java.lang.ClassCastException: $Proxy71 cannot be cast to com.nfschina.dao.NewsDao

0 0

java.lang.ClassCastException: $Proxy71 cannot be cast to com.nfschina.dao.NewsDao10

我被这个问题折腾了好半天了，还没找到合适的答案，下面是我jsp代码

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ page
 import="com.test.dao.*,com.test.model.*,
 javax.naming.*,java.util.*"%>
 



<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

  <head>

    

    <title>My JSP 'index.jsp' starting page</title>

	<meta http-equiv="pragma" content="no-cache">

	<meta http-equiv="cache-control" content="no-cache">

	<meta http-equiv="expires" content="0">    

	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">

	<meta http-equiv="description" content="This is my page">

	<!--

	<link rel="stylesheet" type="text/css" href="styles.css">

	-->

  </head>

  

  <body>

  

  <table width=80%>

<tr>

<td>id</td>

<td>title</td>

<td>content</td>

<td>type</td>

<td>pic</td>

<td>createtime</td>

</tr>



<%

try{

Properties props =new Properties();

props.setProperty("java.naming.factory.initial",

"org.jnp.interfaces.NamingContextFactory");

props.setProperty("java.naming.provider.url",

		"localhost:1099");

props.setProperty("java.naming.factory.url.pkgs", 

		"org.jboss.naming");

 InitialContext ctx=new InitialContext();

 NewsDao newsdao=(NewsDao)ctx.lookup("NewsDaoImpl/remote");

 

News news1 =new News();

 news1.setTitle("李永翠");

 news1.setType((int)27);

 news1.setCreatetime(new Date());

 news1.setContent("zhonguo ");

 news1.setPic("ag");

 newsdao.insert(news1);



List<News> newss=newsdao.getList();

 for(News news:newss){

  out.println("<tr><td>"+news.getId()+"</td><td>"+news.getTitle()

  +"</td><td>"+news.getContent()+"</td><td>"+news.getType()+

  "</td><td>"+news.getPic()+"</td><td>"+news.getCreatetime()+"</td><tr>");

  }

 }catch(Exception e){

  e.printStackTrace();}

 %>

</table>

  

  </body>

</html>

问题补充：NewsDao.java代码如下
[code =java]package com.test.dao;

import java.util.List;

import javax.ejb.Remote;

import com.test.model.News;

/**
* Local interface for NewsFacade.
*
* @author MyEclipse Persistence Tools
*/

@Remote
public interface NewsDao {

public void insert(News news);

public void update(String title,int id);

public void merge(News news);

public void delete(int id);

public News getById(int id);

public List<News> getList();

}

NewsDaoImpl.java代码如下
[code=java]package com.test.dao.impl;

import java.util.List;

import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

import com.test.dao.NewsDao;
import com.test.model.News;

/**
* Facade for entity News.
*
* @see com.jov.project.model.News
* @author MyEclipse Persistence Tools
*/
@Stateless

public class NewsDaoImpl implements NewsDao {
public NewsDaoImpl()
{

}

@PersistenceContext(unitName="test")
protected EntityManager em;

public void insert(News news){
em.persist(news);

}

public void update(String title,int id){
News news=em.find(News.class, id);
if(news!=null) news.setTitle(title);
}

public void merge(News news){
em.merge(news);

}

public void delete(int id){
News news=em.find(News.class, id);
if(news!=null) em.remove(news);

}

public News getById(int id){
return em.find(News.class, id);

}

@SuppressWarnings({ "unchecked" })
public List<News> getList() {
// TODO Auto-generated method stub
Query query=em.createQuery("select o from News o order by o.id");
return (List<News>)query.getResultList();
}

}

News就是entity bean，自己第一次用EJB做项目，问题多多啊