1：安裝Jboss.不需要設置classpath,直接安裝就好了。
2：EJB源文件：InterestCalculator.java（ 遠程接口）
package ejb;
// Java core libraries
import java.rmi.RemoteException;
// Java standard extensions
import javax.ejb.EJBObject;
public interface InterestCalculator extends EJBObject {
// set principal amount
public void setPrincipal( double amount )
throws RemoteException;
// set interest rate
public void setInterestRate( double rate )
throws RemoteException;
// set loan length in years
public void setTerm( int years )
throws RemoteException;
// get loan balance
public double getBalance() throws RemoteException;
// get amount of interest earned
public double getInterestEarned() throws RemoteException;
}
2： InterestCalculatorHome.java(本地接口)
package ejb;
// Java core libraries
import java.rmi.RemoteException;
// Java standard extensions
import javax.ejb.*;
public interface InterestCalculatorHome extends EJBHome {
// create InterestCalculator EJB
public InterestCalculator create() throws RemoteException,
CreateException;
}
3： InterestCalculatorBean .java(EJB的Bean文件，核心)
package ejb;
// Java core libraries
import java.util.*;
// Java standard extensions
import javax.ejb.*;
public class InterestCalculatorBean implements SessionBean {
private SessionContext sessionContext;
// state variables
private double principal;
private double interestRate;
private int term;
// set principal amount
public void setPrincipal( double amount )
{
principal = amount;
}
// set interest rate
public void setInterestRate( double rate )
{
interestRate = rate;
}
// set loan length in years
public void setTerm( int years )
{
term = years;
}
// get loan balance
public double getBalance()
{
// calculate simple interest
return principal * Math.pow( 1.0 + interestRate, term );
}
// get amount of interest earned
public double getInterestEarned()
{
return getBalance() - principal;
}
// set SessionContext
public void setSessionContext( SessionContext context )
{
sessionContext = context;
}
// create InterestCalculator instance
public void ejbCreate() {}
// remove InterestCalculator instance
public void ejbRemove() {}
// passivate InterestCalculator instance
public void ejbPassivate() {}
// activate InterestCalculator instance
public void ejbActivate() {}
}
4：EJB客戶端（注意： env.put(Context.PROVIDER_URL, "127.0.0.1:1099");
）1099端口為jboss下運行Jndi服務的端口，這個不能錯，我就是掛在這了。
package client;
// Java core libraries
import java.awt.*;
import java.awt.event.*;
import java.rmi.*;
import java.text.*;
import java.util.*;
// Java standard extensions
import javax.swing.*;
import javax.rmi.*;
import javax.naming.*;
import javax.ejb.*;
// Deitel libraries
import ejb.*;
public class InterestCalculatorClient extends JFrame {
// InterestCalculator remote reference
private InterestCalculator calculator;
private JTextField principalTextField;
private JTextField rateTextField;
private JTextField termTextField;
private JTextField balanceTextField;
private JTextField interestEarnedTextField;
// InterestCalculatorClient constructor
public InterestCalculatorClient()
{
super( "Stateful Session EJB Example" );
// create InterestCalculator for calculating interest
createInterestCalculator();
// create JTextField for entering principal amount
createPrincipalTextField();
// create JTextField for entering interest rate
createRateTextField();
// create JTextField for entering loan term
createTermTextField();
// create uneditable JTextFields for displaying balance
// and interest earned
balanceTextField = new JTextField( 10 );
balanceTextField.setEditable( false );
interestEarnedTextField = new JTextField( 10 );
interestEarnedTextField.setEditable( false );
// layout components for GUI
layoutGUI();
// add WindowListener to remove EJB instances when user
// closes window
addWindowListener( getWindowListener() );
setSize( 425, 200 );
setVisible( true );
} // end InterestCalculatorClient constructor
// create InterestCalculator EJB instance
public void createInterestCalculator()
{
// lookup InterestCalculatorHome and create
// InterestCalculator EJB
try {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY,"org.jnp.interfaces.NamingContextFactory");
env.put(Context.PROVIDER_URL, "127.0.0.1:1099");
InitialContext initialContext = new InitialContext(env);
// lookup InterestCalculator EJB
Object homeObject =
initialContext.lookup( "InterestCalculator" );
// get InterestCalculatorHome interface
InterestCalculatorHome calculatorHome =
( InterestCalculatorHome )
PortableRemoteObject.narrow( homeObject,
InterestCalculatorHome.class );
// create InterestCalculator EJB instance
calculator = calculatorHome.create();
} // end try
// handle exception if InterestCalculator EJB not found
catch ( NamingException namingException ) {
namingException.printStackTrace();
}
// handle exception when creating InterestCalculator EJB
catch ( RemoteException remoteException ) {
remoteException.printStackTrace();
}
// handle exception when creating InterestCalculator EJB
catch ( CreateException createException ) {
createException.printStackTrace();
}
} // end method createInterestCalculator
// create JTextField for entering principal amount
public void createPrincipalTextField()
{
principalTextField = new JTextField( 10 );
principalTextField.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
{
// set principal amount in InterestCalculator
try {
double principal = Double.parseDouble(
principalTextField.getText() );
calculator.setPrincipal( principal );
}
// handle exception setting principal amount
catch ( RemoteException remoteException ) {
remoteException.printStackTrace();
}
// handle wrong number format
catch ( NumberFormatException
numberFormatException ) {
numberFormatException.printStackTrace();
}
}
}
); // end addActionListener
} // end method createPrincipalTextField
// create JTextField for entering interest rate
public void createRateTextField()
{
rateTextField = new JTextField( 10 );
rateTextField.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
{
// set interest rate in InterestCalculator
try {
double rate = Double.parseDouble(
rateTextField.getText() );
// convert from percentage
calculator.setInterestRate( rate / 100.0 );
}
// handle exception when setting interest rate
catch ( RemoteException remoteException ) {
remoteException.printStackTrace();
}
}
}
); // end addActionListener
} // end method createRateTextField
// create JTextField for entering loan term
public void createTermTextField()
{
termTextField = new JTextField( 10 );
termTextField.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
{
// set loan term in InterestCalculator
try {
int term = Integer.parseInt(
termTextField.getText() );
calculator.setTerm( term );
}
// handle exception when setting loan term
catch ( RemoteException remoteException ) {
remoteException.printStackTrace();
}
}
}
); // end addActionListener
} // end method getTermTextField
// get JButton for starting calculation
public JButton getCalculateButton()
{
JButton calculateButton = new JButton( "Calculate" );
calculateButton.addActionListener(
new ActionListener() {
public void actionPerformed( ActionEvent event )
{
// use InterestCalculator to calculate interest
try {
// get balance and interest earned
double balance = calculator.getBalance();
double interest =
calculator.getInterestEarned();
NumberFormat dollarFormatter =
NumberFormat.getCurrencyInstance(
Locale.US );
balanceTextField.setText(
dollarFormatter.format( balance ) );
interestEarnedTextField.setText(
dollarFormatter.format( interest ) );
}
// handle exception when calculating interest
catch ( RemoteException remoteException ) {
remoteException.printStackTrace();
}
} // end method actionPerformed
}
); // end addActionListener
return calculateButton;
} // end method getCalculateButton
// lay out GUI components in JFrame
public void layoutGUI()
{
Container contentPane = getContentPane();
// layout user interface components
JPanel inputPanel = new JPanel( new GridLayout( 5, 2 ) );
inputPanel.add( new JLabel( "Principal" ) );
inputPanel.add( principalTextField );
inputPanel.add( new JLabel( "Interest Rate (%)" ) );
inputPanel.add( rateTextField );
inputPanel.add( new JLabel( "Term (years)" ) );
inputPanel.add( termTextField );
inputPanel.add( new JLabel( "Balance" ) );
inputPanel.add( balanceTextField );
inputPanel.add( new JLabel( "Interest Earned" ) );
inputPanel.add( interestEarnedTextField );
// add inputPanel to contentPane
contentPane.add( inputPanel, BorderLayout.CENTER );
// create JPanel for calculateButton
JPanel controlPanel = new JPanel( new FlowLayout() );
controlPanel.add( getCalculateButton() );
contentPane.add( controlPanel, BorderLayout.SOUTH );
}
// get WindowListener for exiting application
public WindowListener getWindowListener()
{
return new WindowAdapter() {
public void windowClosing( WindowEvent event )
{
// check to see if calculator is null
if ( calculator.equals( null ) ) {
System.exit( -1 );
}
else {
// remove InterestCalculator instance
try {
calculator.remove();
}
// handle exception removing InterestCalculator
catch ( RemoveException removeException ) {
removeException.printStackTrace();
System.exit( -1 );
}
// handle exception removing InterestCalculator
catch ( RemoteException remoteException ) {
remoteException.printStackTrace();
System.exit( -1 );
}
System.exit( 0 );
}
}
};
} // end method getWindowListener
// execute the application
public static void main( String[] args )
{
new InterestCalculatorClient();
}
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 2.0//EN" "<ejb-jar>
<display-name>InterestCalculator</display-name>
<enterprise-beans>
<session>
<display-name>InterestCalculator</display-name>
<ejb-name>InterestCalculator</ejb-name>
<home>ejb.InterestCalculatorHome</home>
<remote>ejb.InterestCalculator</remote>
<ejb-class>ejb.InterestCalculatorBean</ejb-class>
<session-type>Stateless</session-type>
<transaction-type>Bean</transaction-type>
</session>
</enterprise-beans>
</ejb-jar>
Jboss.xml文件現在暫時不需要，因為我們只是測試EJB的運行，而Jboss.xml這個文件是用來配置服務器的一些選項。
jar cvf TestEjb.jar ejb META-INF
再把TestEjb.jar考至Deploy目錄下，Jboss支持熱部署。
運行客戶端，。。。。。。。