FileChannel实现简单的文件拷贝

public class NIOFileChannel {
    public static void main(String[] args) throws Exception {
        FileInputStream fileInputStream = new FileInputStream("C:\\Users\\xiatian\\Desktop\\1.txt");
        FileChannel channel = fileInputStream.getChannel();

        FileOutputStream fileOutputStream = new FileOutputStream("C:\\Users\\xiatian\\Desktop\\2.txt");
        FileChannel outChannel = fileOutputStream.getChannel();

        ByteBuffer byteBuffer = ByteBuffer.allocate(1024);
        // read从channel读到缓冲区
        while(-1 != channel.read(byteBuffer)){
            byteBuffer.flip();
            //  write从缓冲区写到channel中
            outChannel.write(byteBuffer);
            byteBuffer.clear();
        }
        fileInputStream.close();
        fileOutputStream.close();
    }
}