所以我的聊天服务器只能连接到端口5000上的客户端。我只能同时向所有人广播信息。
有没有办法向一个人发送消息？就像当天的服务器消息（或者我编码完全错误的方式，我必须进行大修，如果可以，请列出我需要修复的内容？）
这是我的服务器代码：
public class ServerProgram
{
JTextArea incoming;
ArrayList clientOutputStreams;
JTextField outgoing;
public class ClientHandler implements Runnable {
BufferedReader reader;
Socket sock;
public ClientHandler(Socket clientSocket){
try{
sock = clientSocket;
InputStreamReader isReader = new InputStreamReader(sock.getInputStream());
reader = new BufferedReader(isReader);
} catch(Exception e) {e.printStackTrace();}
}
public void run(){
String message;
try{
while ((message=reader.readLine())!=null){
incoming.append("USER: "+message+"\n");
tellEveryone(message);
}
}catch(Exception e){e.printStackTrace();}
}
}
public static void main (String[] args){
new ServerProgram().go();
}
public void go(){
clientOutputStreams = new ArrayList();
JFrame frame = new JFrame("Simple Chat Server");
JPanel mainPanel = new JPanel();
incoming = new JTextArea(15,50);
incoming.setLineWrap(true);
incoming.setWrapStyleWord(true);
incoming.setEditable(false);
JScrollPane qScroller = new JScrollPane(incoming);
qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
outgoing = new JTextField(20);
JButton sendButton = new JButton ("Send");
sendButton.addActionListener(new SendButtonListener());
mainPanel.add(qScroller);
mainPanel.add(outgoing);
mainPanel.add(sendButton);
frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
frame.setSize(600,500);
frame.setVisible(true);
try{
ServerSocket serverSock = new ServerSocket(5000);
while(true){
Socket clientSocket = serverSock.accept();
PrintWriter writer = new PrintWriter(clientSocket.getOutputStream());
clientOutputStreams.add(writer);
Thread t = new Thread(new ClientHandler(clientSocket));
t.start();
incoming.append("got a connection at "+" \n");}
}catch (Exception e){e.printStackTrace();}
}
public void tellEveryone(String message){
Iterator it = clientOutputStreams.iterator();
while(it.hasNext()){
try{
PrintWriter writer = (PrintWriter) it.next();
writer.println(message);
writer.flush();
}catch(Exception e){e.printStackTrace();}
}
}
private class SendButtonListener implements ActionListener{
public void actionPerformed(ActionEvent ev){
Iterator it = clientOutputStreams.iterator();
if(it.hasNext()==false){
incoming.append(outgoing.getText());
}
else{tellEveryone("!SERVER;!"+outgoing.getText());
incoming.append(outgoing.getText()+"\n");}
outgoing.setText("");
outgoing.requestFocus();
}
}
}
这是我的客户代码：
public class ChatClient
{
JTextArea incoming;
JTextField outgoing;
BufferedReader reader;
PrintWriter writer;
Socket sock;
String UserName;
String ipAdd="127.0.0.1";
int FinishedNet=0;
JMenuBar menuBar;
JMenu menu, submenu;
JMenuItem menuItem;
JRadioButtonMenuItem rbMenuItem;
JCheckBoxMenuItem cbMenuItem;
public static void main(String[] args) throws Exception
{ChatClient chat = new ChatClient();
chat.go();}
public void go(){
menuBar = new JMenuBar();
JFrame frame = new JFrame("Simple Chat client");
JPanel mainPanel = new JPanel();
menu = new JMenu("Menu");
menu.getAccessibleContext().setAccessibleDescription(
"The only menu in this program that has menu items");
menuBar.add(menu);
cbMenuItem = new JCheckBoxMenuItem("Message AutoScroll");
cbMenuItem.addActionListener(new autoScrollListener());
menu.add(cbMenuItem);
frame.setJMenuBar(menuBar);
incoming = new JTextArea(15,50);
incoming.setLineWrap(true);
incoming.setWrapStyleWord(true);
incoming.setEditable(false);
JScrollPane qScroller = new JScrollPane(incoming);
qScroller.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
qScroller.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
outgoing = new JTextField(20);
outgoing.addKeyListener(new EnterListener());
JButton sendButton = new JButton ("Send");
