本文实例讲述了Java Socket实现多线程通信功能的方法。分享给大家供大家参考,具体如下:
前面的文章《Java Socket实现单线程通信的方法示例》说到怎样写一个最简单的Java Socket通信,但是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。代码如下:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
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:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
|
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。
希望本文所述对大家java程序设计有所帮助。