javaee websocket 服务器连接不上

package com.ucg.base.system.message.config.controller;
 
import java.io.IOException;
 
import javax.websocket.OnClose;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.server.ServerEndpoint;
 
@ServerEndpoint(value="/websocket")
public class WebSocketTest{
 
    @OnMessage
    public void onMessage(String message, Session session) 
        throws IOException, InterruptedException {
         
        // Print the client message for testing purposes
        System.out.println("Received: " + message);
         
        // Send the first message to the client
        session.getBasicRemote().sendText("This is the first server message");
         
        // Send 3 messages to the client every 5 seconds
        int sentMessages = 0;
        while(sentMessages < 3){
            Thread.sleep(5000);
            session.getBasicRemote().
                sendText("This is an intermediate server message. Count: "
                    + sentMessages);
            sentMessages++;
        }
         
        // Send a final message to the client
        session.getBasicRemote().sendText("This is the last server message");
    }
     
    @OnOpen
    public void onOpen () {
        System.out.println("Client connected");
    }
 
    @OnClose
    public void onClose () {
        System.out.println("Connection closed");
    }
}