org.springframework.messaging.simp.stomp.ConnectionLostException：连接已关闭

Question

我正在学习websocket编程，当我去连接WebSocketStompClient时，我得到了这个异常org.springframework.messaging.simp.stomp.ConnectionLostException: Connection closed所以它没有正确连接可以帮助我吗？ 这是我的代码：

public class HelloClient {

private final static WebSocketHttpHeaders headers = new WebSocketHttpHeaders();



public void connect() throws InterruptedException {

    Transport webSocketTransport = new WebSocketTransport(new StandardWebSocketClient());
    List<Transport> transports = Collections.singletonList(webSocketTransport);

    SockJsClient sockJsClient = new SockJsClient(transports);
    sockJsClient.setMessageCodec(new Jackson2SockJsMessageCodec());

    WebSocketStompClient stompClient = new WebSocketStompClient(sockJsClient);

    String auth = "t:t";
    String base64Credentials = Base64.getEncoder().encodeToString(auth.getBytes());
    headers.add("Authorization", "Basic " + base64Credentials);

    String url = "ws://188.75.73.196:7777/datxpapi/dtxws";
    stompClient.setInboundMessageSizeLimit(1000);
   ListenableFuture<StompSession> s= stompClient.connect(url, headers, new MySessionHandler()); 

   if(s.isDone()){
       System.out.println("s done working");
   }

   s.addCallback(new ListenableFutureCallback<StompSession>() {
       @Override
       public void onSuccess(StompSession  response) {
           System.out.println("Success");
           System.out.println(response);
       }

       @Override
       public void onFailure(Throwable t) {
         System.out.println("error");
       }
   });

}


public class MySessionHandler extends StompSessionHandlerAdapter {


    @Override
    public void afterConnected(StompSession session, 
                               StompHeaders connectedHeaders) {

            System.out.println("after connect");

    }

    @Override
    public void handleException(StompSession stompSession, StompCommand stompCommand, StompHeaders stompHeaders, byte[] bytes, Throwable throwable) {
        System.out.println("err0");
    }

    @Override
    public void handleTransportError(StompSession stompSession, Throwable throwable) {
        if (throwable instanceof ConnectionLostException) {
            System.out.println(throwable);            }
    }  
}

public static void main(String[] args) throws Exception {
    HelloClient helloClient = new HelloClient();
    helloClient.connect();
}

}

完整追踪：     在org.springframework.messaging.simp.stomp.DefaultStompSession.afterConnectionClosed（DefaultStompSession.java:459）     在org.springframework.web.socket.messaging.WebSocketStompClient $ WebSocketTcpConnectionHandlerAdapter.afterConnectionClosed（WebSocketStompClient.java:353）     在org.springframework.web.socket.sockjs.client.AbstractClientSockJsSession.afterTransportClosed（AbstractClientSockJsSession.java:321）     在org.springframework.web.socket.sockjs.client.WebSocketTransport $ ClientSockJsWebSocketHandler.afterConnectionClosed（WebSocketTransport.java:172）     在org.springframework.web.socket.adapter.standard.StandardWebSocketHandlerAdapter.onClose（StandardWebSocketHandlerAdapter.java:143）     at org.eclipse.jetty.websocket.jsr356.endpoints.JsrEndpointEventDriver.onClose（JsrEndpointEventDriver.java:128）     at org.eclipse.jetty.websocket.jsr356.endpoints.AbstractJsrEventDriver.onClose（AbstractJsrEventDriver.java:80）     在org.eclipse.jetty.websocket.common.WebSocketSession.notifyClose（WebSocketSession.java:369）     在org.eclipse.jetty.websocket.common.WebSocketSession.onConnectionStateChange（WebSocketSession.java:401）     在org.eclipse.jetty.websocket.common.io.IOState.notifyStateListeners（IOState.java:185）     在org.eclipse.jetty.websocket.common.io.IOState.onAbnormalClose（IOState.java:220）     at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection $ OnCloseLocalCallback.onLocalClose（AbstractWebSocketConnection.java:164）     at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection $ OnCloseLocalCallback.writeSuccess（AbstractWebSocketConnection.java:154）     在org.eclipse.jetty.websocket.common.io.FrameFlusher.notifyCallbackSuccess（FrameFlusher.java:406）     在org.eclipse.jetty.websocket.common.io.FrameFlusher $ Flusher.succeedEntries（FrameFlusher.java:241）     在org.eclipse.jetty.websocket.common.io.FrameFlusher $ Flusher.succeeded（FrameFlusher.java:231）     在org.eclipse.jetty.io.WriteFlusher.write（WriteFlusher.java:332）     在org.eclipse.jetty.io.AbstractEndPoint.write（AbstractEndPoint.java:141）     在org.eclipse.jetty.websocket.common.io.FrameFlusher $ Flusher.flush（FrameFlusher.java:152）     在org.eclipse.jetty.websocket.common.io.FrameFlusher $ Flusher.process（FrameFlusher.java:216）     在org.eclipse.jetty.util.IteratingCallback.processing（IteratingCallback.java:241）     在org.eclipse.jetty.util.IteratingCallback.iterate（IteratingCallback.java:224）     在org.eclipse.jetty.websocket.common.io.FrameFlusher.enqueue（FrameFlusher.java:381）     at org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.outgoingFrame（AbstractWebSocketConnection.java:581）     at org.eclipse.jetty.websocket.client.io.WebSocketClientConnection.outgoingFrame（WebSocketClientConnection.java:97）     在org.eclipse.jetty.websocket.common.io.AbstractWebSocketConnection.close（AbstractWebSocketConnection.java:271）     at org.eclipse.jetty.websocket.client.io.ConnectionManager.shutdownAllConnections（ConnectionManager.java:161）     在org.eclipse.jetty.websocket.client.io.ConnectionManager.doStop（ConnectionManager.java:192）     在org.eclipse.jetty.util.component.AbstractLifeCycle.stop（AbstractLifeCycle.java:89）     在org.eclipse.jetty.util.component.ContainerLifeCycle.stop（ContainerLifeCycle.java:143）     at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop（ContainerLifeCycle.java:161）     在org.eclipse.jetty.websocket.client.WebSocketClient.doStop（WebSocketClient.java:300）     在org.eclipse.jetty.util.component.AbstractLifeCycle.stop（AbstractLifeCycle.java:89）     在org.eclipse.jetty.util.component.ContainerLifeCycle.stop（ContainerLifeCycle.java:143）     at org.eclipse.jetty.util.component.ContainerLifeCycle.doStop（ContainerLifeCycle.java:161）     在org.eclipse.jetty.websocket.jsr356.ClientContainer.doStop（ClientContainer.java:213） org.springframework.messaging.simp.stomp.ConnectionLostException：连接已关闭     在org.eclipse.jetty.util.component.AbstractLifeCycle.stop（AbstractLifeCycle.java:89）     在org.eclipse.jetty.util.thread.ShutdownThread.run（ShutdownThread.java:138）