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;

ListsocketList;

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 ListsocketList;

public listening(Socket socket, ListsocketList) {

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();

}

}