从http://www.blogjava.net/sterning/archive/2007/10/15/152940.html摘了篇java socket thread 的文章:
服务端:
class="java">package com.lyq.socket.server; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.PrintWriter; import java.net.*; import java.util.concurrent.*; //服务端 public class SocketServer { private int port = 8821; private ServerSocket serverSocket; private ExecutorService executorService;// 线程池 private final int POOL_SIZE = 10;// 单个CPU 线程池大小 public SocketServer() throws IOException { serverSocket = new ServerSocket(port); // Runtime 的availableProcessor()方法返 回当前系统的CPU数目. executorService = Executors.newFixedThreadPool(Runtime.getRuntime() .availableProcessors() * POOL_SIZE); System.out.println(" 服务器启动"); } public void service() { while (true) { Socket socket = null; try { // 接收客户连接,只要客户进行了连 接,就会触发accept();从而建立连接 socket = serverSocket.accept(); executorService.execute(new Handler(socket)); } catch (Exception e) { e.printStackTrace(); } } } public static void main(String[] args) throws IOException { new SocketServer().service(); } } class Handler implements Runnable { private Socket socket; public Handler(Socket socket) { this.socket = socket; } private PrintWriter getWriter(Socket socket) throws IOException { OutputStream socketOut = socket.getOutputStream(); return new PrintWriter(socketOut, true); } private BufferedReader getReader(Socket socket) throws IOException { InputStream socketIn = socket.getInputStream(); return new BufferedReader(new InputStreamReader(socketIn)); } public String echo(String msg) { return "echo:" + msg; } public void run() { try { System.out.println("New connection a ccepted " + socket.getInetAddress() + ":" + socket.getPort()); BufferedReader br = getReader(socket); PrintWriter pw = getWriter(socket); String msg = null; while ((msg = br.readLine()) != null) { System.out.println(msg); pw.println(echo(msg)); if (msg.equals("bye")) break; } } catch (IOException e) { e.printStackTrace(); } finally { try { if (socket != null) socket.close(); } catch (IOException e) { e.printStackTrace(); } } } }
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客户端代码如下:
package com.lyq.socket.client; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.Socket; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; //客户端 public class SocketClient { public static void main(String[] args) { int numTasks = 110; ExecutorService exec = Executors.newCachedThreadPool(); for (int i = 0; i < numTasks; i++) { exec.execute(createTask(i)); } } // 定义一个简单的任务 private static Runnable createTask(final int taskID) { return new Runnable() { private Socket socket = null; private int port = 8821; public void run() { System.out.println("Task " + taskID + ":start"); try { socket = new Socket("localhost", port); // 发送关闭命令 OutputStream socketOut = socket.getOutputStream(); socketOut.write("shutdown\r\n".getBytes()); // 接收服务器的反馈 BufferedReader br = new BufferedReader( new InputStreamReader(socket.getInputStream())); String msg = null; while ((msg = br.readLine()) != null) System.out.println(msg); } catch (IOException e) { e.printStackTrace(); } } }; } }
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采用Java 5的ExecutorService来进行线程池的方式实现多线程,模拟客户端多用户向同一服务器端发送请求.
从而实现了多个客户端向服务器端发送请求,服务器端采用多线程的方式来处理的情况.