我正在嘗試在框架中的 Jetty 服務器上使用 STOMP 與 SockJS 和 ActiveMQ karaf osgi。我能夠在嵌入式 Tomcat 服務器上運行 WebSocket，但在與 Jetty 服務器一起使用時出現問題。我的 karaf 在內部使用 Jetty 服務器。 transports.add(new WebSocketTransport(new StandardWebSocketClient())); // Got error for this in jetty所以StandardWebSocketClient改為JettyWebSocketClientpublic static void main( String[] args ) throws Exception { StompSession session = createStompWSConnection(WEBSOCKET_URI, new MyStompSessionHandler()); System.out.println("Session = " + session.getSessionId());} public static StompSession createStompWSConnection(String socketURL,StompSessionHandler sessionHandler) throws Exception { List<Transport> transports = new ArrayList<Transport>(); //transports.add(new WebSocketTransport(new StandardWebSocketClient())); transports.add(new WebSocketTransport(new JettyWebSocketClient())); SockJsClient sockJsClient = new SockJsClient(transports); WebSocketStompClient stompClient = new WebSocketStompClient(sockJsClient); stompClient.setMessageConverter(new MappingJackson2MessageConverter()); //stompClient.setMessageConverter(new Mapp); StompSession session = stompClient.connect(socketURL,sessionHandler).get(); //error occurs here System.out.println("Session : " + session); session.subscribe("/queue/msg", sessionHandler); return session;}我收到此錯誤：Caused by: java.lang.ClassNotFoundException: javax.websocket.ClientEndpointConfig$Configurator at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 2 more編輯 2 -添加了 Jetty Websocket 客戶端依賴項，現在我收到此錯誤 -<dependency><groupId>org.eclipse.jetty.websocket</groupId><artifactId>websocket-client</artifactId><version>9.3.2.v20150730</version></dependency>
2 回答
慕容3067478
TA貢獻1773條經驗 獲得超3個贊
異常表明問題是什么：
Caused by: java.lang.ClassNotFoundException: javax.websocket.ClientEndpointConfig$Configurator at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) ... 2 more
javax.websocket.ClientEndpointConfig$Configurator找不到該類。請確保正確的類加載器可以訪問所有必要的類來運行您的應用程序。
守著一只汪
TA貢獻1872條經驗 獲得超4個贊
問題是在連接時stompClient.connect(socketURL,sessionHandler).get();我還添加了實際發生錯誤的注釋。transports.add(new WebSocketTransport(new JettyWebSocketClient()));我通過替換為解決了這個問題transports.add(new RestTemplateXhrTransport());
以下是變化：
public static StompSession createStompWSConnection(String socketURL,StompSessionHandler sessionHandler) throws Exception {
List<Transport> transports = new ArrayList<Transport>();
//transports.add(new WebSocketTransport(new StandardWebSocketClient()));
//transports.add(new WebSocketTransport(new JettyWebSocketClient()));
transports.add(new RestTemplateXhrTransport());
SockJsClient sockJsClient = new SockJsClient(transports);
WebSocketStompClient stompClient = new WebSocketStompClient(sockJsClient);
stompClient.setMessageConverter(new MappingJackson2MessageConverter());
//stompClient.setMessageConverter(new Mapp);
StompSession session = stompClient.connect(socketURL,sessionHandler).get(); //error occurs here
System.out.println("Session : " + session);
session.subscribe("/queue/msg", sessionHandler);
return session;
}
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