java线程之二 多线程
单线程开发模式中。如果一个客户端没有与客户端断开连接，则其他的客户端就必须
一直等待。多线程则允许多个客户端同时连接服务端，而不需要等待其他客户端断开后
才可以连接，也就是通常所说的非阻塞通信。
服务端
1 /** 2 * @author draem0507@gmail.com 3 * @TODO java线程开发之二 多线程 4 * @version 1.0 5 * @date 2013-5-7下午09:19:45 6 * @blgos http://www.cnblogs.com/draem0507 7 */ 8 9 10 class ServerTest { 11 private ServerSocket serverSocket; 12 13 14 15 public ServerTest() { 16 try { 17 serverSocket = new ServerSocket(10000); 18 // 开启无限循环 创建每个客户端的socket线程 19 while (true) { 20 Socket socket = serverSocket.accept(); 21 new ReceiveSocket(socket).start(); 22 } 23 } catch (IOException e) { 24 // TODO Auto-generated catch block 25 e.printStackTrace(); 26 } 27 28 } 29 30 public static void main(String[] args) { 31 new ServerTest(); 32 33 } 34 35 private class ReceiveSocket extends Thread { 36 private Socket socket; 37 38 public ReceiveSocket(Socket socket) { 39 this.socket = socket; 40 } 41 42 private BufferedReader reader; 43 private PrintWriter writer; 44 45 @Override 46 public void run() { 47 48 try { 49 reader = new BufferedReader(new InputStreamReader(socket 50 .getInputStream())); 51 writer = new PrintWriter(socket.getOutputStream(), true); 52 // 开启无限循环 监控消息 53 while (true) { 54 String msg = reader.readLine(); 55 System.out.println("客户端对你说:" + msg); 56 // write(msg)+write("\r")==println() 具体请参考PrintWriter源码 57 writer.write("服务端收到客户端发送的信息:" + msg); 58 writer.println(); 59 while (msg.equals("bye")) { 60 break; 61 } 62 } 63 64 } catch (IOException e) { 65 // TODO Auto-generated catch block 66 e.printStackTrace(); 67 } finally { 68 if (null != reader) { 69 try { 70 reader.close(); 71 } catch (IOException e) { 72 // TODO Auto-generated catch block 73 e.printStackTrace(); 74 } 75 } 76 if (null != writer) { 77 try { 78 reader.close(); 79 } catch (IOException e) { 80 // TODO Auto-generated catch block 81 e.printStackTrace(); 82 } 83 } 84 try { 85 socket.close(); 86 } catch (IOException e) { 87 // TODO Auto-generated catch block 88 e.printStackTrace(); 89 } 90 } 91 92 } 93 94 } 95 96 }
客户端
1 public class ClientTest { 2 public static void main(String[] args) throws Exception { 3 Socket socket = new Socket("localhost", 10000); 4 BufferedReader in = new BufferedReader(new InputStreamReader(socket 5 .getInputStream())); 6 PrintWriter out = new PrintWriter(socket.getOutputStream()); 7 BufferedReader reader = new BufferedReader(new InputStreamReader( 8 System.in)); 9 10 while (true) { 11 String msg = reader.readLine(); 12 out.println(msg); 13 out.flush(); 14 if (msg.equals("bye")) { 15 break; 16 } 17 System.out.println(in.readLine()); 18 } 19 socket.close(); 20 } 21 }
运行服务端后，可以多次运行客户端，并且之间的通信是互不干扰。
顺便提个问题，如果实现客户端与客户端的通信 及其服务端如何群发信息给客户端，感兴趣的朋友可以去研究下。
