java基于线程的socket的简单聊天室案例

服务端：

package com.swing;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.Iterator;

public class VerySimpleChatServer {
	ArrayList clientOutputStream;
	public class ClientHandle implements Runnable{
		BufferedReader reader;
		Socket sock;
		public ClientHandle(Socket clientSocket){
			try {
				sock = clientSocket;
				InputStreamReader isReader;
				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){
					System.out.println("read" + message);
					tellEveryone(message);
				}
			} catch (Exception e) {
				e.printStackTrace();
			}			
		}		
	}
	public static void main(String[] args) {
		new VerySimpleChatServer().go();
	}
	public void go(){
		clientOutputStream = new ArrayList();
		try {
			ServerSocket serverSocket = new ServerSocket(5000);
			while(true){
				Socket clientSocket = serverSocket.accept();
				PrintWriter writer = new PrintWriter(clientSocket.getOutputStream());
				clientOutputStream.add(writer);
				
				Thread t = new Thread(new ClientHandle(clientSocket));
				t.start();
				System.out.println("got a connection");
			}			
		} catch (Exception e) {
			e.printStackTrace();
		}		
	}
	
	public void tellEveryone(String message){
		Iterator it = clientOutputStream.iterator();
		while(it.hasNext()){
			PrintWriter writer = (PrintWriter) it.next();
			writer.println(message);
			writer.flush();
		}
	}
	
	
	
	
}

客户端：

package com.swing;

import java.awt.BorderLayout;
import java.awt.event.*;
import java.io.*;
import java.net.*;

import javax.swing.*;




public class SimpleChatClientA {
	JTextArea incoming;
	JTextField outgoing;
	PrintWriter writer;
	Socket sock;
	BufferedReader reader;
	
	public void go(){
		JFrame frame = new JFrame("Ludicrously Simple Chat Client");
		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(outgoing);
		mainPanel.add(sendButton);
		mainPanel.add(qScroller);
		setUpNetworking();
		
		Thread readerThread = new Thread(new IncomingReader());
		readerThread.start();
		
		frame.getContentPane().add(BorderLayout.CENTER, mainPanel);
		frame.setSize(400, 500);
		frame.setVisible(true);
	}
	private void setUpNetworking(){
		try {
			sock = new Socket("127.0.0.1",5000);
			InputStreamReader streamReader = new InputStreamReader(sock.getInputStream());
			reader = new BufferedReader(streamReader);
			writer = new PrintWriter(sock.getOutputStream());
			System.out.println("networking established");
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	public class SendButtonListener implements ActionListener{

		public void actionPerformed(ActionEvent e) {
			writer.println(outgoing.getText());
			writer.flush();			
			outgoing.setText("");
			outgoing.requestFocus();
		}		
	}
	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");
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		
		
	}
	
	
	public static void main(String[] args) {
		new SimpleChatClientA().go();
	}
	
	
}

结果：