从inputStream读取时，TCP客户端在读取时挂起

Question

我有代码TCP服务器发送文件，我试图保存从客户端文件这个字节，但客户端冻结读取。程序不会给出任何异常，并且很难调试。

服务器代码：

private void byteSend(Result result) {
        try {
            BufferedOutputStream outToClient = new BufferedOutputStream(clientSocket.getOutputStream());

            File file = new File(Service.getInstance().getServer().getShareDirectory() + "/" + result.getData().toString().replace("__", " "));
            byte[] byteArray = new byte[(int) file.length()];

            FileInputStream fis;

            try {
                fis = new FileInputStream(file);

                BufferedInputStream bis = new BufferedInputStream(fis);
                bis.read(byteArray, 0, byteArray.length);
                outToClient.write(byteArray, 0, byteArray.length);
            } catch (FileNotFoundException ex) {
                ex.printStackTrace();
            }

            outToClient.flush();
            outToClient.close();

            clientSocket.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

客户代码：

// create file input stream
                    InputStream is = clientSocket.getInputStream();

                    // create new data input stream
                    DataInputStream dis = new DataInputStream(is);

                    // available stream to be read
                    int length = dis.available();

                    // create buffer
                    byte[] buf = new byte[length];

                    // read the full data into the buffer
                    dis.readFully(buf);

                    // for each byte in the buffer
                    for (byte b:buf)
                    {
                        // convert byte to char
                        char c = (char)b;

                        // prints character
                        System.out.print(c);
                    }
                    break;

如何解决此问题？你能给我一些提示吗？