Question

我的＆＃34; Socket to ServerSocket＆＃34; -implementation的客户端看起来像这样，但它永远不会超过ObjectInputStream - 初始化。我已经尝试注释掉该行，然后执行以下print语句。连接（至少最初）成功，ServerSocket报告连接成功。

客户端

try(
    Socket socket = new Socket("localhost", 4444);
    ObjectOutputStream out = new ObjectOutputStream(socket.getOutputStream());
    ObjectInputStream in = new ObjectInputStream(socket.getInputStream());
) { 
    System.out.println("Connection and IO established");

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

服务器

while (true) {
    Socket clientSocket = serverSocket.accept();
    System.out.println("Client has connected!");         // This always prints
    new Thread(new ServerThread(clientSocket)).start();
    System.out.println("ServerThread has started");      // This as well
}

Answer 1

ObjectInputStream阻塞等待构建对等体的ObjectOutputStream。很明显，如果你在堆栈中有一个BufferedOutputStream，那么peer不会构造一个，或者可能需要在构造之后立即刷新它。

或者可能它本身就是挂起构建ObjectInputStream因为你的客户没有构建ObjectOutputStream.解决方法是始终构造和刷新<{1}}之前的ObjectOutputStream ObjectInputStream.

ObjectInputStream挂起

1 个答案: