100分相送（EJB问题）

请各位帮我看看程序：
bean类:
  ejb1.java:
  package aejb;
  import javax.ejb.EJBObject;
  import java.rmi.*;
  public interface ejb1
    extends EJBObject {
   public String getName() throws RemoteException;
  }  ejb1Home.java:
  package aejb;
  import javax.ejb.EJBHome;
  import javax.ejb.CreateException;
  import java.rmi.RemoteException;
  public interface ejb1Home
    extends EJBHome {
  public ejb1 create() throws CreateException, RemoteException;
  }  ejb1Bean.java:
  package aejb;
  import javax.ejb.SessionBean;
  import javax.ejb.SessionContext;
  import javax.ejb.CreateException;
  public class ejb1Bean
    implements SessionBean {
  SessionContext sessionContext;  public void ejbRemove() {}  public void ejbActivate() {}  public void ejbPassivate() {}  public void setSessionContext(SessionContext sessionContext) {
    this.sessionContext = sessionContext;
  }  public String getName() {
    return "Hello World";
  }  public void ejbCreate() throws CreateException {
  }
}
打包成EJBModule1.jar
其中weblogic-ejb-jar:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE weblogic-ejb-jar PUBLIC "-//BEA Systems, Inc.//DTD WebLogic 8.1.0 EJB//EN" "http://www.bea.com/servers/wls810/dtd/weblogic-ejb-jar.dtd">
<weblogic-ejb-jar>
  <weblogic-enterprise-bean>
    <ejb-name>ejb1</ejb-name>
    <jndi-name>ejb1</jndi-name>
  </weblogic-enterprise-bean>
</weblogic-ejb-jar>
然后把EJBModule1.jar部署到weblogic8applet客户端：
package aejb;import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;
import java.util.*;
import javax.swing.*;public class applet extends Applet {
  private boolean isStandalone = false;
  String var0;
  BorderLayout borderLayout1 = new BorderLayout();
  Panel UpperPanel = new Panel();
  Panel LowerPanel = new Panel();
  Panel panel1 = new Panel();
  CardLayout cardLayout1 = new CardLayout();
  Panel panel2 = new Panel();
  BorderLayout borderLayout2 = new BorderLayout();
  BorderLayout borderLayout3 = new BorderLayout();
  Choice choice1 = new Choice();
  Label label1 = new Label();
  Label label2 = new Label();
  Label label3 = new Label();
  CheckboxGroup checkboxGroup1 = new CheckboxGroup();
  ejb1Home home;
  ejb1 ejb;
  String err=null;  //Get a parameter value
  public String getParameter(String key, String def) {
    return isStandalone ? System.getProperty(key, def) :
      (getParameter(key) != null ? getParameter(key) : def);
  }  //Construct the applet
  public applet() {
  }  //Initialize the applet
  public void init() {
    try {
      var0 = this.getParameter("param0", "");
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    try {
      jbInit();
    }
    catch(Exception e) {
      err=e.toString();
    }
    if(err!=null){
      Label a=new Label(err);
      UpperPanel.add(a, null);
    }
  }
  private Context InitialContext() throws Exception {
    String url = "t3://localhost:7001";
    String user = "weblogic";
    String password = "12345678";
    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) {
      throw e;
    }
  }  //Component initialization
  private void jbInit() throws Exception {
    this.setLayout(borderLayout1);
    choice1.addItem("EngLish");
    choice1.addItem("Chinese");
    choice1.addItem("ejb");
    UpperPanel.setBackground(Color.cyan);
    LowerPanel.setBackground(Color.pink);
    LowerPanel.setLayout(cardLayout1);
    panel2.setLayout(borderLayout2);
    panel1.setLayout(borderLayout3);
