package csejb;import javax.naming.*;import java.util.Properties;import javax.rmi.PortableRemoteObject;public class CsClient {  private theServerHome theServerHomeObject = null;  //創建一個訪問EJB的客戶端應用程序  public CsClient() {    try {      //得到名字上下文      Context ctx = getInitialContext();      //查詢jndi名      Object ref = ctx.lookup("theServer");      //通過強制轉型得到Home接口      theServerHomeObject = (theServerHome) PortableRemoteObject.narrow(ref, theServerHome.class);    }    catch(Exception e) {      e.printStackTrace();    }  }	//這個函數返回一個經過初始化的上下文  private Context getInitialContext() throws Exception {    String url = "t3://cgb-4wn01xj69v6:7001";    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) {      System.out.println("Unable to connect to WebLogic server at " + url);      System.out.println("Please make sure that the server is running.");      throw e;    }  }  //----------------------------------------------------------------------------  // 工具函數  //----------------------------------------------------------------------------  public theServerHome getHome() {    return theServerHomeObject;  }  //Main函數  public static void main(String[] args) {    String retStr="This is C/S EJB example.\n";     CsClient client = new CsClient();	  //用client的getHome()函數調用Home接口函數得到遠程接口的引用     // 用遠程接口的引用訪問EJB    try {      retStr=retStr+"Now the Client application is ready to access the Server.\n";      theServer theServer=client.getHome().create();      retStr=retStr+theServer.CServer();      retStr=retStr+"This is client speaking.\nThe example is over!\n";      System.out.print(retStr);    }    catch(Exception e) {        e.printStackTrace();    }  }}