java利用Socket实现聊天室功能实例

最近研究了下Java socket通信基础，利用代码实现了一个简单的多人聊天室功能，现把代码共享下，希望能帮到有兴趣了解的人。

目录结构：

ChatClient:

package com.panda.chat; 

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

@SuppressWarnings("serial")
public class ChatClient extends Frame {
 private TextArea ta = new TextArea();
 private TextField tf = new TextField();
 private DataOutputStream dos = null;
 private DataInputStream dis = null;
 private Socket socket = null;
 private boolean bConnected = false;
 private Thread thread=null;
 public static void main(String[] args) {
  new ChatClient().frameClient();
 }
 public void frameClient(){
  setSize(400, 400);
  setLocation(400,300);
  add(ta,BorderLayout.NORTH);
  add(tf,BorderLayout.SOUTH);
  pack();
  tf.addActionListener(new TfListener());
  //关闭窗口事件监听
  this.addWindowListener(new WindowAdapter() {
   @Override
   public void windowClosing(WindowEvent e) {
    disconnected();
    System.exit(0);
   }
  });
  this.connect();
  setVisible(true);
 }
 //链接服务器地址
 private void connect(){
  try {
   socket = new Socket("127.0.0.1", 8888);
   thread=new Thread(new ChatThread());
   thread.start();
   dos = new DataOutputStream(socket.getOutputStream());
   dis = new DataInputStream(socket.getInputStream());
  } catch (UnknownHostException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
 //断开连接
 private void disconnected(){
  bConnected = false;
  try {
   dos.close();
   dis.close();
   socket.close();
  } catch (IOException e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  }
 }
 //键盘回车事件
 private class TfListener implements ActionListener{ 

  @Override
  public void actionPerformed(ActionEvent e) {
   String strMsg = tf.getText();
   tf.setText("");
   try {
    dos.writeUTF(strMsg);
    dos.flush();
   } catch (IOException e1) {
    // TODO Auto-generated catch block
    e1.printStackTrace();
   }
  } 

 }
 //开启线程接受服务器信息
 private class ChatThread implements Runnable{
  @Override
  public void run() {
   try {
    bConnected = true;
    while(bConnected){
     String msg = dis.readUTF();
     String taText = ta.getText();
     ta.setText(taText+msg+"\n");
    }
   } catch (SocketException e) {
    System.out.println("退出");;
   } catch (IOException e) {
    e.printStackTrace();
   }
  }
 }
}

ChatServer:

package com.panda.chat; 

import java.io.*;
import java.net.*;
import java.util.*; 

public class ChatServer {
 private boolean started = false;
 private List<ChatThread> chatThreads = new ArrayList<ChatThread>();
 public static void main(String[] args) {
  new ChatServer().startServer();
 }
 private void startServer(){
  try {
   //开启服务端Socket
   ServerSocket seso = new ServerSocket(8888);
   started = true;
   while(started){
    //接受客户端连接请求
    Socket sos = seso.accept();
    System.out.println("一个客户端已连接");
    //开启线程处理客户端通信
    ChatThread ct = new ChatThread(sos);
    chatThreads.add(ct);
    new Thread(ct).start();
   }
  } catch (IOException e) {
   e.printStackTrace();
  }
 }
 private class ChatThread implements Runnable{
  private Socket socket;
  private DataInputStream din=null;
  private DataOutputStream don=null;
  private boolean bConnected = false;
  public ChatThread(Socket socket) {
   super();
   this.socket = socket;
  }
  //发送信息的函数
  private void send(String strMsgIn){
   try{
    don.writeUTF(strMsgIn);
    don.flush();
   }catch(IOException e){
    e.printStackTrace();
   }
  }
  @Override
  public void run() {
   try{
    din = new DataInputStream(socket.getInputStream());
    don = new DataOutputStream(socket.getOutputStream());
    //读取数据
    bConnected = true;
    while(bConnected){
     String strMsgIn = din.readUTF();
     System.out.println(strMsgIn);
     //接收到数据后发送给每个客户端
     for(int i =0;i<chatThreads.size();i++){
      chatThreads.get(i).send(strMsgIn);
     }
    }
   }catch (IOException e) {
    try {
     //如果客户端出错或关闭，直接关闭连接，并移除List中的当前线程
     socket.close();
     chatThreads.remove(this);
    } catch (IOException e1) {
     // TODO Auto-generated catch block
     e1.printStackTrace();
    }
   } finally{
    try {
     din.close();
     don.close();
     socket.close();
    } catch (IOException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }
  } 

 }
}

运行ChatSever后，再同时打开多次ChatClient，就可以实现多人聊天了，你也试试。

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