[置頂] Java Socket實戰之二 多線程通訊

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

Java Socket實戰之一 單線程通訊

上一篇文章說到怎樣寫一個最簡單的Java Socket通訊，但是在上一篇文章中的例子有一個問題就是Server只能接受一個Client請求，當第一個Client串連後就佔據了這個位置，後續Client不能再繼續串連，所以需要做些改動，當Server沒接受到一個Client串連請求之後，都把處理流程放到一個獨立的線程裡去運行，然後等待下一個Client串連請求，這樣就不會阻塞Server端接收請求了。每個獨立啟動並執行程式在使用完Socket對象之後要將其關閉。具體代碼如下：

package com.googlecode.garbagecan.test.socket.sample2;</p><p>import java.io.BufferedReader;<br />import java.io.IOException;<br />import java.io.InputStreamReader;<br />import java.io.PrintWriter;<br />import java.net.ServerSocket;<br />import java.net.Socket;</p><p>public class MyServer {<br />public static void main(String[] args) throws IOException {<br />ServerSocket server = new ServerSocket(10000);</p><p>while (true) {<br />Socket socket = server.accept();<br />invoke(socket);<br />}<br />}</p><p>private static void invoke(final Socket client) throws IOException {<br />new Thread(new Runnable() {<br />public void run() {<br />BufferedReader in = null;<br />PrintWriter out = null;<br />try {<br />in = new BufferedReader(new InputStreamReader(client.getInputStream()));<br />out = new PrintWriter(client.getOutputStream());</p><p>while (true) {<br />String msg = in.readLine();<br />System.out.println(msg);<br />out.println("Server received " + msg);<br />out.flush();<br />if (msg.equals("bye")) {<br />break;<br />}<br />}<br />} catch(IOException ex) {<br />ex.printStackTrace();<br />} finally {<br />try {<br />in.close();<br />} catch (Exception e) {}<br />try {<br />out.close();<br />} catch (Exception e) {}<br />try {<br />client.close();<br />} catch (Exception e) {}<br />}<br />}<br />}).start();<br />}<br />}下面是Client程式碼：package com.googlecode.garbagecan.test.socket.sample2;</p><p>import java.io.BufferedReader;<br />import java.io.InputStreamReader;<br />import java.io.PrintWriter;<br />import java.net.Socket;</p><p>public class MyClient {<br />public static void main(String[] args) throws Exception {<br />Socket socket = new Socket("localhost", 10000);<br />BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));<br />PrintWriter out = new PrintWriter(socket.getOutputStream());<br />BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));</p><p>while (true) {<br />String msg = reader.readLine();<br />out.println(msg);<br />out.flush();<br />if (msg.equals("bye")) {<br />break;<br />}<br />System.out.println(in.readLine());<br />}<br />socket.close();<br />}<br />}<br />測試，首先運行MyServer類，然後運行兩個MyClient類，然後分別在每個MyClient的提示符下輸入字串，就可以看到Server可以分別接收處理每個Client的請求了。