java对于websocket的demo

Java对于WebSocket的Demo可以参考以下代码：

import java.net.URI;
import java.net.URISyntaxException;
import java.util.Scanner;
import org.java_websocket.client.WebSocketClient;
import org.java_websocket.handshake.ServerHandshake;

public class WebSocketDemo {
    public static void main(String[] args) throws URISyntaxException {
        WebSocketClient client = new WebSocketClient(new URI("ws://localhost:8888")) {
            @Override
            public void onOpen(ServerHandshake handshakedata) {
                System.out.println("Connected to server");
            }

            @Override
            public void onMessage(String message) {
                System.out.println("Received message: " + message);
            }

            @Override
            public void onClose(int code, String reason, boolean remote) {
                System.out.println("Connection closed");
            }

            @Override
            public void onError(Exception ex) {
                ex.printStackTrace();
            }
        };

        client.connect();

        Scanner scanner = new Scanner(System.in);
        while (true) {
            String input = scanner.nextLine();
            if (input.equals("exit")) {
                client.close();
                break;
            }
            client.send(input);
        }
    }
}

这是一个简单的Java WebSocket客户端，它连接到本地主机的8888端口，并等待用户输入消息。当用户输入消息时，它将消息发送到服务器，并在收到来自服务器的消息时打印它们。用户可以通过输入“exit”来关闭客户端。