本文实例讲述了Java基于socket实现的客户端和服务端通信功能。分享给大家供大家参考，具体如下：
以下代码参考马士兵的聊天项目，先运行ChatServer.java实现端口监听，然后再运行ChatClient.java
客户端实例
ChatClient.java
package socketDemo;import java.awt.*;import java.awt.event.*;import java.io.*;import java.net.*;public class ChatClient extends Frame { Socket s = null; DataOutputStream dos = null; DataInputStream dis = null; private boolean bConnected = false; TextField tfTxt = new TextField(); TextArea taContent = new TextArea(); Thread tRecv = new Thread(new RecvThread()); public static void main(String[] args) { new ChatClient().launchFrame(); } public void launchFrame() { setLocation(400, 300); this.setSize(300, 300); add(tfTxt, BorderLayout.SOUTH); add(taContent, BorderLayout.NORTH); pack(); this.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent arg0) { disconnect(); System.exit(0); } }); tfTxt.addActionListener(new TFListener()); setVisible(true); connect(); tRecv.start(); } public void connect() { try { s = new Socket("localhost", 8888); dos = new DataOutputStream(s.getOutputStream()); dis = new DataInputStream(s.getInputStream()); System.out.println("connected!"); bConnected = true; } catch (UnknownHostException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } public void disconnect() { try { dos.close(); dis.close(); s.close(); } catch (IOException e) { e.printStackTrace(); } /* * try { bConnected = false; tRecv.join(); } catch(InterruptedException * e) { e.printStackTrace(); } finally { try { dos.close(); dis.close(); * s.close(); } catch (IOException e) { e.printStackTrace(); } } */ } private class TFListener implements ActionListener { public void actionPerformed(ActionEvent e) { String str = tfTxt.getText().trim(); // taContent.setText(str); tfTxt.setText(""); try { // System.out.println(s); dos.writeUTF(str); dos.flush(); // dos.close(); } catch (IOException e1) { e1.printStackTrace(); } } } private class RecvThread implements Runnable { public void run() { try { while (bConnected) { String str = dis.readUTF(); // System.out.println(str); taContent.setText(taContent.getText() + str + '/n'); } } catch (SocketException e) { System.out.println("退出了，bye!"); } catch (EOFException e) { System.out.println("推出了，bye - bye!"); } catch (IOException e) { e.printStackTrace(); } } }}socket服务端代码
ChatServer.java
package socketDemo;import java.io.*;import java.net.*;import java.util.*;public class ChatServer { boolean started = false; ServerSocket ss = null; List<Client> clients = new ArrayList<Client>(); public static void main(String[] args) { new ChatServer().start(); } public void start() { try { ss = new ServerSocket(8888); started = true; } catch (BindException e) { System.out.println("端口使用中...."); System.out.println("请关掉相关程序并重新运行服务器！"); System.exit(0); } catch (IOException e) { e.printStackTrace(); } try { while (started) { Socket s = ss.accept(); Client c = new Client(s); System.out.println("a client connected!"); new Thread(c).start(); clients.add(c); // dis.close(); } } catch (IOException e) { e.printStackTrace(); } finally { try { ss.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } class Client implements Runnable { private Socket s; private DataInputStream dis = null; private DataOutputStream dos = null; private boolean bConnected = false; public Client(Socket s) { this.s = s; try { dis = new DataInputStream(s.getInputStream()); dos = new DataOutputStream(s.getOutputStream()); bConnected = true; } catch (IOException e) { e.printStackTrace(); } } public void send(String str) { try { dos.writeUTF(str); } catch (IOException e) { clients.remove(this); System.out.println("对方退出了！我从List里面去掉了！"); // e.printStackTrace(); } } public void run() { try { while (bConnected) { String str = dis.readUTF(); System.out.println(str); for (int i = 0; i < clients.size(); i++) { Client c = clients.get(i); c.send(str); // System.out.println(" a string send !"); } /* * for(Iterator<Client> it = clients.iterator(); * it.hasNext(); ) { Client c = it.next(); c.send(str); } */ /* * Iterator<Client> it = clients.iterator(); * while(it.hasNext()) { Client c = it.next(); c.send(str); * } */ } } catch (EOFException e) { System.out.println("Client closed!"); } catch (IOException e) { e.printStackTrace(); } finally { try { if (dis != null) dis.close(); if (dos != null) dos.close(); if (s != null) { s.close(); // s = null; } } catch (IOException e1) { e1.printStackTrace(); } } } }}本机测试运行结果：
关闭客户端窗口后，提示信息如下：
更多关于java相关内容感兴趣的读者可查看本站专题：《Java Socket编程技巧总结》、《Java文件与目录操作技巧汇总》、《Java数据结构与算法教程》、《Java操作DOM节点技巧总结》和《Java缓存操作技巧汇总》
希望本文所述对大家java程序设计有所帮助。