    panel1.setBackground(Color.white);
    panel1.setLocale(java.util.Locale.getDefault());
    panel2.setBackground(Color.pink);
    label1.setFont(new java.awt.Font("Dialog", 0, 20));
    label1.setText("Select a language");
    label2.setAlignment(Label.CENTER);
    label2.setFont(new java.awt.Font("Dialog", 0, 24));
    label2.setLocale(java.util.Locale.getDefault());
    label2.setText("晚安!");
    label3.setAlignment(Label.CENTER);
    label3.setFont(new java.awt.Font("Dialog", 0, 24));
    label3.setForeground(Color.green);
    label3.setText("Good Evening");    choice1.addItemListener(new HelloApplet_choice1_itemAdapter(this));    this.add(UpperPanel,  BorderLayout.NORTH);
    UpperPanel.add(label1, null);
    UpperPanel.add(choice1, null);
    this.add(LowerPanel, BorderLayout.CENTER);
    LowerPanel.add(panel1, "panel1");
    panel1.add(label3,  BorderLayout.CENTER);
    LowerPanel.add(panel2,  "panel2");
    panel2.add(label2,  BorderLayout.CENTER);  }  //Start the applet
  public void start() {
  }  //Stop the applet
  public void stop() {
  }  //Destroy the applet
  public void destroy() {
  }  //Get Applet information
  public String getAppletInfo() {
    return "Applet Information";
  }  //Get parameter info
  public String[][] getParameterInfo() {
    String[][] pinfo =
      {
      {"param0", "String", ""},
      };
    return pinfo;
  }  void choice1_itemStateChanged(ItemEvent e) {
     if("EngLish".equals(choice1.getSelectedItem())){
       cardLayout1.show(LowerPanel,"panel1");
     }
     else if("Chinese".equals(choice1.getSelectedItem()))
     {cardLayout1.show(LowerPanel,"panel2");}
     else{
       try{
String name="";
Context context=InitialContext();
Object obj=context.lookup("ejb1");
home=(ejb1Home)PortableRemoteObject.narrow(obj,ejb1Home.class);
if(obj==null)name="obj is null";
if(home==null)name="home is null";
ejb=home.create();
if(ejb==null)name="ejb is null";
name=ejb.getName();
JOptionPane.showMessageDialog(null,name);
if(name==null||name=="")name="null";
Label lab=new Label(name);
Panel p=new Panel();
p.add(lab);
LowerPanel.add(p,"ejb");
cardLayout1.show(LowerPanel,"ejb");
       }catch(Exception evt){
String err=evt.toString();
String er="";
while(err.length()>0){
   if(err.length()>30){er=er+err.substring(0,30)+"\n";err=err.substring(30);}
   else{er+=err;err="";}
}
TextArea text=new TextArea(10,35);
text.setText(er);
Panel p=new Panel();
p.add(text);
LowerPanel.add(p,"ejb");
cardLayout1.show(LowerPanel,"ejb");       }
     }
  }
}class HelloApplet_choice1_itemAdapter implements java.awt.event.ItemListener {
  applet adaptee;  HelloApplet_choice1_itemAdapter(applet adaptee) {
    this.adaptee = adaptee;
  }
  public void itemStateChanged(ItemEvent e) {
    adaptee.choice1_itemStateChanged(e);
  }
}
然后把applet.class,ejb1.class,ejb1Home.class,weblogic.jndi.WLInitialContextFactory.class打包成applet.jarapplet.html:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312">
<title>
HTML Test Page
</title>
</head>
<body>
aejb.applet will appear below in a Java enabled browser.<br>
<applet
  codebase = "."
  code     = "aejb.applet.class"
  archive="applet.jar"
  name     = "TestApplet"
  width    = "400"
  height   = "300"
  hspace   = "0"
  vspace   = "0"
  align    = "middle"
>
</applet>
</body>
</html>打开applet.html网页
单击其中下拉框，本来要远程调用，却一点反应都没有，也没有出错信息，请各位批评指正，不胜感激

调试易

100分相送（EJB问题）

解决方案 »