package com.crow;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.nio.ByteBuffer;

import java.nio.channels.FileChannel;

/**

* Created by CrowHawk on 17/9/4.

*/

public class CopyFile {

public static void main(String[] args) throws Exception {

if (args.length<2) {

System.err.println( "Usage: java CopyFile infile outfile" );

System.exit( 1 );

}

String infile = args[0];

String outfile = args[1];

FileInputStream fin = new FileInputStream( infile );

FileOutputStream fout = new FileOutputStream( outfile );

FileChannel fcin = fin.getChannel();

FileChannel fcout = fout.getChannel();

ByteBuffer buffer = ByteBuffer.allocate( 1024 );

while (true) {

buffer.clear();

int r = fcin.read(buffer);

if (r == -1) {

break;

}

buffer.flip();

fcout.write(buffer);

}

}

}