutOfBoundsException: 0
at com.mchange.v2.codegen.bean.SimplePropertyBeanGenerator.main(SimplePropertyBeanGenerator.java:564)

[爱在一瞬间]

我发现了，是开发环境的问题，今天又进去使用就没有问题了。