伤心

去掉与Hibernate有关的HibernateUtil,HibernateFilter, 以及所有的Hibernate配置和映射文件~_~

IUserDAO, IMessageDAO等DAO接口基本不变，只需要在类前面加上@Remote~_~

DAO接口的实现基本不变，只需要在类前面加上@Stateless，并定义一个叫javax.persistence.EntityManager的万能类（和Spring中的 getHibernateTemplate()差不多但是比它还要简单~_~）

DAO接口的EJB3实现像下面这样

@Stateless
public   class  MessageDAO  implements  IMessageDAO {

    @PersistenceContext(type = PersistenceContextType.TRANSACTION, unitName  =   " message " )
     private  EntityManager manager;

     public   void  saveMessage(Message m) {
        manager.persist(m);
    }

     public   void  updateMessage(Message m) {
         if  (manager.find(Message. class , m.getId())  ==   null ) {
             throw   new  RuntimeException( " Unable to update  "   +  m
                     +   "  because there is no prior version " );
        }
        manager.merge(m);
    }

     public  List getMessages() {
        String sql  =   " select m from Message m " ;
         return  manager.createQuery(sql).getResultList();
    }

     public   void  deleteMessage(String id, String userId) {
        Message msg  =  getMessage(id);
         if  (msg  ==   null ) {
             throw   new  MessageDAOException( " Can't find the message u wanna del! " );
        }
         if  ( ! msg.getUser().getId().equals(userId)) {
             throw   new  MessageDAOException( " U cannot del others' message! " );
        }
         if  (manager.contains(msg)) {
            manager.remove(msg);
        }  else  {
            removeMessage(msg.getId());
        }
    }

     public   void  removeMessage(String id) {
        manager.createQuery( " DELETE FROM Message m WHERE m.id = :mid " )
                .setParameter( " mid " , id).executeUpdate();
    }

     public  Message getMessage(String id) {
         return  (Message) manager.find(Message. class , id);
    }

}

（看看是不是比Hibernate3.0简单，好像Hibernate3.2和这个一样，偶还没试过3.2）

最后最关键的是实体定义和映射,到regsaga上面看了篇讲解Annotation的文章 （ http://wiki.redsaga.com/confluence/display/HART/Mapping+entity+bean+associations+relationships ）
原来Hibernate和EJB3的注解出自同门，我好像又明白了一点什么~_~

改完了，要开始测试了，真是激动人心。

确保D:\jboss-4.0.4.GA\server\default\lib\mysql-connector-java-3.1.12-bin.jar

然后拷贝D:\jboss-4.0.4.GA\docs\examples\jca\mysql-ds.xml
到D:\jboss-4.0.4.GA\server\default\deploy并做小部分修改 ~_~。
好像还要加一个persistence.xml一起打在jar包里边。写一个Ant任务吧，大家都这么做（还没有在Eclipse下打包并发布的经验，只会 JBuilder~_~）

几番周折，给Ant加了打jar包打war包以及deploy的任务。
启动JBoss-4.0.4-GA,出了些错误，一一改正。。

JUnit测试通过了，但打开JSP页面注册时报错

18:31:28,859 ERROR [[jsp]] Servlet.service() for servlet jsp threw exception
java.lang.reflect.UndeclaredThrowableException
 at $Proxy177.saveUser(Unknown Source)
 at org.apache.jsp.regist_jsp._jspService(regist_jsp.java:64)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at cn.hxex.message.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:127)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
 at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175)
 at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
 at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
 at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
 at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
 at java.lang.Thread.run(Thread.java:595)
Caused by: java.io.NotSerializableException: cn.hxex.message.model.User
 at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
 at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1245)
 at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1069)
 at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:291)
 at java.rmi.MarshalledObject.<init>(MarshalledObject.java:92)
 at org.jboss.aop.joinpoint.MethodInvocation.writeExternal(MethodInvocation.java:318)
 at org.jboss.serial.persister.ExternalizePersister.writeData(ExternalizePersister.java:58)
 at org.jboss.serial.objectmetamodel.ObjectDescriptorFactory.describeObject(ObjectDescriptorFactory.java:275)
 at org.jboss.serial.objectmetamodel.DataContainer$DataContainerOutput.writeObject(DataContainer.java:386)
 at org.jboss.serial.io.MarshalledObjectForLocalCalls.<init>(MarshalledObjectForLocalCalls.java:38)
 at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:57)
 at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)
 at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:102)
 ... 29 more
始终没法解决，非常伤心，也很郁闷。决定先放弃一段时间。。。。。。。。