通道连接复制文件

new io 通道连接复制文件

/**
     *new io 复制思想--通道关联，省去缓冲,达到复制的功能
     */
    public static void  newioCopy(){
        try {
            //输入输出通道
            FileChannel out = new FileOutputStream("C:\\Users\\ASUS\\Desktop\\linux\\test3.txt").
                        getChannel(),
                        in = new FileInputStream("G:\\Demo\\practice\\test2.txt").getChannel();

            //关联
            in.transferTo(0,in.size(),out);//关联到哪
            out.transferFrom(in,0,in.size());//从哪关联

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }