使用DataOutputStrea传输文件，只传输了一半的数据

Question

    String fileName = "test.zip";
    String savePath = "tedd.zip";
    try
    {
        DataInputStream dis = new DataInputStream(
                              new FileInputStream(fileName));
        DataOutputStream dos = new DataOutputStream(
                              new FileOutputStream(savePath));
        int bufferSize = 1024;  
        byte[] buf = new byte[bufferSize];
        while (true) {
            int read = 0;
            if (dis != null) {
                read = dis.read(buf, 0, bufferSize);
            }
            if (read == -1) {
                break;
            }
            dos.write(buf, 0, dis.read(buf));
            dos.flush();
        }
        dos.close();
        dis.close();
    }
    catch (IOException e)
    {
        e.printStackTrace();
    }

Answer 1

dos.write(buf, 0, dis.read(buf)); 改成dos.write(buf, 0, read);