//$Id: Conductor.java 11282 2007-03-14 22:05:59Z epbernard $

 package org.hibernate.test.annotations.various;  

 import javax.persistence.Column;

 import javax.persistence.Entity;

 import javax.persistence.GeneratedValue;

 import javax.persistence.Id;

 import javax.persistence.Version;  

 import org.hibernate.annotations.Index;

 import org.hibernate.annotations.OptimisticLock;  

 @Entity

 public class Conductor {

     @Id

     @GeneratedValue

     private Integer id;

     @Column(name = "cond_name")

     @Index(name = "cond_name")

     <span style="color: rgb(255, 0, 0);">//@OptimisticLock(excluded = true)</span>  

     private String name;

     @Column(name = "cond_address")

     @Index(name = "cond_address")

     <span style="color: rgb(255, 0, 0);">@OptimisticLock(excluded = true)</span>  

     private String address;

     @Version

     private Long version;  

 }

  address是本人加上的.同时省略了get set方法.

 测试：

 Java代码

 //$Id: IndexTest.java 11282 2007-03-14 22:05:59Z epbernard $

 package org.hibernate.test.annotations.various;  

 ...........................  

 public class IndexTest extends TestCase {

     ...............  

     @SuppressWarnings("unchecked")

     public void testVersion() throws Exception {  

         Session session1=openSession();

         Session session2=openSession();

         Conductor stu1=(Conductor)session1.createQuery("from Conductor as a where a.name='Bob'").uniqueResult();

         Conductor stu2=(Conductor)session2.createQuery("from Conductor as a where a.name='Bob'").uniqueResult();  

         //这时候，两个版本号是相同的

         System.out.println("v1="+stu1.getVersion()+"--v2="+stu2.getVersion());  

         Transaction tx1=session1.beginTransaction();

         stu1.setName("session1");

         tx1.commit();

         //这时候，两个版本号是不同的，其中一个的版本号递增了

         System.out.println("v1="+stu1.getVersion()+"--v2="+stu2.getVersion());  

         Transaction tx2=session2.beginTransaction();

         stu2.setName("session2");  

         tx2.rollback();

         session2.close();

         session1.close();

     }

     ............

 }