聊天室代码.docx

1、聊天室代码import java.applet.*; import java.awt.*; import java.io.*; import .*; import java.awt.event.*; public class ChatClient extends Applet protected boolean loggedIn;/登入状态 protected Frame cp;/聊天室框架 protected static int PORTNUM=7777; /缺省端口号7777 protected int port;/实际端口号 protected Socket sock; protect

2、ed BufferedReader is;/用于从sock读取数据的BufferedReader protected PrintWriter pw;/用于向sock写入数据的PrintWriter protected TextField tf;/用于输入的TextField protected TextArea ta;/用于显示对话的TextArea protected Button lib;/登入按钮 protected Button lob;/登出的按钮 final static String TITLE =Chatroom applet; protected String paintMe

3、ssage;/发表的消息 public ChatParameter Chat; public void init() paintMessage=正在生成聊天窗口; repaint(); cp=new Frame(TITLE); cp.setLayout(new BorderLayout(); String portNum=getParameter(port);/呢个参数勿太明 port=PORTNUM; if (portNum!=null) /书上是portNum=null,十分有问题 port=Integer.parseInt(portNum); /CGI ta=new TextArea(1

4、4,80); ta.setEditable(false);/read only attribute ta.setFont(new Font(Monospaced,Font.PLAIN,11); cp.add(BorderLayout.NORTH,ta); Panel p=new Panel(); Button b; /for login button p.add(lib=new Button(Login); lib.setEnabled(true); lib.requestFocus(); lib.addActionListener(new ActionListener() public vo

5、id actionPerformed(ActionEvent e) login(); lib.setEnabled(false); lob.setEnabled(true); tf.requestFocus();/将键盘输入锁定再右边的文本框中 ); /for logout button p.add(lob=new Button (Logout); lob.setEnabled(false); lob.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) logout(); lib.s

6、etEnabled(true); lob.setEnabled(false); lib.requestFocus(); ); p.add(new Label (输入消息:); tf=new TextField(40); tf.addActionListener(new ActionListener() public void actionPerformed(ActionEvent e) if(loggedIn) /pw.println(Chat.CMD_BCAST+tf.getText();/Chat.CMD.是咩野来? int j=tf.getText().indexOf(:); if(j0

7、) pw.println(Chat.CMD_MESG+tf.getText(); else pw.println(Chat.CMD_BCAST+tf.getText(); tf.setText();/勿使用flush()? ); p.add(tf); cp.add(BorderLayout.SOUTH,p); cp.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) /如果执行了setVisible或者dispose,关闭窗口 ChatClient.this.cp.setVisible(f

8、alse); ChatClient.this.cp.dispose(); logout(); ); cp.pack();/勿明白有咩用? /将Frame cp放在中间 Dimension us=cp.getSize(), them=Toolkit.getDefaultToolkit().getScreenSize(); int newX=(them.width-us.width)/2; int newY=(them.height-us.height)/2; cp.setLocation(newX,newY); cp.setVisible(true); paintMessage=Window s

9、hould now be visible; repaint(); /登录聊天室 public void login() if(loggedIn) return; try sock=new Socket(getCodeBase().getHost(),port); is=new BufferedReader(new InputStreamReader(sock.getInputStream(); pw=new PrintWriter(sock.getOutputStream(),true); catch(IOException e) showStatus(Cant get socket: +e)

10、; cp.add(new Label(Cant get socket: +e); return; /构造并且启动读入器,从服务器读取数据,输出到文本框中 /这里,长成一个线程来避免锁住资源(lockups) new Thread (new Runnable() public void run() String line; try while(loggedIn &(line=is.readLine()!=null) ta.appendText(line+n); catch(IOException e) showStatus(我的天啊,掉线了也!); return; ).start(); /假定登

11、录(其实只是打印相关信息,并没有真正登录) / pw.println(Chat.CMD_LOGIN+AppletUser); pw.println(Chat.CMD_LOGIN+AppletUser); loggedIn =true; /模仿退出的代码 public void logout() if(!loggedIn) return; loggedIn=false; try if(sock!=null) sock.close(); catch(IOException ign) / 异常处理哦 /没有设置stop的方法,即使从浏览器跳到另外一个网页的时候 /聊天程序还可以继续运行 public

12、 void paint(Graphics g) Dimension d=getSize(); int h=d.height; int w=d.width; g.fillRect(0,0,w,2); g.setColor(Color.black); g.drawString(paintMessage,10,(h/2)-5); 聊天室服务器端 import .*; import java.io.*; import java.util.*; public class ChatServer /聊天室管理员ID protected final static String CHATMASTER_ID=Ch

13、atMaster; /系统信息的分隔符 protected final static String SEP=: ; /服务器的Socket protected ServerSocket servSock; /当前客户端列表 protected ArrayList clients; /调试标记 protected boolean DEBUG=false; public ChatParameter Chat; /主方法构造一个ChatServer,没有返回值 public static void main(String argv) System.out.println(Chat server0.1

