问个hibernate注解配置问题

hibernate 配置文件

entity

package com.entity;

import javax.persistence.*;

@Entity

public class Student {
private int id;
private String name;
private int age;

@Id @GeneratedValue(strategy=GenerationType.IDENTITY)

public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}

}

test类

SessionFactory c = new AnnotationConfiguration().configure().buildSessionFactory();
Session session=c.openSession();
Transaction ts = null;
ts=session.beginTransaction();
Student s = new Student();
s.setName("tom4");
s.setAge(2222);
session.save(s);
ts.commit();
session.close();

报错

Hibernate: insert into Student (age, name) values (?, ?)
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not insert: [com.entity.Student]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:67)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:40)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2158)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2638)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:48)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:298)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:181)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:107)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:187)
at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:33)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:172)
at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:27)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:535)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:523)
at org.hibernate.impl.SessionImpl.save(SessionImpl.java:519)
at com.test.HibernateTest1.main(HibernateTest1.java:38)
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: 对象名 'Student' 无效。
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(Unknown Source)
at com.microsoft.sqlserver.jdbc.IOBuffer.processPackets(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.sendExecute(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerStatement.doExecuteUpdate(Unknown Source)
at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeUpdate(Unknown Source)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:73)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:33)
... 16 more

想知道是为什么 如果改成xml形式的话 可以插入无错误 但是换注解就错了 谢谢知道的朋友说下 麻烦拉

Hibernate有2种使用的方法：

1、传统的session。就是你写的那样

2、JPA规范的方式使用。就是你的疑问。

你可以网上搜索 JPA 。

以下是网上的例子：

http://www.cnblogs.com/iloveu/archive/2009/05/12/1455077.html

[quote]想知道是为什么 如果改成xml形式的话 可以插入无错误 但是换注解就错了 谢谢知道的朋友说下 麻烦拉 [/quote]

[color=blue][b]使用注解的话，应该使用EntityManager来对实体进行操作。而你用的是Session，你换成EntityManager试试。

PS：要加入相应的jar包（hibernate-entitymanager）[/b][/color]