JavaSocket实现多人聊天室

Java Socket实现多人聊天室---swing做UI

标签：socket聊天javaexception服务器string

2011-08-31 15:0620679人阅读评论(25)收藏举报分类：

java（21）

声明：本文为博主原创文章，未经博主允许不得。

今天翻硬盘的workspace发现一个Java Socket实现多人聊天室的源码，不记得是什么时候的事情了，貌似不是我写的。但写得还不错，

至少算个有模有样的聊天室工具。我简单的修改了一下，拿出来跟大家分享一下，仅供参考。。。

界面是用swing写的，还不懒，简约大方。有图有真相：

正如上图所示，这个程序分为服务器端和客户端，说白了就是两个main class，用eclipse 直接运行之。。。。。

聊天室的设计思想是：在局域网下，利用socket进行连接通信，当服务器端启动的时候，利用Thread线程不停的等待客户端的；当有客户端开启连

接的时候，服务器端通过IO流反馈“上线用户”信息给客户端，客户端也使用线程不停的接收服务器的信息，从而实现多人在线聊天功能。

程序中有三个类，分别Server.java（服务器端）、Client（客户端）、User.java（javabean）。代码如下：

Server.java（服务器端）：

[html]view plaincopy

1.import java.awt.BorderLayout;

2.import java.awt.Color;

3.import java.awt.GridLayout;

4.import java.awt.Toolkit;

5.import java.awt.event.ActionEvent;

6.import java.awt.event.ActionListener;

7.import java.awt.event.WindowAdapter;

8.import java.awt.event.WindowEvent;

9.import java.io.BufferedReader;

10.import java.io.IOException;

11.import java.io.InputStreamReader;

12.import java.io.PrintWriter;

13.import https://www.360docs.net/doc/5e15028278.html,.BindException;

14.import https://www.360docs.net/doc/5e15028278.html,.ServerSocket;

15.import https://www.360docs.net/doc/5e15028278.html,.Socket;

16.import java.util.ArrayList;

17.import java.util.StringTokenizer;

18.

19.import javax.swing.DefaultListModel;

20.import javax.swing.JButton;

21.import javax.swing.JFrame;

22.import javax.swing.JLabel;

23.import javax.swing.JList;

24.import javax.swing.JOptionPane;

25.import javax.swing.JPanel;

26.import javax.swing.JScrollPane;

27.import javax.swing.JSplitPane;

28.import javax.swing.JTextArea;

29.import javax.swing.JTextField;

30.import javax.swing.border.TitledBorder;

31.

32.public class Server{

33.

34.private JFrame frame;

35.private JTextArea contentArea;

36.private JTextField txt_message;

37.private JTextField txt_max;

38.private JTextField txt_port;

39.private JButton btn_start;

40.private JButton btn_stop;

41.private JButton btn_send;

42.private JPanel northPanel;

43.private JPanel southPanel;

44.private JScrollPane rightPanel;

45.private JScrollPane leftPanel;

46.private JSplitPane centerSplit;

47.private JList userList;

48.private DefaultListModel listModel;

49.

50.private ServerSocket serverSocket;

51.private ServerThread serverThread;

52.private ArrayListclients;

53.

54.private boolean isStart=false;

55.

56.//主方法,程序执行入口

57.public static void main(String[]args){

58.new Server();

59.}

60.

61.//执行消息发送

62.public void send(){

63.if(!isStart){

64.JOptionPane.showMessageDialog(frame,"服务器还未启动,不能发送消

息！","错误",

65.JOptionPane.ERROR_MESSAGE);

66.return;

67.}

68.if(clients.size()==0){

69.JOptionPane.showMessageDialog(frame,"没有用户在线,不能发送消

息！","错误",

70.JOptionPane.ERROR_MESSAGE);

71.return;

72.}

73.String message=txt_message.getText().trim();

74.if(message==null||message.equals("")){

75.JOptionPane.showMessageDialog(frame,"消息不能为空！","错误",

76.JOptionPane.ERROR_MESSAGE);

77.return;

78.}

79.sendServerMessage(message);//群发服务器消息

80.contentArea.append("服务器说："+txt_message.getText()+"\r\n");

81.txt_message.setText(null);

82.}

83.

84.//构造放法

85.public Server(){

86.frame=new JFrame("服务器");

87.//更改JFrame的图标：

88.//frame.setIconImage(Toolkit.getDefaultToolkit().createImage(Client.class.

getResource("qq.png")));

89.frame.setIconImage(Toolkit.getDefaultToolkit().createImage(Server.class.g

etResource("qq.png")));

90.contentArea=new JTextArea();

91.contentArea.setEditable(false);

92.contentArea.setForeground(Color.blue);

93.txt_message=new JTextField();

94.txt_max=new JTextField("30");

95.txt_port=new JTextField("6666");

96.btn_start=new JButton("启动");

97.btn_stop=new JButton("停止");

98.btn_send=new JButton("发送");

99.btn_stop.setEnabled(false);

100.listModel=new DefaultListModel();

https://www.360docs.net/doc/5e15028278.html,erList=new JList(listModel);

102.

103.southPanel=new JPanel(new BorderLayout());

104.southPanel.setBorder(new TitledBorder("写消息"));

105.southPanel.add(txt_message,"Center");

106.southPanel.add(btn_send,"East");

107.leftPanel=new JScrollPane(userList);

108.leftPanel.setBorder(new TitledBorder("在线用户"));

109.

110.rightPanel=new JScrollPane(contentArea);

111.rightPanel.setBorder(new TitledBorder("消息显示区"));

112.