14、 starting); ChatServer w=new ChatServer(); w.runServer(); System.out.println(*ERROR* Chat server0.1 quitting); /构造和运行一个聊天服务 ChatServer() Chat=new ChatParameter(); clients=new ArrayList(); try servSock=new ServerSocket(7777);/实有问题拉,不过可能是他自己定义既一个class. System.out.println(Chat Server0.1 listening on po

15、rt:+7777); catch(Exception e) log(IO Exception in ChatServer.); System.exit(0); public void runServer() try while(true) Socket us=servSock.accept(); String hostName=us.getInetAddress().getHostName(); System.out.println(Accpeted from +hostName); /一个处理的线程 ChatHandler cl=new ChatHandler(us,hostName); s

16、ynchronized(clients) clients.add(cl); cl.start(); if(clients.size()=1) cl.send(CHATMASTER_ID,Welcome!You are the first one here); else cl.send(CHATMASTER_ID,Welcome!You are the latest of+ clients.size()+ users.); catch(Exception e) log(IO Exception in runServer:+e); System.exit(0); protected void lo

17、g(String s) System.out.println(s); /处理会话的内部的类 protected class ChatHandler extends Thread /客户端scoket protected Socket clientSock; /读取socket的BufferedReader protected BufferedReader is ; /在socket 上发送信息行的PrintWriter protected PrintWriter pw; /客户端出主机 protected String clientIP; /句柄 protected String login;

18、 public ChatHandler (Socket sock,String clnt)throws IOException clientSock=sock; clientIP=clnt; is=new BufferedReader( new InputStreamReader(sock.getInputStream(); pw=new PrintWriter (sock.getOutputStream(),true); /每一个ChatHandler是一个线程,下面的是他的run()方法 /用于处理会话 public void run() String line; try while(li

19、ne=is.readLine()!=null) char c=line.charAt(0);/我顶你老母啊 ,果只Chat.CMD咩xx冇定义 扑啊/! line=line.substring(1); switch(c) /case Chat.CMD_LOGIN: case l: if(!Chat.isValidLoginName(line) send(CHATMASTER_ID,LOGIN+line+invalid); log(LOGIN INVALID from:+clientIP); continue; login=line; broadcast(CHATMASTER_ID,login+

20、 joins us,for a total of+ clients.size()+ users); break; / case Chat.CMD_MESG: case m: if(login=null) send(CHATMASTER_ID,please login first); continue; int where =line.indexOf(Chat.SEPARATOR); String recip=line.substring(0,where); String mesg=line.substring (where+1); log(MESG: +login+-+recip+: +mes

21、g); ChatHandler cl=lookup(recip); if(cl=null) psend(CHATMASTER_ID,recip+not logged in.); else cl.psend(login,mesg); break; /case Chat.CMD_QUIT: case q: broadcast(CHATMASTER_ID,Goodbye to +login+clientIP); close(); return;/ChatHandler结束 / case Chat.CMD_BCAST: case b: if(login!=null) broadcast(login,l

22、ine); else log(B); else if(clients.size()=1) ChatHandler last=(ChatHandler)clients.get(0); last.send(CHATMASTER_ID,Hey,you are talking to yourself again); else broadcast(CHATMASTER_ID,There are now+clients.size()+ users); protected void close() if(clientSock=null) log(close when not open); return; t

23、ry clientSock.close(); clientSock=null; catch(IOException e) log(Failure during close to +clientIP); /发送一条消息给用户 public void send(String sender,String mesg) pw.println(sender+SEP+*+mesg); /发送私有的消息 protected void psend(String sender ,String msg) send(,msg); /发送一条消息给所有的用户 public void broadcast (String

24、sender,String mesg) System.out.println(Broadcasting+sender+SEP+mesg); for(int i=0;iclients.size();i+) ChatHandler sib=(ChatHandler)clients.get(i); if(DEBUG) System.out.println(Sending to+sib); sib.send(sender,mesg); if(DEBUG) System.out.println(Done broadcast); protected ChatHandler lookup(String ni

25、ck) synchronized(clients) for(int i=0;iclients.size();i+) ChatHandler cl=(ChatHandler)clients.get(i); if(cl.login.equals(nick) return cl; return null; /将ChatHandler对象转换成一个字符串 public String toString() return ChatHandler+login+; public class ChatParameter public static final char CMD_BCAST=b; public s

26、tatic final char CMD_LOGIN=l; public static final char CMD_MESG=m; public static final char CMD_QUIT=q; public static final char SEPARATOR=:;/? public static final int PORTNUM=7777; public boolean isValidLoginName(String line) if (line.equals(CHATMASTER_ID) return false; return true; public void mai

27、n(String argv) !import java.awt.*; import .*; import java.awt.event.*; import java.io.*; import java.util.Hashtable; public class ChatArea extends Panel implements ActionListener,Runnable Socket socket=null; DataInputStream in=null; DataOutputStream out=null; Thread threadMessage=null; TextArea 谈话显示区,私聊显示区=null; TextField 送出信息=null; Button 确定,刷新谈话区,刷新私聊区; Label 提示条=null; String name=null; Hashtable listTable; List listComponent=null; Choice privateChatLi