java网络传输问题

错误在 SocketTCP02Client()是Socket is closed，为什么不能写 socket.shutdownOutput();啊

public class SocketTCP02Server {
    public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(8888);
        System.out.println("服务端8888端口等待连接");
        Socket socket = serverSocket.accept();
        BufferedInputStream bis = new BufferedInputStream(
                socket.getInputStream());
        BufferedOutputStream bos = new BufferedOutputStream(
                new FileOutputStream("src\\tupian.jpg"));
        int readNum;
        byte[] bytes = new byte[10240];
        while ((readNum = bis.read(bytes)) != -1){
            bos.write(bytes, 0, readNum);
        }
        bos.close();
        bis.close();
        socket.close();
        serverSocket.close();
    }
}

public class SocketTCP02Client {
    public static void main(String[] args) throws IOException {
        Socket socket = new Socket(InetAddress.getLocalHost(), 8888);
        String FilePath = "e:\\tupian.jpg";
        BufferedInputStream bis = new BufferedInputStream(
                new FileInputStream(FilePath));
        int readNum;
        byte[] bytes = new byte[10240];
        BufferedOutputStream bos = new BufferedOutputStream(
                socket.getOutputStream());
        while ((readNum = bis.read(bytes)) != -1) {
            bos.write(bytes, 0, readNum);
        }
        bos.close();
        bis.close();
        socket.shutdownOutput();
        socket.close();
    }
}

https://blog.csdn.net/dabing69221/article/details/17351881
参考这篇文章