相关疑难解决方法(0)

我知道这个问题已经在这里提出了好几次.但是我找不到任何有用的解决方案,所以我决定再次发布.

我正在使用Hibernate和Spring MVC框架,我正在尝试获取我的类和子类:

public class Scene implements Serializable{
private Long id;
private Author author;
//omitting getters and setters
} 

public class Author{
private Long id;
Private String  name; 
//omitting getters and setters
}

我的Hibernate配置如下:

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
  <property name="driverClassName" value="org.postgresql.Driver" />
  <property name="url" value="jdbc:postgresql://127.0.0.1/doolloop2" />
  <property name="username" value="doolloop2" />
  <property name="password" value="doolloop" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="dataSource" ref="dataSource" />
     <property name="mappingLocations">
      <list>
        <value>WEB-INF/mapping/Scene.hbm.xml</value>
        <value>WEB-INF/mapping/Author.hbm.xml</value>
      </list>
    </property>
    <property name="hibernateProperties">
 <props>
  <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop> 
  <prop key="hibernate.show_sql">true</prop> 
  <prop key="hibernate.hbm2ddl.auto">update</prop> 
  <prop key="hibernate.cache.use_second_level_cache">true</prop> …