Java实现通过服务器实现客户端之间的简单群聊

描述：

使用了socket编程。主要是通过服务器监听端口，对于新访问的客户端建立一个socket长连接。每次客户端输入信息，先传到服务器，再由服务发给在线的客户端。

其功能模型如下：

运行截图：

1、需要先启动服务器端，界面如下：

2、启动2或2个以上个客户端（名字随机）：

3、聊天结果：

代码部分：

服务器端代码实现：

package pack2;

import java.net.*;
import java.util.ArrayList;
import java.util.List;
import java.awt.Container;
import java.io.*;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;




public class chatServer extends JFrame{
	/**
	 * 
	 */
	private static final long serialVersionUID = -4929211394401993088L;

	static JTextArea textArea;
	List socketList;
	ServerSocket serverSocket;
	Socket socket = null;

	
	public chatServer()throws IOException{
		this.setTitle("Server");
		init();
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLayout(null);      
        this.setBounds(0, 0, 300, 510);
        this.setResizable(false);
        this.setLocation(710,200);
        this.setVisible(true);	
        System.out.println("Sever started!!!");
        serverSocket = new ServerSocket(2345);
        socketList  = new ArrayList();
        socket = null;
        while (true) {
			socket = serverSocket.accept();
			System.out.println("Clinet connected to the server!");
			socketList.add(socket);
			new listening(socket, socketList).start();
		}
        
	}	
	void init(){
		Container con = this.getContentPane();
		
		textArea=new JTextArea();
		textArea.setBounds(5, 5, 285,440);
		textArea.setEditable(false);
		con.add(textArea);		
		JScrollPane scrollPane = new JScrollPane(textArea);
		scrollPane.setBorder(null);		
		scrollPane.setBounds(5, 5, 285,440);		
		con.add(scrollPane);
	}

	public static void  main(String[] args) throws IOException{
		new chatServer();
	}

}



class listening extends Thread{
	private Socket socket;
	private List socketList;
	
	public listening(Socket socket, List socketList) {
		this.socket = socket;
		this.socketList = socketList;
	}
    @Override
    public void run() {
    	DataInputStream in;
    	DataOutputStream out;
    	try {
    		in=new DataInputStream(socket.getInputStream());
    		String news;
    		while(true){
    			news = in.readUTF();
    			chatServer.textArea.append(news+"\n");
    			for(int i=0;i

客户端代码实现：

package pack2;

import java.net.*;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.io.*;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;


public class chatClient extends JFrame implements Runnable,ActionListener{
	/**
	 * 
	 */
	private static final long serialVersionUID = -7103711638195532808L;

	DataInputStream in;
	DataOutputStream out;
	Socket socket;
	String name,ipAdress;
	JTextField textField;
	JTextArea textArea;
	JButton button;
	
	
	public chatClient(String name){
		this.name=name;
		//this.ipAdress=ipAdress;
		this.setTitle("我是 "+name);
		init();
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        this.setLayout(null);      
        this.setBounds(0, 0, 300, 510);
        this.setResizable(false);
        this.setLocation(400, 200);
        this.setVisible(true);	
        try {
        	socket=new Socket(this.ipAdress,2345);
    		in=new DataInputStream(socket.getInputStream());
    		out=new DataOutputStream(socket.getOutputStream());
		} catch (IOException e) {}
	}
	@Override
	public void run() {
		try{
         while(true){
    		textArea.append(in.readUTF()+"\n");
         }
    	}catch(Exception e){}
	}
	
	void init(){
		Container con = this.getContentPane();
		button=new JButton("Send");
		button.setBounds(225,450,65,20);
		button.addActionListener(this);
		
		con.add(button);
		
		textField=new JTextField();
		textField.setBounds(5,450,215,20);
		textField.addKeyListener(new KeyAdapter() {
		      public void keyPressed(KeyEvent e) {
		    	 
			        if(e.getKeyCode()==KeyEvent.VK_ENTER){
			        	try {
							out.writeUTF(textField.getText());
							textField.setText("");
						} catch (IOException e2) {}
			        }		        
			      }
			    });
		con.add(textField);
		
		textArea=new JTextArea();
		textArea.setBounds(5, 5, 285,440);
		textArea.setEditable(false);
		JScrollPane scrollPane = new JScrollPane(textArea);
		scrollPane.setBorder(null);		
		scrollPane.setBounds(5, 5, 285,440);		
		con.add(scrollPane);
	}
	@Override
	public void actionPerformed(ActionEvent e) {
		if(e.getSource()==button)
			try {
				out.writeUTF(this.name+": "+textField.getText());
				textField.setText("");
			} catch (IOException e2) {}
			
	}

	public static void main(String[] args) {
		String []name = {"刘一","陈二","张三","李四","王五","赵六","孙七","周八","吴九","郑十"};
		java.util.Random random=new java.util.Random();
		int result=random.nextInt(10);
		new Thread(new chatClient(name[result])).start();
	}

}