spring webSocket The HTTP response from the server [200] did not permit the HTTP upgrade to WebSocket

在springboot 1.5.9版本

WebSocketConfig配置
registry.addEndpoint("/webSocket").withSockJS();
在加了.withSockJS()之后导致错误:The HTTP response from the server [200] did not permit the HTTP upgrade to WebSocket
去掉之后就好了
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原文地址：https://www.cnblogs.com/cenglinjinran/p/8458390.html