java聊天程序源代码

1、服务端：import java.io.*;import .*;import java.util.*;public class ChatServer boolean stat = false; ServerSocket ss = null; List clients = new ArrayList();/用于存客户端 public static void main(String args) new ChatServer().start(); public void start() try ss = new ServerSocket(8888); stat = true; catc

2、h(BindException e) /Sever端已经运行，当重复运行时抛异常 System.out.println(端口正在使用中。); System.out.println(请关掉相关程序并重新运行服务器！); /还会抛别的异常，所以直接关闭窗口 System.exit(0); catch(IOException e) e.printStackTrace(); try while(stat) Socket s = ss.accept();System.out.println(a client connected! ); /测试语句写在最左边，以后没用可以删除或注掉 Client c =

3、new Client(s); /每建立一个客户端，就new一个客户端对象，启动一个线程 new Thread(c).start(); clients.add(c); /勿忘写，将每个客户端加入到容器里 catch (IOException e) e.printStackTrace(); finally try ss.close(); catch (IOException e) e.printStackTrace(); class Client implements Runnable private Socket s; private DataInputStream dis; private D

4、ataOutputStream dos; private boolean cont = false; public Client(Socket s) this.s = s; try dis = new DataInputStream(s.getInputStream();/初始化 dos = new DataOutputStream(s.getOutputStream(); cont = true; catch (IOException e) e.printStackTrace(); public void send(String str) /用于发送给客户端 try dos.writeUTF

5、(str); catch (IOException e) clients.remove(this); /移除那个退出的对象 System.out.println(一个客户退出了); /e.printStackTrace(); public void run() try while(cont) String str = dis.readUTF(); /阻塞式方法System.out.println(str); for(int i=0; iclients.size(); i+) Client c = clients.get(i); /取客户端 c.send(str); /* 另外两种方法，但不适用

6、，它会锁定服务端 for(Iterator it = clients.iterator(); it.hasNext();) Client c = it.next(); c.send(str); Iterator it = clients.iterator(); while(it.hasNext() Client c = it.next(); c.send(str); */ catch (EOFException e) /readUTF()阻塞式方法，所以关闭客户端会抛异常 System.out.println(Client closed!); catch (IOException e) e.p

7、rintStackTrace(); finally try if(dis != null) dis.close(); if(dos != null) dos.close(); if(s != null) s.close(); s = null;/更严格的方法，等于空就没人去用了，垃圾收集器就回收走 catch (IOException e) e.printStackTrace(); 客户端：import java.awt.*;import java.awt.event.*;import java.io.*;import .*;public class ChatClient ex

8、tends Frame Socket s = null; DataOutputStream dos = null; DataInputStream dis = null; private boolean cont = false; TextField tfTxt = new TextField(); TextArea taContent = new TextArea(); Thread tRecv = new Thread(new RecvThread(); public static void main(String args) new ChatClient().launchFrame();

9、 public void launchFrame() setLocation(400, 300); this.setSize(300, 300); add(tfTxt,BorderLayout.SOUTH); add(taContent,BorderLayout.NORTH); pack(); /包在一起，去掉中间空着的 this.addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) disconnect(); System.exit(0); ); tfTxt.addActionListen

10、er(new TfListent(); setVisible(true); connect(); tRecv.start(); /启动线程 public void connect() try s = new Socket(,8888);/注意不要定义成Socket s,这就成了局部变量而不是成员变量了System.out.println(connected!); dos = new DataOutputStream(s.getOutputStream(); dis = new DataInputStream(s.getInputStream(); cont = true; c

11、atch (UnknownHostException e) e.printStackTrace(); catch (IOException e) e.printStackTrace(); public void disconnect() try dos.close(); dis.close(); s.close(); catch (IOException e) e.printStackTrace(); /*/无法解决readUTF阻塞式方法 try cont = false; /关闭线程 tRecv.join(); /合并线程，彻底让他停止 catch (InterruptedExceptio

12、n e) e.printStackTrace(); finally try dos.close(); /线程停止之后才能关流，不然抛SocketException异常 dis.close(); s.close(); catch (IOException e) e.printStackTrace(); */ private class TfListent implements ActionListener public void actionPerformed(ActionEvent e) String str = tfTxt.getText().trim(); tfTxt.setText(); try dos.writeUTF(str); dos.flush(); catch (IOException e1) e1.printStackTrace(); private class RecvThread implements Runnable public void run() try while(cont) String str = dis.readUTF(); taContent.setText(taContent.getText() + str + n); catch (SocketException e) System.out.println(退出