hibernate懶載入異常處理

標籤：

1、實體類中使用lazy="false"

2、lazy="ture"   在web.xml中加入

      程式碼    <filter> 
     <filter-name>hibernateFilter</filter-name> 
     <filter-class> 
     org.springframework.orm.hibernate3.support.OpenSessionInViewFilter 
     </filter-class> 
  </filter 
  <filter-mapping> 
     <filter-name>hibernateFilter</filter-name> 
     <url-pattern>*.do</url-pattern> 
   </filter-mapping>     此方式容易遇到Write operations are not allowed in read-only mode問題，解決方案：重寫OpenSessionInViewFilter的2個方法     public class OpenSessionInViewFilter extends org.springframework.orm.hibernate3.support.OpenSessionInViewFilter {
 

     
        /**
         * we do a different flushmode than in the codebase
         * here
         */
        protected Session getSession(SessionFactory sessionFactory) throws DataAccessResourceFailureException {
                Session session = SessionFactoryUtils.getSession(sessionFactory, true);
                session.setFlushMode(FlushMode.COMMIT);
                return session;
        }
        /**
         * we do an explicit flush here just in case
         * we do not have an automated flush
         */
        protected void closeSession(Session session, SessionFactory factory) {
                session.flush();
                super.closeSession(session, factory);
        }
}

hibernate懶載入異常處理