java - netty - 如何将 ChannelBuffer 类型保存到文件中？

Question

我试过使用这段代码:

saver=new FileOutputStream(file);
byte c;
while ( content.readable() ){ //content is a ChannelBuffer type
    c = content.readByte();
    saver.write(c); 
   }   

但是由于文件流是二进制的，写入速度好像真的很慢!有什么办法可以真正快速地将 ChannelBuffer 保存到文件中吗？

Answer 1

尝试将整个缓冲区写入文件。本示例代码来自netty文件上传app .

    FileOutputStream outputStream = new FileOutputStream(file);
    FileChannel localfileChannel = outputStream.getChannel();
    ByteBuffer byteBuffer = buffer.toByteBuffer();
    int written = 0;
    while (written < size) {
        written += localfileChannel.write(byteBuffer);
    }
    buffer.readerIndex(buffer.readerIndex() + written);
    localfileChannel.force(false);
    localfileChannel.close();