socket与线程

 Socket socket=new Socket("localhost",9999);
    System.out.println("远程主机地址："+socket.getRemoteSocketAddress());
    DataOutputStream out=new DataOutputStream(socket.getOutputStream());
    out.writeUTF("我是客户端，我要连你了，我来自："+socket.getLocalSocketAddress());

    DataInputStream input=new DataInputStream(socket.getInputStream());
    System.out.println(input.readUTF());
    socket.close();

public class Main extends Thread {
    private ServerSocket serverSocket;

    public Main(int port) throws IOException {
        serverSocket = new ServerSocket(port);
        serverSocket.setSoTimeout(10000);//超时时间，accept获取请求的超时时间，超过十秒就断Accept timed out
    }

    @Override
    public void run() {
        while (true) {
            System.out.println("等待远程 连接端口：" + serverSocket.getLocalPort());
            try {
                Socket socket = serverSocket.accept();//SocketTimeoutException: Accept timed out
                System.out.println("远程主机地址：" + socket.getRemoteSocketAddress());
                DataInputStream ds = new DataInputStream(socket.getInputStream());
                System.out.println(ds.readUTF());

                DataOutputStream out=new DataOutputStream(socket.getOutputStream());
                out.writeUTF("你连接上我了："+socket.getLocalSocketAddress()+"
goodbye");
                socket.close();

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

这段代码，服务端加了多线程，新开了一个线程连接客户端。

也可以客户端多开几个线程请求服务端，就不写了。