新手上路：：怎么样通过applet或者是Application调用EJB? 急

EJB Test Client是包含在EJB包中的。
我说的是独立采用Applet或者Application来调用这个EJB.
我是新手，可能意思表达不清楚:
EJB已经发布了，能不能用Applet在另外一抬机器上调用这个EJB呢？
在Applet中怎么调用？

”EJB Test Client是包含在EJB包中的“？？？谁告诉你的！！！EJB Test Client不包含在包里！！
并且EJB Test Client可以在另外一抬机器上调用这个EJB！！（EJB必须实现remote接口）

不好意思，看错了。
EJB我已实现了remote接口。
但不知道怎么使用EJB Test Client在另外一抬机器上调用这个EJB

上面没说明白。
只要EJB实现remote接口，那EJB Test Client就可以远程调用了。
我想知道的是，如果菜用Applet的话，程序里怎么调用这个EJB呢？

将EJB Test Client.java在另一台机器上编译运行

package com.todaytech.servlet;import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import java.net.*;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;import com.todaytech.sb.testdb.*;public class TestSvlt extends HttpServlet {
  private static final String CONTENT_TYPE = "text/html; charset=EUC_CN";
  //Initialize global variables
  public void init() throws ServletException {
  }
  //Process the HTTP Get request
  public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    doPost(request,response);
  }
  //Process the HTTP Post request
  public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    response.setContentType("application/octest-stream");
    request.setCharacterEncoding("gb2312");
    ServletInputStream input = request.getInputStream();
    DataInputStream dis = new DataInputStream(input);
    String sTmp = dis.readUTF();
    System.out.println("È¡µÃµÄ×Ö·û´®Î¢£º " + sTmp);
    StringTokenizer st = new StringTokenizer(sTmp,"|");
    int length = st.countTokens();
    String sCmd = st.nextToken();
    String rtnStr = "init is ok!";
    TSB tsb = getSb();
    if ("add".equals(sCmd)){
      int id = 1;
      if (length > 1){
        String sid = st.nextToken();
        if (!(sid == null || "".equals(sid))){
          try
          {
            id = Integer.parseInt(sid);
          }
          catch (Exception ex)
          {
            id = 1;
          }
        }
      }
      tsb.add(id);
      rtnStr = "ok ! ³É¹¦£¡";
    }
    else if ("set".equals(sCmd)){
      String s50 = "Ò»Ò»Ò»Ò»Ò»Ò»Ò»Ò»Ò»Ò»Ò»¶þ¶þ¶þ¶þ¶þ¶þ¶þ¶þ¶þ¶þÈýÈýÈýÈýÈýÈýÈýÈýÈýÈýËÄËÄËÄËÄËÄËÄËÄËÄËÄËÄÎåÎåÎåÎåÎåÎåÎåÎåÎåÎå";
      if (length > 1){
        String s50Tmp = st.nextToken();
        if (!(s50Tmp == null || "".equals(s50Tmp))){
          s50 = s50Tmp;
        }
      }
      int id = 1;
      if (length > 2) {
        String sid = st.nextToken();
        if (! (sid == null || "".equals(sid))) {
          try {
            id = Integer.parseInt(sid);
          }
          catch (Exception ex) {
            id = 1;
          }
        }
      }
      tsb.setTest50(s50, id);
      rtnStr = "ok ! ³É¹¦£¡";
    }
    else if ("get".equals(sCmd)){
      int id = 1;
      if (length > 1) {
        String sid = st.nextToken();
        if (! (sid == null || "".equals(sid))) {
          try {
            id = Integer.parseInt(sid);
          }
          catch (Exception ex) {
            id = 1;
          }
        }
      }
     rtnStr = tsb.getTest50(id);
    }
    else {
      try{
        tsb.setTest50(tsb.getTest50(1), 2);
        rtnStr = "ok ! ³É¹¦!";
      }
      catch(Exception ex){
        ex.printStackTrace();
        rtnStr = ex.getMessage();
      }
    }
    DataOutputStream dos = new DataOutputStream(response.getOutputStream());
    dos.writeUTF(rtnStr);
    dos.close();
  }
  //Clean up resources
  public void destroy() {
  }  private TSB getSb(){
    try
    {
      TSBHome tsbh = null;
      InitialContext jndiContext = new InitialContext();
      Object ref  = jndiContext.lookup("TSB");
      tsbh = (TSBHome) PortableRemoteObject.narrow(ref, TSBHome.class);
      return tsbh.create();
    }
    catch (Exception ex)
    {
      ex.printStackTrace();
      return null;
    }  }
}

package com.todaytech.applet;import java.awt.*;
import java.awt.event.*;
import javax.swing.*;import java.io.*;
import java.net.*;
import java.util.*;
public class mainFram extends JFrame {
  JPanel contentPane;
  JButton call = new JButton();
  JTextField cad = new JTextField();  //Construct the frame
  public mainFram() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    call.setBounds(new Rectangle(109, 227, 225, 59));
    call.setText("jButton1");
    call.addActionListener(new mainFram_call_actionAdapter(this));
    contentPane.setLayout(null);
    this.setSize(new Dimension(455, 379));
    this.setTitle("²âÊÔ");
    cad.setText("jTextField1");
    cad.setBounds(new Rectangle(11, 27, 429, 36));
    contentPane.add(call, null);
    contentPane.add(cad, null);
  }
  //Overridden so we can exit when window is closed
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }  private void callCmd(){
    try{
      URL url = new URL("http://localhost:7001/twebapp/testsvlt");
      URLConnection urlcon = url.openConnection();
      urlcon.setUseCaches(true);
      urlcon.setDoInput(true);
      urlcon.setDoOutput(true);
      //urlcon.connect();
      urlcon.setRequestProperty("Content-type", "application/octest-stream");
      DataOutputStream dos = new DataOutputStream(urlcon.getOutputStream());
      dos.writeUTF(cad.getText());
      dos.flush();
      dos.close();
      DataInputStream dis=new DataInputStream(urlcon.getInputStream());
      String rtnCode = dis.readUTF();
      dis.close();
      System.out.println(rtnCode);
    }
    catch(Exception ex){
      ex.printStackTrace();
    }  }  void call_actionPerformed(ActionEvent e) {
    System.out.println(cad.getText());
    callCmd();
  }}class mainFram_call_actionAdapter implements java.awt.event.ActionListener {
  mainFram adaptee;  mainFram_call_actionAdapter(mainFram adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.call_actionPerformed(e);
  }
}

上面分别事servlet和app的代码你看的有&符号的是中文码你自己转换一下呵呵记得给分呀

一下是客户端代码,调用weblogic7.0应用服务器EJB对象方法..
package examples;import javax.ejb.*;
import javax.naming.*;
import java.rmi.*;
import java.util.*;/**
* Client test application on a Container-Managed Entity Bean, Product.
*/
public class ProductClient { public static void main(String[] args) throws Exception { ProductHome home = null; try {
/*
* Get a reference to the Product Home Object - the
* factory for Product EJB Objects
*/
Context ctx = new InitialContext(System.getProperties());
home = (ProductHome) javax.rmi.PortableRemoteObject.narrow(ctx.lookup("RemoteProductHome"), ProductHome.class); /*
* Use the factory to create the Product EJB Object
*/
home.create("123-456-7890", "P5-350", "350 Mhz Pentium", 200);
home.create("123-456-7891", "P5-400", "400 Mhz Pentium", 300);
home.create("123-456-7892", "P5-450", "450 Mhz Pentium", 400);
home.create("123-456-7893", "SD-64", "64 MB SDRAM", 50);
home.create("123-456-7894", "SD-128", "128 MB SDRAM", 100);
home.create("123-456-7895", "SD-256", "256 MB SDRAM", 200); /*
* Find a Product, and print out it's description
*/
Iterator i = home.findByName("SD-64").iterator();
System.out.println("The following product descriptions match the product name SD-64:");
while (i.hasNext()) {
Product prod = (Product) javax.rmi.PortableRemoteObject.narrow(i.next(), Product.class);
System.out.println(prod.getDescription());
} /*
* Find all products that cost $200
*/
System.out.println("Calling finder to find all products that cost $200");
i = home.findByBasePrice(200).iterator(); while (i.hasNext()) {
Product prod = (Product) javax.rmi.PortableRemoteObject.narrow(i.next(), Product.class);
System.out.println(prod.getDescription());
}
}
catch (Exception e) {
e.printStackTrace();
}
finally {
if (home != null) {
System.out.println("Destroying products.."); /*
* Find all the products
*/
Iterator i = home.findAllProducts().iterator();
while (i.hasNext()) {
try {
Product prod = (Product) javax.rmi.PortableRemoteObject.narrow(i.next(), Product.class);
if (prod.getProductID().startsWith("123")) {
prod.remove();
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
}
}
}