sendButton.addActionListener(new SendButtonListener());
mainPanel.add(qScroller);
mainPanel.add(outgoing);
mainPanel.add(sendButton);
setUpNetworking();
Thread readerThread = new Thread(new IncomingReader());
readerThread.start();
frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
frame.setSize(600,500);
frame.setVisible(true);
incoming.setText("Type /Help to get the help Text \n");
}
private void setUpNetworking(){
try{
ipAdd = JOptionPane.showInputDialog("What is the IP you wish to connect to");
UserName = JOptionPane.showInputDialog("What is your UserName?");
sock = new Socket(ipAdd, 5000);
InputStreamReader streamReader = new InputStreamReader(sock.getInputStream());
reader = new BufferedReader(streamReader);
writer = new PrintWriter(sock.getOutputStream());
incoming.append("Networking Finished");
} catch(IOException e){
e.printStackTrace();}
}
public void SendMessage(String message){
writer.println(UserName+": "+message);
writer.flush();
outgoing.setText("");
outgoing.requestFocus();
}
public void SendMessage(){
try{
incoming.setForeground(Color.RED);
String outText=outgoing.getText();
if(outText.length()>1 && outText.substring(0, 1).equals("/")){
String realOutText=outgoing.getText().substring(1);
if(realOutText.equals("help")){
incoming.append("\n help: Displays the help text \n reconnect: reconnects to any IP \n newUserName: Select a new username \n about: Displays the about text \n ipAddress: Displays your public IP Address to only you \n ipAdressAll: Sends your public IP Adress to everyone on the server \n");
}
else if(realOutText.equals("about")){
incoming.append("\n Coded by Dan Janes with the help of Ian Sacco \n Started on 5/27/2014 \n");
}
else if(realOutText.equals("newUserName")){
String old=UserName;
UserName = JOptionPane.showInputDialog("What is your NEW UserName?");
writer.println(old+" is now known as "+UserName);
writer.flush();
}
else if (realOutText.equals("reconnect")){
setUpNetworking();
}
else if (realOutText.equals("ipAddress")){
try{ URL whatismyip = new URL("http://bot.whatismyipaddress.com");
BufferedReader in = new BufferedReader(new InputStreamReader(
whatismyip.openStream()));
String ip = in.readLine();
incoming.append("Your IP address is "+ip+"\n");}
catch(Exception e){e.printStackTrace();
}
}
else if (realOutText.equals("ipAddressAll")){
try{URL whatismyip = new URL("http://bot.whatismyipaddress.com");
BufferedReader in = new BufferedReader(new InputStreamReader(
whatismyip.openStream()));
String ip = in.readLine();
SendMessage( UserName+"'s IP address is "+ip);}
catch(Exception e){e.printStackTrace();
}
}
else{
incoming.append("Sorry that is not a command, try /help \n");
}
}
else{
writer.println(UserName+": "+outText);
writer.flush();
}}catch(Exception e) {e.printStackTrace();}
outgoing.setText("");
outgoing.requestFocus();
}
private class SendButtonListener implements ActionListener{
public void actionPerformed(ActionEvent ev){
SendMessage();
}
}
private class autoScrollListener implements ActionListener{
public void actionPerformed(ActionEvent ev){
if(cbMenuItem.isSelected()==true){
incoming.setCaretPosition(incoming.getDocument().getLength());}
}
}
private class EnterListener implements KeyListener{
@Override
public void keyPressed(KeyEvent arg0) {
if(arg0.getKeyCode()==10){
SendMessage();
}
}
@Override
public void keyReleased(KeyEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent arg0) {
// TODO Auto-generated method stub
}
}
public class IncomingReader implements Runnable{
public void run(){
String message;
try{
while ((message=reader.readLine())!=null){System.out.println("read "+message);
incoming.append(message+"\n");
if(cbMenuItem.isSelected()==true){
incoming.setCaretPosition(incoming.getDocument().getLength());}
}
}catch(Exception e){e.printStackTrace();}
}
}
}