How to ignore SSL certificate in springframe.sock - spring

Question

In my server-demo of springweb,I need a websocket client to connect my server by sockJs.
But it's err now:
SEVERE: TransportRequest[url=wss://localhost:8443/websocket/sj/endpoint-websocket/547/fbc08eaee4fd44dd9aadeb3fa5398e03/websocket] failed. Falling back on next transport.
javax.websocket.DeploymentException: The HTTP request to initiate the WebSocket connection failed
at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:372)
at org.springframework.web.socket.client.standard.StandardWebSocketClient$1.call(StandardWebSocketClient.java:152)
at org.springframework.web.socket.client.standard.StandardWebSocketClient$1.call(StandardWebSocketClient.java:149)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.util.concurrent.ExecutionException: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
at org.apache.tomcat.websocket.AsyncChannelWrapperSecure$WrapperFuture.get(AsyncChannelWrapperSecure.java:511)
at org.apache.tomcat.websocket.WsWebSocketContainer.connectToServer(WsWebSocketContainer.java:309)
... 5 more
and:
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:385)
at sun.security.validator.PKIXValidator.engineValidate(PKIXValidator.java:292)
at sun.security.validator.Validator.validate(Validator.java:260)
at sun.security.ssl.X509TrustManagerImpl.validate(X509TrustManagerImpl.java:326)
at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:283)
at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:138)
at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1325)
... 7 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(SunCertPathBuilder.java:196)
at java.security.cert.CertPathBuilder.build(CertPathBuilder.java:268)
at sun.security.validator.PKIXValidator.doBuild(PKIXValidator.java:380)
... 13 more
I had study java just one year, and I don't know how to do.
And this is my code :
connect(String url){
// Init
List<Transport> transports = new ArrayList<>(2);
transports.add(new WebSocketTransport(new StandardWebSocketClient()));
transports.add(new RestTemplateXhrTransport());
SockJsClient sockJsClient = new SockJsClient(transports);
WebSocketStompClient stompClient = new WebSocketStompClient(sockJsClient);
stompClient.setMessageConverter(new MappingJackson2MessageConverter());
StompSessionHandler sessionHandler = new StompSessionHandlerImpl();
// Connect
StompSession stompSession = stompClient.connect(url, sessionHandler).get();
}
I want to know:can I use sockJs and ignore certificate in springframe?And how?Thanks.
my springmvc version:4.3.2