java.lang.NoSuchMethodError: javax.servlet.ServletContext.getVirtualServerName()Ljava/lang/String; at org.apache.tomcat.websocket.server.WsSci.init(WsSci.java:131)
到'ws://127.0.0.1:8081/getUsersList/‘的WebSocket连接失败: WebSocket握手期间出错:意外响应代码: 200
alert("WebSocket is supported by your Browser!")alert("WebSocket NOT supported by y