数据库乐观锁的配置

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
 
<hibernate-mapping package="com.xiaohao.test">
 
    <class name="User"  table="user" optimistic-lock="version" >
              <id name="id">
            <generator class="native" />
        </id>
        <!--version标签必须跟在id标签后面-->
        <version column="version" name="version"  />
        <property name="userName"/>
        <property name="password"/>
                 
    </class>
     
 
</hibernate-mapping>