Java Server，html客户端，无法向服务器发送消息

Question

我的项目有点问题。我有一个用Java编写的服务器和一些用html / js编写的客户端。连接以某种方式工作，但是一旦我想从客户端向服务器发送消息，它就会返回错误：“未捕获的InvalidStateError：无法在'WebSocket'上执行'发送'：仍然处于CONNECTING状态”

希望你们中的一些人能看到我的代码并帮助我:)

服务器代码：

server.Java

public class Server {

static ArrayList<Clients> clientsArrayList = new ArrayList<>();
private static int clientCount = 1;
private static int port;
private static ServerSocket ss;
private Socket socket;
private Clients clienthandler;
static boolean isRunning = true;

public Server(int port) throws IOException {

    this.port = port;
    setSs(new ServerSocket(port));
}

public void run() throws IOException {

    while (isRunning) {

        log("Listening on " + port + "...");
        socket = getSs().accept();
        log("Receiving client... " + socket);

        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));        
        PrintWriter out = new PrintWriter(socket.getOutputStream());

        String s;
        while ((s = in.readLine()) != null) {
            log(s);
            if (s.isEmpty()) {
                break;
            }
        }

        log("Creating a new handler for this client...");

        clienthandler = new Clients(socket, "Client " + clientCount, in, out);
        Thread t = new Thread(clienthandler);

        clientsArrayList.add(clienthandler);
        log("Added to client list");
        t.start();
        clientCount++;

        GUI.texttoclientlog();
    }

}

public static ServerSocket getSs() {
    return ss;
}

public static void setSs(ServerSocket ss) {
    Server.ss = ss;
}

public void log(String logtext) {
    System.out.println(logtext);
    GUI.texttolog(logtext);

}

}

clients.Java

public class Clients implements Runnable {

private String name;
final BufferedReader in;
final PrintWriter out;
Socket socket;
boolean isloggedin;

public Clients(Socket socket, String name, BufferedReader in, PrintWriter out) {

    this.out = out;
    this.in = in;
    this.name = name;
    this.socket = socket;
    this.isloggedin = true;
}

@Override
public void run() {

    String received;
    while (true) {
        try {
            // receive the string
            received = in.readLine();

            System.out.println(received);

            GUI.messagehandler(this.getName() + ": " + received);

            if (received.equals("logout")) {
                this.isloggedin = false;
                this.socket.close();
                break;
            }

            this.in.close();
            this.out.close();
            this.out.flush();
            this.out.flush();

        } catch (IOException e) {
            e.printStackTrace();

        }

    }
}

public String getName() {
    return name;

}

}

和JS客户端代码：

    <script>
  var connection;

  connection = new WebSocket("ws://localhost:6788/");
  console.log("connection established");

  connection.onmessage = function (e) { console.log(e.data); };
  connection.onopen = () => conn.send("Connection established");
  connection.onerror = function (error) {
    console.log("WebSocket Error" + error);
  };

  function Send() {
    if (connection.readyState === 1) {
      connection.send("test");
    }
        console.log("error sending");
    }

</script>

Answer 1

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