Exception in thread "main" java.lang.NoClassDefFoundError: javax/persistence/Cacheable 问题

我用annotations做hibernate操作时报这个错误请问是什么原因：
Exception in thread "main" java.lang.NoClassDefFoundError: javax/persistence/Cacheable
 at org.hibernate.cfg.AnnotationBinder.determineCacheSettings(AnnotationBinder.java:953)
 at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:596)
 at org.hibernate.cfg.AnnotationConfiguration.processArtifactsOfType(AnnotationConfiguration.java:636)
 at org.hibernate.cfg.AnnotationConfiguration.secondPassCompile(AnnotationConfiguration.java:359)
 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1377)
 at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:954)
 at TeacherTest.main(TeacherTest.java:17)
环境，hibernate3.5.5_annotations3.4.0
两个java类
TeacherTest
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;
import com.bjsxt.hibernate.model.Teacher;
public class TeacherTest {
 public static void main(String[] args){
  Teacher t=new Teacher();
  t.setId(1);
  t.setName("t1");
  t.setTitle("教受");
  Configuration cfg=new AnnotationConfiguration();
  SessionFactory sf=cfg.configure().buildSessionFactory();
  Session session=sf.openSession();
  session.beginTransaction();
  session.save(t);
  session.getTransaction().commit();
  session.close();
  sf.close();
 }
}
Teacher
package com.bjsxt.hibernate.model;
import javax.persistence.Entity;
import javax.persistence.Id;
@Entity
public class Teacher {
 private int id;
 private String name;
 private String title;
 @Id
 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 String getTitle() {
  return title;
 }

 public void setTitle(String title) {
  this.title = title;
 }
}
hibernate.cfg.xml中的mapping
<mapping class="com.bjsxt.hibernate.model.Teacher"/>

解决办法：

javax.persistence.Cacheable 是 JPA 2.0 规范中的东西！

需要加入hibernate-distribution-3.5.0-Final\lib\jpa目录下的hibernate-jpa-2.0-api-1.0.0.Final.jar
到path中
步骤：window->preferences-java->bulid path-userliberlay-hibernate-->add JARs->选择你的hibernate-jpa-2.0-api-1.0.0.Final.jar目录名，保存重新编译，问题解决