c#上传文件到java服务器上,将文件从Java发送到C#

我想从Java服务器向C#客户端发送二进制文件.这是我正在使用的代码：

Java服务器：

ServerSocket serverSocket = new ServerSocket(1592);

Socket socket = serverSocket.accept();

PrintWriter out = new PrintWriter(socket.getOutputStream(),true);

File file = new File("img.jpg");

//send file length

out.println(file.length());

//read file to buffer

byte[] buffer = new byte[(int)file.length()];

DataInputStream dis = new DataInputStream(new FileInputStream(file));

dis.read(buffer, 0, buffer.length);

//send file

BufferedOutputStream bos = new BufferedOutputStream(socket.getOutputStream());

bos.write(buffer);

bos.flush();

Thread.sleep(2000);

C#客户端：

//connect to server

TcpClient tcpClient = new TcpClient();

tcpClient.Connect("127.0.0.1", 1592);

NetworkStream networkStream = tcpClient.GetStream();

StreamReader sr = new StreamReader(networkStream);

//read file length

int length = int.Parse(sr.ReadLine());

Console.WriteLine("File size: {0} bytes", length);

//read bytes to buffer

byte[] buffer = new byte[length];

networkStream.Read(buffer, 0, (int)length);

//write to file

BinaryWriter bWrite = new BinaryWriter(File.Open("C:/img.jpg", FileMode.Create));

bWrite.Write(buffer);

bWrite.Flush();

bWrite.Close();

此代码似乎只写入文件的前69696个字节.从那里它只会??写0直到结束.

有小费吗？

谢谢