基于Socket长连接多线程传输数据的简单示例-优快云博客

本文提供了一个简单的Java网络编程示例，包括服务器端与客户端的交互过程。服务器监听9090端口接收客户端发送的数据，并打印接收到的浮点数值。客户端则周期性地向服务器发送预定义的字符串形式的浮点数。

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import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		ServerSocket socketServer = new ServerSocket(9090);
		while (true) {
			Socket socket = socketServer.accept();
			InputStream in = socket.getInputStream();
			byte[] b = new byte[7];
			int len;
			try {
				while ((len = in.read(b)) != -1) {
					String value = new String(b, 0, len);
					double d=Double.parseDouble(value);
					//process data
					System.out.println(d);
				}
			} catch (Exception ex) {
				//handle exception
				ex.printStackTrace();
			}
		}
	}

}


import java.io.OutputStream;
import java.net.Socket;

public class Client {
	static class SendThread extends Thread {
		Socket server;
		byte[] value;

		public SendThread(Socket server, String value) {
			super();
			this.server = server;
			this.value = value.getBytes();
		}

		public void run() {
			while (true) {
				try {
					OutputStream out = server.getOutputStream();
					out.write(value);
					out.flush();
					Thread.sleep(1000);
				} catch (Exception ex) {
					return;
				}
			}
		}
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception {
		Socket server = new Socket("localhost", 9090);
		SendThread t1 = new SendThread(server, "1111.11");
		SendThread t2 = new SendThread(server, "2222.22");
		SendThread t3 = new SendThread(server, "3333.33");
		t1.start();
		t2.start();
		t3.start();
	}

}