的Java IO插槽未知运输未定义

当我尝试的node.js从Java连接socket.io客户我得到这个错误：的Java IO插槽未知运输未定义

engine intercepting request for path "/socket.io/" +0ms 
engine handling "GET" http request "/socket.io/1/" +0ms 
engine unknown transport "undefined" +0ms

与此同时，当我从一个JavaScript客户端尝试，做工精细：

engine intercepting request for path "/socket.io/" +0ms 
engine handling "GET" http request "/socket.io/?EIO=3&transport=polling&t=1494940689150-0&b64=1" +0ms 
engine handshaking client "3EFWO3PTlnvZksM8AAAA" +15ms

我的Java客户端代码：

import io.socket.IOAcknowledge; 
import io.socket.IOCallback; 
import io.socket.SocketIO; 
import io.socket.SocketIOException; 

import org.json.JSONException; 
import org.json.JSONObject; 

public class BasicExample implements IOCallback { 
    private SocketIO socket; 

    public static void main(String[] args) { 
     try { 
      new BasicExample(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 

    public BasicExample() throws Exception { 

      socket = new SocketIO(); 
      socket.connect("http://localhost:9990", this); 

      socket.send("Hello Server"); 

      // Sends a JSON object to the server. 
      socket.send(new JSONObject().put("key", "value").put("key2","another value")); 

      // Emits an event to the server. 
      socket.emit("event", "argument1", "argument2", 13.37); 
    } 

    @Override 
    public void onMessage(JSONObject json, IOAcknowledge ack) { 
     try { 
      System.out.println("Server said:" + json.toString(2)); 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 
    } 

    @Override 
    public void onMessage(String data, IOAcknowledge ack) { 
     System.out.println("Server said: " + data); 
    } 

    @Override 
    public void onError(SocketIOException socketIOException) { 
     System.out.println("an Error occured"); 
     socketIOException.printStackTrace(); 
    } 

    @Override 
    public void onDisconnect() { 
     System.out.println("Connection terminated."); 
    } 

    @Override 
    public void onConnect() { 
     System.out.println("Connection established"); 
    } 

    @Override 
    public void on(String event, IOAcknowledge ack, Object... args) { 
     System.out.println("Server triggered event '" + event + "'"); 
    } 
}

在Java中，我使用socketio.jar从这里下载http://www.java2s.com/Code/Jar/s/Downloadsocketiojar.htm，这似乎是从这里编译https://github.com/Gottox/socket.io-java-client

在node.js服务器我是用户[email protected]版本。

请问，有人可以帮助我吗？

来源

2017-05-16 user3078383