没有类路径扫描的 Java Servlet (Tomcat 9) 中的 WebSocket

Question

我试图在没有类路径扫描的情况下在 Java Servlet (Tomcat 9) 中设置 WebSocket，但我遇到了这个错误： javax.websocket.DeploymentException: Multiple Endpoints may not be deployed to the same path [/test/{accountId}] : existing endpoint was [class probotdev.websocket.Test] and new endpoint is [class probotdev.websocket.Test]    at org.apache.tomcat.websocket.server.WsServerContainer.addEndpoint(WsServerContainer.java:169)    at org.apache.tomcat.websocket.server.WsServerContainer.addEndpoint(WsServerContainer.java:232)这是我的web.xml：<web-app version="3.0" metadata-complete="true" ...>    <absolute-ordering/>    <listener>        <listener-class>probotdev.websocket.WebSocket</listener-class>    </listener>    ...</web-app>和WebSocket班级：class WebSocket extends ServletContextListener {    override def contextInitialized(sce: ServletContextEvent): Unit = {        val container = sce.getServletContext.getAttribute("javax.websocket.server.ServerContainer").asInstanceOf[ServerContainer]        container.addEndpoint(classOf[Test])    }}最后是Test课程：@ServerEndpoint("/test")class Test {    @OnOpen    def onOpen(session: Session): Unit = {        println("Bla!")    }    ...}

Answer 1

我web.xml的配置使 Tomcat 不扫描类路径（对于 servlet 等），但它仍在扫描 WebSocket 内容。

我的解决方案？只需删除WebSocket extends ServletContextListener该类。