急：为什么会有这个错误？

Question

可能没有配置好，我的也是jbuilder7.0+weblogic7.0，运行正常

Answer 1

String homeName = (String)httpServletRequest.getParameter("jNDIHomeName");    String homeInterfaceName = (String)httpServletRequest.getParameter("ejbHome");
    Class homeInterface = null;
    if (homeInterfaceName != null) {
      try {
        homeInterface = Class.forName(homeInterfaceName);
      } catch (ClassNotFoundException ex) {
      }
    }    EJBHome home = null;
    try {
      Object homeObject = getInitialContext().lookup(homeName);
      if (homeInterface == null) {
        homeInterface = homeObject.getClass();
      }
      home = (EJBHome)PortableRemoteObject.narrow(homeObject, homeInterface);
    } catch (NamingException ex) {
    }    Method homeMethod = home.getClass().getMethod("create", new Class[]{});    EJBObject remote =  (EJBObject)homeMethod.invoke(home, new Object[]{});
    List list = null;
    if (remote instanceof ejbsample) {
      list = ((ejbsample)remote).selectData(httpServletRequest);
    }
    httpServletRequest.setAttribute("result" ,list);

Answer 2

private Context getInitialContext() throws NamingException {
    try {
      // Get an InitialContext
      String url = servletConfig.getInitParameter("EJBProviderURL");
      String EJBInitialContextFactory = servletConfig.getInitParameter("EJBInitialContextFactory");
      Properties h = new Properties();
      h.put(Context.INITIAL_CONTEXT_FACTORY, EJBInitialContextFactory);
      h.put(Context.PROVIDER_URL, url);
      return new InitialContext(h);
    } catch (NamingException ne) {
      throw ne;
    }
  }

Answer 3

再web.xml中配置<web-app>
  <context-param>
    <param-name>EJBProviderURL</param-name>
    <param-value>http://localhost:7001</param-value>
    <description>url</description>
  </context-param>
  <context-param>
    <param-name>EJBInitialContextFactory</param-name>
    <param-value>weblogic.jndi.WLInitialContextFactory</param-value>
    <description>contextFactory</description>
  </context-param>
  
  <servlet>
    <servlet-name>commonServlet</servlet-name>
    <servlet-class>examples.servlets.CommonServlet</servlet-class>
    <init-param>
      <param-name>EJBProviderURL</param-name>
      <param-value>http://localhost:7001</param-value>
    </init-param>
    <init-param>
      <param-name>EJBInitialContextFactory</param-name>
      <param-value>weblogic.jndi.WLInitialContextFactory</param-value>
    </init-param>
  </servlet>
  
  <servlet-mapping>
    <servlet-name>commonServlet</servlet-name>
    <url-pattern>/commonServlet/*</url-pattern>
  </servlet-mapping>
  
  <taglib>
    <taglib-uri>
      mytaglib
    </taglib-uri>
    <taglib-location>
      /WEB-INF/taglib/MyTaglib.tld
    </taglib-location>
  </taglib></web-app>