Netty：如何处理从ChunkedFile接收到的块

我是netty的新手，正在尝试将chunkedfile从服务器传输到客户端。发送块很好。问题在于如何处理接收到的块并将其写入文件。我尝试的两种方法都给了我一个直接的缓冲区错误

任何帮助都将不胜感激

谢谢

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {

         System.out.println(in.toString());


         //METHOD 1: write to file
         FileOutputStream fos = new FileOutputStream("c:\\test.txt");
         fos.write(in.array());


         //METHOD 2: getting desperate   
         //InputStream inputStream = new ByteBufInputStream(in); 
         //ChunkedStream chkStream = new ChunkedStream(inputStream);             
         //outputStream.write( (chkStream.readChunk(ctx).readBytes(in, 0)).array());

         //if(chkStream.isEndOfInput()){
         //  outputStream.close();
         //  inputStream.close();
         //  chkStream.close();
         //}


         return;

     }

     out.add(in.toString(charset));

}

使用文件通道：

ByteBuf in = ...;
ByteBuffer nioBuffer = in.nioBuffer();
FileOutputStream fos = new FileOutputStream("c:\\test.txt");
FileChannel channel = fos.getChannel();
while (nioBuffer.hasRemaining()) {
    channel.write(nioBuffer);
}
channel.close();
fos.close();

---

我使用Netty4.1版本来接收块并写入文件

使用ByteBuf接收ChunkFile或FileRegion，并将其转换为ByteBuffer，即java nio。 获取RandomAccessFile的文件通道并写入ByteBuffer。 下面是我的处理程序代码：

---

谢谢你，好心的先生。我真是太傻了！

public class FileClientHandler extends ChannelInboundHandlerAdapter {

@Override
protected void channelRead(ChannelHandlerContext ctx, Object msg)
        throws Exception {

    File file = new File(dest);//remember to change dest

    if (!file.exists()) {
        file.createNewFile();
    }

    ByteBuf byteBuf = (ByteBuf) msg;
    ByteBuffer byteBuffer = byteBuf.nioBuffer();
    RandomAccessFile randomAccessFile = new RandomAccessFile(file, "rw");
    FileChannel fileChannel = randomAccessFile.getChannel();

    while (byteBuffer.hasRemaining()){;
        fileChannel.position(file.length());
        fileChannel.write(byteBuffer);
    }

    byteBuf.release();
    fileChannel.close();
    randomAccessFile.close();

}}