Util

NioCopy

    public  static  void nioCopyFile(String resource,String destination)
    throws  Exception{
     FileInputStream fis = new FileInputStream(resource);
        FileOutputStream fos = new FileOutputStream(destination);

        //得到readChannel
        FileChannel readChannel = fis.getChannel();
        //得到writeChannel
        FileChannel writeChannel = fos.getChannel();
        ByteBuffer buffer = ByteBuffer.allocate(1024);
        while(true){
            buffer.clear();
            int len = readChannel.read(buffer);
            if(len==-1){
                break;
            }
            buffer.flip();//read--->write
            writeChannel.write(buffer);
        }
        readChannel.close();
        writeChannel.close();
    }