@frsh1987 我能正常使用了，但不知道是什么原因，有可能是缓存的问题？这个bug还挺多的

importPackage(Packages["okhttp3"]); //导入包
var client = new OkHttpClient.Builder().retryOnConnectionFailure(true).build();
var request = new Request.Builder().url("ws://192.168.1.104:9317").build(); //vscode  插件的ip地址，
client.dispatcher().cancelAll();//清理一次
myListener = {
    onOpen: function (webSocket, response) {
        print("onOpen");
        //打开链接后，想服务器端发送一条消息
        var json = {};
        json.type = "hello";
        json.data = { device_name: "模拟设备", client_version: 123, app_version: 123, app_version_code: "233" };
        var hello = JSON.stringify(json);
        webSocket.send(hello);
    },
    onMessage: function (webSocket, msg) { //msg可能是字符串，也可能是byte数组，取决于服务器送的内容
        print("msg");
        print(msg);
    },
    onClosing: function (webSocket, code, response) {
        print("正在关闭");
    },
    onClosed: function (webSocket, code, response) {
        print("已关闭");
    },
    onFailure: function (webSocket, t, response) {
        print("错误");
        print(t);
    }
}
var webSocket = client.newWebSocket(request, new WebSocketListener(myListener)); //创建链接

setInterval(() => { // 防止主线程退出

}, 1000);