简单了解websocket

ping、ipconfig

Process p = Runtime.getRuntime().exec("ping " + "192.168.1.108");
      BufferedReader br = new BufferedReader(new InputStreamReader(p.getInputStream()));
      String line = null;
      StringBuilder sb = new StringBuilder();
      while ((line = br.readLine()) != null) {
          if (line.length() != 0)
              sb.append(line + "\r\n");
      }
      System.out.println("本次指令返回的消息是：");
      System.out.println(sb.toString());

Process p = Runtime.getRuntime().exec("ipconfig");
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(p.getInputStream()));
        String line = null;
        StringBuilder stringBuilder = new StringBuilder();
        while ((line=bufferedReader.readLine())!=null){
            if (line.length()!=0){
                stringBuilder.append(line+"\r\n");
            }
        }
        System.out.println(stringBuilder.toString());

建立连接

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(3000);
        Socket accept = serverSocket.accept();
        System.err.println(accept+"连接了");
    }
}

public class Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("127.0.0.1", 3000);
        System.err.println(socket);
    }
}

收发数字

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(3000);
        Socket accept = serverSocket.accept();
        InputStream inputStream = accept.getInputStream();
        System.err.println(inputStream.read());
    }
}

public class Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("127.0.0.1", 3000);
        OutputStream outputStream = socket.getOutputStream();
        outputStream.write(100);
    }
}

收发字符串

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(3000);
        Socket accept = serverSocket.accept();
        InputStream inputStream = accept.getInputStream();
        DataInputStream dataInputStream = new DataInputStream(inputStream);
        System.err.println(dataInputStream.readUTF());
    }
}

public class Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("127.0.0.1", 3000);
        OutputStream outputStream = socket.getOutputStream();
        DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
        dataOutputStream.writeUTF("段友元");
    }
}

控制台输入

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(3000);
        Socket accept = serverSocket.accept();
        InputStream inputStream = accept.getInputStream();
        DataInputStream dataInputStream = new DataInputStream(inputStream);
        System.err.println(dataInputStream.readUTF());
    }
}

public class Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("127.0.0.1", 3000);
        OutputStream outputStream = socket.getOutputStream();
        DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
        Scanner scanner = new Scanner(System.in);
        dataOutputStream.writeUTF(scanner.next());
    }
}

服务器与客户端聊天实现

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(3000);
        Socket accept = serverSocket.accept();
        InputStream inputStream = accept.getInputStream();
        OutputStream outputStream = accept.getOutputStream();
        DataInputStream dataInputStream = new DataInputStream(inputStream);
        DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
        while (true){
            System.err.println(dataInputStream.readUTF());
            Scanner scanner = new Scanner(System.in);
            dataOutputStream.writeUTF("服务器："+scanner.next());
        }
    }
}

public class Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket("127.0.0.1", 3000);
        OutputStream outputStream = socket.getOutputStream();
        InputStream inputStream = socket.getInputStream();
        DataOutputStream dataOutputStream = new DataOutputStream(outputStream);
        DataInputStream dataInputStream = new DataInputStream(inputStream);
        while (true){
            Scanner scanner = new Scanner(System.in);
            dataOutputStream.writeUTF("客户端："+scanner.next());
            System.err.println(dataInputStream.readUTF());
        }
    }
}