我正在使用 RMI 创建一个简单的聊天应用程序，但我无法识别出确切的问题在哪里？这是我的代码：
聊天服务器.java
import java.awt.Point;
import java.net.MalformedURLException;
import java.rmi.AlreadyBoundException;
import java.rmi.Naming;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author nick
*/
public class ChatServer extends UnicastRemoteObject implements IChat{
ArrayList<Point> list = new ArrayList<Point>();
public ChatServer() throws RemoteException{
try {
Naming.bind("//localhost:1099/chat", this);
} catch (Exception ex) {
ex.printStackTrace();
}
System.out.println("Chat Server Ready");
}
public void put(Point p) throws RemoteException{
p.getX();
p.getY();
}
/*
public ArrayList<Point> get() throws RemoteException{
return list;
} */
public ArrayList<String> get() throws RemoteException
{
return list;
}
public static void main(String[] args) {
try {
new ChatServer();
} catch (RemoteException ex) {
Logger.getLogger(ChatServer.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
聊天客户端.java
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.rmi.Naming;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFrame;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author nick
*/
public class ChatClient extends JFrame implements Runnable, ActionListener, MouseListener, MouseMotionListener {
String TAG = "kushal ";
IChat ic;
int oldx, oldy;
JTextField jtf;
JTextArea jta;
public ChatClient() {
try {
Remote remote = Naming.lookup("//localhost:1099/chat");
ic = (IChat) remote;
} catch (Exception ex) {
ex.printStackTrace();
}
setSize(300, 300);
setVisible(true);
Thread t = new Thread(this);
t.start();
}
public void paint(Graphics g) {
}
public void run() {
while (true) {
try {
ArrayList<Point> list = ic.get();
Thread.sleep(1000);
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
public static void main(String[] args) {
new ChatClient();
}
public void actionPerformed(ActionEvent e) {
/* try {
ic.put(TAG + jtf.getText());
jtf.setText("");
} catch (RemoteException ex) {
Logger.getLogger(ChatClient.class.getName()).log(Level.SEVERE, null, ex);
}*/
}
public void mouseClicked(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
oldx = e.getX();
oldy = e.getY();
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void mouseDragged(MouseEvent e) {
Graphics g = getGraphics();
int x = e.getX();
int y = e.getY();
g.drawLine(oldx, oldy, x, y);
oldx = x;
oldy = y;
}
public void mouseMoved(MouseEvent e) {
}
}
IChat.java
import java.awt.Point;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.util.ArrayList;
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/**
*
* @author new
*/
public interface IChat extends Remote{
public void put(Point p) throws RemoteException;
public ArrayList<Point> get() throws RemoteException;
}
Netbeans 日志中的错误
run:
java.rmi.ConnectException: Connection refused to host: localhost; nested exception is:
Chat Server Ready
java.net.ConnectException: Connection refused: connect
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619)
at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216)
at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202)
at sun.rmi.server.UnicastRef.newCall(UnicastRef.java:340)
at sun.rmi.registry.RegistryImpl_Stub.bind(Unknown Source)
at java.rmi.Naming.bind(Naming.java:128)
at ChatServer.<init>(ChatServer.java:26)
at ChatServer.main(ChatServer.java:58)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:69)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:337)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:198)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at java.net.Socket.connect(Socket.java:528)
at java.net.Socket.<init>(Socket.java:425)
at java.net.Socket.<init>(Socket.java:208)
at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40)
at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:146)
at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613)
... 7 more
任何帮助都会非常有用。
提前致谢。