我正在尝试开发一个点对点聊天应用程序，允许多个客户端彼此聊天，此时我只能允许用户互相聊天，我的代码设置连接如下。如何更改代码以允许多个连接？
import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
// import all the class that you will need for functionailty
// extends jframe to develop gui's in java
public class Server extends JFrame{
private JTextField userInput; //
private JTextArea theChatWindow; //
private ObjectOutputStream output; // stream data out
private ObjectInputStream input; // stream data in
private ServerSocket server;
private Socket connection; // socket means set up connetion between 2 computers
//Constructor
public Server(){
super("My Chat Service");
userInput = new JTextField();
userInput.setEditable(false); // set this false so you dont send messages when noone is available to chat
// action event listener to check when the user hits enter for example
userInput.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent event){
sendMessage(event.getActionCommand()); // string entered in the textfield
userInput.setText(""); // reset text area to blank again
}
}
);
// create the chat window
add(userInput, BorderLayout.NORTH);
theChatWindow = new JTextArea();
add(new JScrollPane(theChatWindow));
setSize(300,150);
setVisible(true);
}
// run the server after gui created
public void RunServer(){
try{
server = new ServerSocket(6789, 100); // 1st number is port number where the application is located on the server, 2nd number is the amount of people aloud to connect
while(true){
try{
waitForConnection(); // wait for a connection between 2 computers
setupStreams(); // set up a stream connection between 2 computers to communicate
whileChatting(); // send message to each other
// connect with someone and have a conversation
}catch(EOFException eofException){
showMessage("\n Server ended Connection");
}finally{
closeChat();
}
}
}catch(IOException ioException){
ioException.printStackTrace();
}
}
//Wait for a connection then display connection information
private void waitForConnection(){
showMessage("waiting for someone to connect to chat room....\n");
try {
connection = server.accept();
} catch (IOException ioexception) {
ioexception.printStackTrace();
}
showMessage("Now connected to"+ connection.getInetAddress().getHostName());
}
// stream function to send and recive data
private void setupStreams() throws IOException{
output = new ObjectOutputStream(connection.getOutputStream()); // set up pathway to send data out
output.flush(); // move data away from your machine
input = new ObjectInputStream(connection.getInputStream()); // set up pathway to allow data in
showMessage("\n Connection streams are now setup \n");
}
// this code while run during chat conversions
private void whileChatting() throws IOException{
String message = " You are now connected ";
sendMessage(message);
allowTyping(true); // allow user to type when connection
do{
// have conversion while the client does not type end
try{
message = (String) input.readObject(); // stores input object message in a string variable
showMessage("\n " +message);
}catch(ClassNotFoundException classnotfoundException){
showMessage("\n i dont not what the user has sent");
}
}while(!message.equals("CLIENT - END"));// if user types end program stops
}
private void closeChat(){
showMessage("\n closing connections...\n");
allowTyping(true);
try{
output.close(); // close output stream
input.close(); // close input stream
connection.close(); // close the main socket connection
}catch(IOException ioexception){
ioexception.printStackTrace();
}
}
// send message to the client
private void sendMessage(String message){
try{
output.writeObject("Server - "+ message);
output.flush(); // send all data out
showMessage("\nServer - "+ message);
}catch(IOException ioexception){
theChatWindow.append("\n ERROR: Message cant send");
}
}
// update the chat window (GUI)
private void showMessage(final String text){
SwingUtilities.invokeLater(
new Runnable(){
public void run(){
theChatWindow.append(text);
}
}
);
}
// let the user type messages in their chat window
private void allowTyping(final boolean trueOrFalse){
SwingUtilities.invokeLater(
new Runnable(){
public void run(){
userInput.setEditable(trueOrFalse);
}
}
);
}
}
答案 0 :(得分：1)
研究XMPP协议 - 它是聊天协议的事实标准之一，可能为您的项目提供示例或想法。我认为XMPP更适合服务器到多客户端，但它实际上只是一堆来回发送的XML文档。
http://en.wikipedia.org/wiki/XMPP
和一个惊人的开源社区，目前有一个非常好的服务器和客户端遵循XMPP协议标准。他们有一个很棒的社区，所以也许可以跳到那里与一些开发人员讨论设计思路等，或者看看他们的源代码：