[置顶] Java Socket实战之二 多线程通信

本文地址：http://blog.csdn.net/kongxx/article/details/7259465

Java Socket实战之一 单线程通信

上一篇文章说到怎样写一个最简单的Java Socket通信，但是在上一篇文章中的例子有一个问题就是Server只能接受一个Client请求，当第一个Client连接后就占据了这个位置，后续Client不能再继续连接，所以需要做些改动，当Server没接受到一个Client连接请求之后，都把处理流程放到一个独立的线程里去运行，然后等待下一个Client连接请求，这样就不会阻塞Server端接收请求了。每个独立运行的程序在使用完Socket对象之后要将其关闭。具体代码如下：

package com.googlecode.garbagecan.test.socket.sample2; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.ServerSocket; import java.net.Socket; public class MyServer { public static void main(String[] args) throws IOException { ServerSocket server = new ServerSocket(10000); while (true) { Socket socket = server.accept(); invoke(socket); } } private static void invoke(final Socket client) throws IOException { new Thread(new Runnable() { public void run() { BufferedReader in = null; PrintWriter out = null; try { in = new BufferedReader(new InputStreamReader(client.getInputStream())); out = new PrintWriter(client.getOutputStream()); while (true) { String msg = in.readLine(); System.out.println(msg); out.println("Server received " + msg); out.flush(); if (msg.equals("bye")) { break; } } } catch(IOException ex) { ex.printStackTrace(); } finally { try { in.close(); } catch (Exception e) {} try { out.close(); } catch (Exception e) {} try { client.close(); } catch (Exception e) {} } } }).start(); } }下面是Client程序代码：package com.googlecode.garbagecan.test.socket.sample2; import java.io.BufferedReader; import java.io.InputStreamReader; import java.io.PrintWriter; import java.net.Socket; public class MyClient { public static void main(String[] args) throws Exception { Socket socket = new Socket("localhost", 10000); BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream())); PrintWriter out = new PrintWriter(socket.getOutputStream()); BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); while (true) { String msg = reader.readLine(); out.println(msg); out.flush(); if (msg.equals("bye")) { break; } System.out.println(in.readLine()); } socket.close(); } } 测试，首先运行MyServer类，然后运行两个MyClient类，然后分别在每个MyClient的提示符下输入字符串，就可以看到Server可以分别接收处理每个Client的请求了。