下面是BEAN 代码package examples;import javax.ejb.*;/**
* Entity Bean which demonstrates Container-Managed persistence.
*
* This is a product that's persistent.  It has an ID #, a name,
* a description, and a base price.
*/
public abstract class ProductBean implements EntityBean { protected EntityContext ctx; public ProductBean() {
} //----------------------------------------------------------------
// Begin abstract get/set methods
//----------------------------------------------------------------        public abstract String getName();
public abstract void setName(String name);
public abstract String getDescription();
public abstract void setDescription(String description);
        public abstract double getBasePrice();
        public abstract void setBasePrice(double price);
public abstract String getProductID();
public abstract void setProductID(String productID); //----------------------------------------------------------------
// End abstract get/set methods
//---------------------------------------------------------------- //----------------------------------------------------------------
// Begin EJB-required methods.  The methods below are called
// by the Container, and never called by client code.
//---------------------------------------------------------------- /**
* Called by Container.
* Implementation can acquire needed resources.
*/
public void ejbActivate() {
System.out.println("ejbActivate() called.");
} /**
* EJB Container calls this method right before it
* removes the Entity Bean from the database.
* Corresponds to when client calls home.remove().
*/
public void ejbRemove() {
System.out.println("ejbRemove() called.");
} /**
* Called by Container.
* Releases held resources for passivation.
*/
public void ejbPassivate() {
System.out.println("ejbPassivate () called.");
} /**
* Called from the Container.  Updates the entity bean
* instance to reflect the current value stored in
* the database.
*
* Since we're using Container-Managed Persistence, we
* can leave this method blank.  The EJB Container will
* automatically set our public fields to the correct values.
*/
public void ejbLoad() {
System.out.println("ejbLoad() called.");
} /**
* Called from the Container.  Updates the database to
* reflect the current values of this in-memory Entity Bean
* instance representation.
*
* Since we're using Container-Managed Persistence, we can
* leave this method blank.  The EJB Container will
* automatically save our public fields into the database.
*/
public void ejbStore() {
System.out.println("ejbStore() called.");
} /**
* Called by Container.  Associates this Bean instance with
* a particular context.  Once done, we can query the
* Context for environment info
*/
public void setEntityContext(EntityContext ctx) {
System.out.println("setEntityContext called");
this.ctx = ctx;
} /**
* Called by Container.  Disassociates this Bean instance
* with a particular context environment.
*/
public void unsetEntityContext() {
System.out.println("unsetEntityContext called");
this.ctx = null;
} /**
* Called after ejbCreate().  Now, the Bean can retrieve
* its EJBObject from its context, and pass it as a 'this'
* argument.
*/
public void ejbPostCreate(String productID, String name, String description, double basePrice) {
System.out.println("ejbPostCreate() called");
} /**
* This is the initialization method that corresponds to the
* create() method in the Home Interface.
*
* When the client calls the Home Object's create() method,
* the Home Object then calls this ejbCreate() method.
*
* NOTE: Since we're using Container-Managed persistence,
* this method returns void.  With Bean-Managed Persistence,
* we returned the PK.  This is because our Bean was
* responsible for dealing with PKs and accessing
* the database.  Now that we let the Container handle
* persistence, the Container makes the Primary Key.
*
* We still need to initialize our Bean's fields with the
* parameters passed from the client, so that the Container
* can inspect our Bean and create the corresponding database
* entries.
*/
public String ejbCreate(String productID, String name, String description, double basePrice) {
System.out.println("ejbCreate() called"); setProductID(productID);
setName(name);
setDescription(description);
setBasePrice(basePrice); return productID;
} // No finder methods - they are implemented by Container //----------------------------------------------------------------
// End EJB-required methods
//----------------------------------------------------------------
}

总结起来其实,很简单:
在EJB2.0中,从应用程序中查找HOME对象:Properties prop = new Properties( );
prop.put(Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
prop.put(Context.PROVIDER_URR,"t3://localhost:7001");
Context ctx = new InitialContext(prop);
home = (ProductHome) javax.rmi.PortableRemoteObject.narrow(ctx.lookup("RemoteProductHome"), ProductHome.class);home.create("123-456-7890", "P5-350", "350 Mhz Pentium", 200);//创建并初始化EJB对象

和EJB Test Client里一样啊,只不过换成了APPLET而已

我的EJB发布在
C:\bea\user_projects\mydomain\myserver\upload\EJBTest\EJBTest.jar
其中有2个自己写的方法getName和getMyText.
要在Applet中调用EJB中的这2个方法，怎么调用？大家一下贴这么多，谢谢了，不过，反倒不明白了。

把jb8生成的TestClient.java考在另一台机子上
javac -classpath ".;weblogic.jar" test\TestClient.java
java -classpath ".;weblogic.jar" test.TestClienttest中的文件清单：
testRemote.class <--------EJB远程接口
testRemoteHome.class 〈-------EJB Home接口
TestClient.java weblogic.jar要包括在类路径中！！如何调用自己写的方法getName和getMyText，可以研究一下jb8自动生成的例子
用Applet的话也差不多

我的EJB发布在
C:\bea\user_projects\mydomain\myserver\upload\EJBTest\EJBTest.jar    StringBuffer sbuf1 = new StringBuffer();
    URL url1 = new URL("http://localhost:7001/"); //在这里应该什么？
    this.getStringFromUrl(url1,sbuf1);

调试易

新手上路：：怎么样通过applet或者是Application调用EJB? 急

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