113.centerSplit=new JSplitPane(JSplitPane.HORIZONTAL_SPLIT,leftPanel, 114.rightPanel);

115.centerSplit.setDividerLocation(100);

116.northPanel=new JPanel();

117.northPanel.setLayout(new GridLayout(1,6));

118.northPanel.add(new JLabel("人数上限"));

119.northPanel.add(txt_max);

120.northPanel.add(new JLabel("端口"));

121.northPanel.add(txt_port);

122.northPanel.add(btn_start);

123.northPanel.add(btn_stop);

124.northPanel.setBorder(new TitledBorder("配置信息"));

125.

126.frame.setLayout(new BorderLayout());

127.frame.add(northPanel,"North");

128.frame.add(centerSplit,"Center");

129.frame.add(southPanel,"South");

130.frame.setSize(600,400);

131.//frame.setSize(Toolkit.getDefaultToolkit().getScreenSize());//设置全屏132.int screen_width=Toolkit.getDefaultToolkit().getScreenSize().width; 133.int screen_height=Toolkit.getDefaultToolkit().getScreenSize().height;

134.frame.setLocation((screen_width-frame.getWidth())/2,

135.(screen_height-frame.getHeight())/2);

136.frame.setVisible(true);

137.

138.//关闭窗口时事件

139.frame.addWindowListener(new WindowAdapter(){

140.public void windowClosing(WindowEvent e){

141.if(isStart){

142.closeServer();//关闭服务器

143.}

144.System.exit(0);//退出程序

145.}

146.});

147.

148.//文本框按回车键时事件

149.txt_message.addActionListener(new ActionListener(){

150.public void actionPerformed(ActionEvent e){

151.send();

152.}

153.});

154.

155.//单击发送按钮时事件

156.btn_send.addActionListener(new ActionListener(){

157.public void actionPerformed(ActionEvent arg0){

158.send();

159.}

160.});

161.

162.//单击启动服务器按钮时事件

163.btn_start.addActionListener(new ActionListener(){

164.public void actionPerformed(ActionEvent e){

165.if(isStart){

166.JOptionPane.showMessageDialog(frame,"服务器已处于启动状态，不要重复启动！",

167."错误",JOptionPane.ERROR_MESSAGE);

168.return;

169.}

170.int max;

171.int port;

172.try{

173.try{

174.max=Integer.parseInt(txt_max.getText());

175.}catch(Exception e1){

176.throw new Exception("人数上限为正整数！");

177.}

178.if(max<=0){

179.throw new Exception("人数上限为正整数！");

180.}

181.try{

182.port=Integer.parseInt(txt_port.getText());

183.}catch(Exception e1){

184.throw new Exception("端口号为正整数！");

185.}

186.if(port<=0){

187.throw new Exception("端口号为正整数！");

188.}

189.serverStart(max,port);

190.contentArea.append("服务器已成功启动!人数上限："+max+",端口："+port

191.+"\r\n");

192.JOptionPane.showMessageDialog(frame,"服务器成功启动!"); 193.btn_start.setEnabled(false);

194.txt_max.setEnabled(false);

195.txt_port.setEnabled(false);

196.btn_stop.setEnabled(true);

197.}catch(Exception exc){

198.JOptionPane.showMessageDialog(frame,exc.getMessage(), 199."错误",JOptionPane.ERROR_MESSAGE);

200.}

201.}

202.});

203.

204.//单击停止服务器按钮时事件

205.btn_stop.addActionListener(new ActionListener(){

206.public void actionPerformed(ActionEvent e){

207.if(!isStart){

208.JOptionPane.showMessageDialog(frame,"服务器还未启动，无需停止！","错误",

209.JOptionPane.ERROR_MESSAGE);

210.return;

211.}

212.try{

213.closeServer();

214.btn_start.setEnabled(true);

215.txt_max.setEnabled(true);

216.txt_port.setEnabled(true);

217.btn_stop.setEnabled(false);

218.contentArea.append("服务器成功停止!\r\n");

219.JOptionPane.showMessageDialog(frame,"服务器成功停止！"); 220.}catch(Exception exc){

221.JOptionPane.showMessageDialog(frame,"停止服务器发生异常！

","错误",

222.JOptionPane.ERROR_MESSAGE);

223.}

224.}

225.});

226.}

227.

228.//启动服务器

229.public void serverStart(int max,int port)throws https://www.360docs.net/doc/5e15028278.html,.BindException{ 230.try{

231.clients=new ArrayList();

232.serverSocket=new ServerSocket(port);

233.serverThread=new ServerThread(serverSocket,max);

234.serverThread.start();

235.isStart=true;

236.}catch(BindException e){

237.isStart=false;

238.throw new BindException("端口号已被占用，请换一个！");

239.}catch(Exception e1){

240.e1.printStackTrace();

241.isStart=false;

242.throw new BindException("启动服务器异常！");

243.}

244.}

245.

246.//关闭服务器

247.SuppressWarnings("deprecation")

248.public void closeServer(){

249.try{

250.if(serverThread!=null)

251.serverThread.stop();//停止服务器线程

252.

253.for(int i=clients.size()-1;i>=0;i--){

254.//给所有在线用户发送关闭命令

255.clients.get(i).getWriter().println("CLOSE");

256.clients.get(i).getWriter().flush();

257.//释放资源

258.clients.get(i).stop();//停止此条为客户端服务的线程

259.clients.get(i).reader.close();

260.clients.get(i).writer.close();

261.clients.get(i).socket.close();