package sterning;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.Socket;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
public class MultiThreadClient {
public static void main(String[] args) {
int numTasks = 10;
ExecutorService exec = Executors.newCachedThreadPool();
for (int i = 0; i < numTasks; i++) {
exec.execute(createTask(i));
}
}
// 定义一个简单的任务
    private static Runnable createTask(final int taskID) {
return new Runnable() {
private Socket socket = null;
private int port=8821;
public void run() {
System.out.println("Task " + taskID + ":start");
try {
socket = new Socket("localhost", port);
// 发送关闭命令
                    OutputStream socketOut = socket.getOutputStream();
socketOut.write("shutdown\r\n".getBytes());
// 接收服务器的反馈
                    BufferedReader br = new BufferedReader(
new InputStreamReader(socket.getInputStream()));
String msg = null;
while ((msg = br.readLine()) != null)
System.out.println(msg);
} catch (IOException e) {
e.printStackTrace();
}
}
};
}
}

从而实现了多个客户端向服务器端发送请求,服务器端采用多线程的方式来处理的情况.再结合我之前的例子---Java基于Socket文件传输示例,就可以实现多线程文件的传输了

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