一个客户端和一个服务器端聊天

    import java.io.IOException;
    import java.io.OutputStream;
    import java.net.Socket;
    import java.util.Scanner;
    
    public class SendThread extends Thread {
        private Socket socket;
        public SendThread(Socket socket){
            this.socket = socket;
        }
        @Override
        public void run() {
            //获得输出管道。
            try {
                OutputStream os = socket.getOutputStream();
                //接收键盘录入的数据。
                Scanner input = new Scanner(System.in);
                String str = null;
                while(true){
                    str = input.nextLine();
                    os.write((str+"\r\n").getBytes());
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.InputStreamReader;
    import java.net.Socket;
    
    public class ReceiverThread extends Thread {
        private Socket socket;
        public ReceiverThread(Socket socket){
            this.socket = socket;
        }
        //接收数据。
        @Override
        public void run() {
            //获得读取管道。
            try {
                InputStream is = socket.getInputStream();
                BufferedReader br = new BufferedReader(new InputStreamReader(is));
                String ip = socket.getInetAddress().getHostAddress();
                int port = socket.getPort();
                String str = null;
                while(true){
                    if(socket==null){
                        break;
                    }
                    str = br.readLine();
                    System.out.println(ip+"-"+port+":"+str);
                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    import java.io.IOException;
    import java.net.Socket;
    import java.net.UnknownHostException;
    
    /*
     * 一个客户端与一个服务端进行聊天。
     * 1:接收数据，
     * 2：发送数据。
     *     同时进行。：线程。 一个线程负责接收数据，一个线程负责发送数据。
     */
    public class ChatClient {
        public static void main(String[] args)  {
            try {
                Socket socket = new Socket("127.0.0.1",9988);
                //开启线程。
                new SendThread(socket).start();
                new ReceiverThread(socket).start();
            } catch (UnknownHostException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

    import java.io.IOException;
    import java.net.ServerSocket;
    import java.net.Socket;
    
    public class ChatServer {
        public static void main(String[] args) {
            try {
                ServerSocket ss = new ServerSocket(9988);
                Socket s = ss.accept();
                new SendThread(s).start();
                new ReceiverThread(s).start();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }