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：
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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();
}
}
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下面是Client程序代码：
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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();
}
}
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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。