通过套接字可靠地发送文件（java）

Question

我正在开发一个客户端/服务器java应用程序。我写了两个类，一个用于发送文件，另一个用于接收文件。唯一的问题是有时只发送半个字节（不知道为什么），客户端被阻塞等待另一半到达。我在我的机器上运行客户端和服务器进行测试。如何确保所有字节都不会丢失？

文件发件人：

        OutputStream out = mSocket.getOutputStream();
        FileInputStream fileIn = new FileInputStream(mFile);

        long startTime = System.currentTimeMillis();

        /* Send bytes. */
        byte[] buffer = new byte[BUFFER_SIZE];
        int read;
        int readTotal = 0;

        while ((read = fileIn.read(buffer)) != -1) {
                out.write(buffer, 0, read);
                readTotal += read;
        }
        out.flush();

        long endTime = System.currentTimeMillis();
        System.out.println("\t" + readTotal + " bytes written in " + (endTime - startTime) + " ms.");

Filer接收器：

        InputStream in = mSocket.getInputStream();

        long startTime = System.currentTimeMillis();

        /* Read bytes. */
        byte[] buffer = new byte[BUFFER_SIZE];
        int read;
        int totalRead = 0;

        FileOutputStream fileOut = new FileOutputStream(mLocalFolder + "/" + mFileName);

        while (totalRead < mSize) {

            read = in.read(buffer);
            fileOut.write(buffer);
            totalRead += read;
            System.out.println("SO FAR " + totalRead + " OUT OF " + mSize);
        }
        fileOut.close();

        long endTime = System.currentTimeMillis();
        System.out.println("\tComplete. " + totalRead + " bytes read in " + (endTime - startTime) + "ms.");