传统socket举例--基于io

最新推荐文章于 2024-04-28 20:43:30 发布

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#socket #string #class #thread #io

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本文介绍了一个基于Java实现的简单并发服务器及其客户端的搭建过程。该服务器利用固定大小的线程池处理客户端请求，并通过计数的方式统计处理100个连接所花费的时间。

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教程网上多的是,直接上代码..

ServerMain.java

package test.server; import java.io.IOException; import java.net.ServerSocket; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class ServerMain { private ServerSocket ss; private ExecutorService pool; public ServerMain(int port, int num) throws IOException { ss = new ServerSocket(port); pool = Executors.newFixedThreadPool(num); } public void run() { System.out.println("listen to port..."); while(true){ try { pool.execute(new TCPHandler(ss.accept())); } catch (IOException e) { e.printStackTrace(); } } } public static void main(String[] args) throws IOException { new ServerMain(8888,10).run(); } }

TCPHandler

package test.server; import java.io.IOException; import java.io.OutputStreamWriter; import java.net.Socket; import java.util.concurrent.TimeUnit; import test.Num; class TCPHandler implements Runnable { Socket client; public TCPHandler(Socket client) { this.client = client; } public void run() { if (Num.num == 0) { Num.start = System.currentTimeMillis(); } OutputStreamWriter osw; try { osw = new OutputStreamWriter(client.getOutputStream()); try { TimeUnit.SECONDS.sleep(1L); // 休眠1秒 } catch (InterruptedException e) { e.printStackTrace(); } osw.write("connect to server..."); osw.flush(); osw.close(); Num.add(); if (Num.num == 99) { Num.end = System.currentTimeMillis(); System.out.println("处理共用时: " + (Num.end - Num.start) / 1000 + "秒"); } } catch (IOException e1) { e1.printStackTrace(); } } }

Num.java

package test; public class Num { public static long start; public static long end; public static int num = 0; public static synchronized void add() { num ++; } }

ClientMain.java

package test.client; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.InetSocketAddress; import java.net.Socket; import java.net.SocketAddress; public class ClientMain implements Runnable { private Socket s = new Socket(); private SocketAddress sa; public ClientMain(String uri ,int port) throws IOException { sa = new InetSocketAddress(uri, port); } public void run() { try { s.connect(sa); BufferedReader br = new BufferedReader(new InputStreamReader(s.getInputStream())); System.out.println(br.readLine()); br.close(); } catch (IOException e) { e.printStackTrace(); } } public static void main(String[] args) { int i = 100; while(i-- > 0){ try { new Thread(new ClientMain("127.0.0.1", 8888)).start(); } catch (IOException e) { e.printStackTrace(); } } } }

注意:性能主要取决于 Executors.newFixedThreadPool(num); num的大小..

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