如何使用 Java WebSocket API 关闭 websocket 连接？我已经将 Java websocket API 用于服务器和客户端端点。该应用程序运行良好。但我不知道如何在主线程结束之前关闭 websocket。
这是我的 ClientEndpoint
package websocket.client;
import java.io.IOException;
import javax.websocket.MessageHandler;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
@ClientEndpoint
public class EchoClient {
Session session;
//request
@OnOpen
public void onOpen(Session session, EndpointConfig config) {
System.out.println("Connected to endpoint: " + session.getBasicRemote());
this.session = session;
sendMessage("Welcome to WebSocket");
}
//response
@OnMessage
public void onMessage(String text) {
System.out.println("Received response in client from server: " + text);
}
@OnError
public void onError(Session session, Throwable t) {
t.printStackTrace();
}
private void sendMessage(String message) {
System.out.println("Sending message from client to server: " + message);
System.out.println(session);
try {
session.getBasicRemote().sendText(message);
} catch (IOException e) {
e.printStackTrace();
}
}
}
我使用以下代码启动 ClientEndPoint
import java.io.IOException;
import java.net.URI;
import javax.websocket.ContainerProvider;
import javax.websocket.DeploymentException;
import javax.websocket.WebSocketContainer;
import websocket.client.EchoClient;
public class WebSocketDemo {
public static void main(String[] args) {
String uri = "ws://localhost:8080/websocket";
System.out.println("Connecting to " + uri);
WebSocketContainer container = ContainerProvider.getWebSocketContainer();
try {
container.connectToServer(EchoClient.class, URI.create(uri));
} catch (DeploymentException | IOException e) {
e.printStackTrace();
}
try {
Thread.sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
PS：我没有使用过 JavaScript。