nio

nio패키지

nio 패키지 소개

http://www.onjava.com/pub/a/onjava/2002/10/02/javanio.html
http://www.onjava.com/pub/a/onjava/2002/09/04/nio.html

파일복사

 public static void fileCopyMapped(String from, String to) throws Exception{
  
  FileInputStream fis = null;
  FileOutputStream fos = null;
  
  FileChannel in = null;
  FileChannel out = null;
  
  try{
   fis = new FileInputStream(from);
   fos = new FileOutputStream(to);
   in = fis.getChannel();
   out = fos.getChannel();
   MappedByteBuffer m = in.map(FileChannel.MapMode.READ_ONLY,0, in.size());
   out.write(m);
   
   // 두줄을 in.transferTo(0,in.size(),out);
  } catch (Exception e){
   e.printStackTrace();
   throw e;
  } finally{
   if (out!=null) out.close();
   if(in!=null) in.close();
   if(fos!=null) fos.close();
   if(fis!=null) fis.close();
   
  }
  
 }