通过套接字发送对象的ArrayList

Question

我正在尝试创建一个客户端服务器应用程序，服务器在其中检索电子邮件列表（标识为.txt文件），并通过电子邮件的ArrayList（这是一个对象）发送其所有内容。现在，我在客户端上出现错误，更具体地说是在读取对象的那一行上。这是我的服务器：

            File dir = new File(nomeAccount);
            String[] tmp = new String[5];
            ArrayList<Email> arr = new ArrayList<Email>();
            DateFormat df = new SimpleDateFormat("MM/dd/yyyy");
            int i = 0;
            for (File file : dir.listFiles()) {
                if (file.isFile()) {
                    Scanner input = new Scanner(System.in);
                    input = new Scanner(file);
                    while (input.hasNextLine()) {
                        tmp[i++] = input.nextLine();
                    }
                    input.close();
                }
                Date data = df.parse(tmp[4]);
                arr.add(new Email((Integer.parseInt(tmp[0])), tmp[1], nomeAccount, tmp[2], tmp[3], data));
                i = 0;
            }

            //PHASE 3: The server sends the ArrayList to the client
            try {
                ObjectOutputStream objectOutput = new ObjectOutputStream(incoming.getOutputStream());
                objectOutput.writeObject(arr);
            } catch (IOException e) {
                e.printStackTrace();
            }

这是客户：

//PHASE 2: The client receives the ArrayList with the emails
        ObjectInputStream inStream = new ObjectInputStream(s.getInputStream());
        email = (ArrayList<Email>) inStream.readObject();
        inStream.close();

我在这里得到错误： ObjectInputStream inStream = new ObjectInputStream（s.getInputStream（））;
这是错误：

    Caused by: java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.net.SocketException: Socket is closed
    at java.net.Socket.getInputStream(Socket.java:903)
    at mailbox.DataModel.loadData(DataModel.java:73)
    at mailbox.ListController.initModel(ListController.java:28)
    at mailbox.MailBox.start(MailBox.java:37)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
Exception running application mailbox.MailBox