servlet调用ejb一直出现的问题!

我已经知道了。假如你的EJB为A，你将A.class,AHome.class放到你的webApplication的WEB-INF/classes下面就行了。注意包名的问题。要不然就会出现转型错误。你小心我告你盗版啊。
哈哈……

解决方案 »

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我的WEB-INF/classes/hh/ 下有那两个文件,不是直接在class下,
可错误依然,
我盗版你,却盗版不了你的成功!
唉~~~~~~~~
你不要新建那两个接口类，直接从JB的发布目录（classes）复制这两个接口类到Web服务器的classes相应目录下试试
我是把这两个接口类复制过去的,ejb项目是aa, 我新建的测试的项目是bb,
我在测试项目上新建web和servlet,复制了aa的src下的remote.java和home.java,
到bb的src下,并把remote.java的package aa改做package bb,然后编绎成.war,并布暑成功!
然后运行servlet就出现了上面的问题!
后来我又把aa下的remote.class和home.class拷到bb下的class,还是不行!
还是有上面问题!
错误信息:
start...lookup OKError narrow:Cannot narrow remote object to qq.bean1Homecreate:null Error in HelloWorld(): Remote interface reference is null. It must be created by calling one of the Home interface methods first. Calling HelloWorld() null  ambest(许愿) ：我servlet程序和你一样的！（在上面）
servlet程序：package qq;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import javax.naming.*;
import java.util.Properties;
import javax.rmi.PortableRemoteObject;
/**
* Title: ambest
* Description: EJBtest
* Copyright: Copyright (c) 2003
* Company: AMB
* @author ambest
* @version 1.0
*/public class Servlet extends HttpServlet {
 private static final String CONTENT_TYPE = "text/html; charset=GBK";
 private static final String ERROR_NULL_REMOTE = "Remote interface reference is null. It must be created by calling one of the Home interface methods first.";
 private static final int MAX_OUTPUT_LINE_LENGTH = 100;
 private boolean logging = true;
 private bean1Home h= null;
 private bean1 b= null;
 PrintWriter out; private Context getInitialContext() throws Exception {
 String url = "t3://hzh:7003";
 String user = null;
 String password = null;
 Properties properties = null;
 try {
 properties = new Properties();
 properties.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
 properties.put(Context.PROVIDER_URL, url);
 if (user != null) {
 properties.put(Context.SECURITY_PRINCIPAL, user);
 properties.put(Context.SECURITY_CREDENTIALS, password == null ? "" : password);
 } return new InitialContext(properties);
 }
 catch(Exception e) {
 out.println("Unable to connect to WebLogic server at " + url);
 out.println("Please make sure that the server is running.");
 throw e;
 }
 } //Initialize global variables
 public void init() throws ServletException {
 }
 //Process the HTTP Get request
 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 response.setContentType(CONTENT_TYPE);
 out = response.getWriter();
 out.println("<html>");
 out.println("<head><title>ServletEJBTest</title></head>");
 out.println("<body>"); long startTime = 0;
 try {
 //get naming context
 Context context = getInitialContext();
 out.println(" start... ");//调试时的输出信息。
 //look up jndi name
 Object ref = context.lookup("bean1");
 out.println("lookup OK ");
 //look up jndi name and cast to Home interface
 //sessionBean1Home = (SessionBean1Home)ref;
 h=(bean1Home)PortableRemoteObject.narrow(ref,bean1Home.class);
 //这两种方法是同样的问题。
 //错误码应该是在这一行出的问题吧。
 if (logging) {
 long endTime = System.currentTimeMillis();
 out.println("Succeeded initializing bean access through Home interface.");
 out.println("Execution time: " + (endTime - startTime) + " ms.");
 }
 }
 catch(Exception e) {
 out.println("Error narrow:"+e.getMessage()+" ");
 }
 //create();
 try {
 b =h.create();
 out.println("create ok");
 if (logging) {
 long endTime = System.currentTimeMillis();
 out.println("Succeeded: create()");
 out.println("Execution time: " + (endTime - startTime) + " ms.");
 }
 }
 catch(Exception e) {
 out.println("create:"+e.getMessage());
 } if (b== null) {
 out.println("Error in HelloWorld(): " + ERROR_NULL_REMOTE);
 }
 out.println("Calling HelloWorld()");
 startTime = System.currentTimeMillis(); try {
 out.println("Hello World:"+b.helloworld("ddd"));
 if (logging) {
 long endTime = System.currentTimeMillis();
 out.println("Succeeded: HelloWorld()");
 out.println("Execution time: " + (endTime - startTime) + " ms.");
 }
 }
 catch(Exception e) {
 out.println(e.getMessage());
 } //out.println("The servlet has received a " + request.getMethod() + ". This is the reply.");
 out.println("</body></html>");
 }
 //Process the HTTP Post request
 public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 doGet(request, response);
 }
 //Clean up resources
 public void destroy() {
 }
}