Java NIO之用Channel和MappedByteBuffer高效快速复制大文件

NIO的应用，复制大文件，超爽，简单高效

import java.io.RandomAccessFile; import java.nio.MappedByteBuffer; import java.nio.channels.FileChannel; import java.nio.channels.FileChannel.MapMode; public class Demo05 { public static void main(String[] args) throws Exception { FileChannel inChannel=new RandomAccessFile("f:\\01.wmv", "r").getChannel(); FileChannel outChannel=new RandomAccessFile("f:\\02.wmv", "rw").getChannel(); MappedByteBuffer map=inChannel.map(MapMode.READ_ONLY, 0, inChannel.size()); outChannel.write(map); outChannel.close(); inChannel.close(); System.out.println("复制完毕"); } }