使用FileChannel.map（）复制文件

import java.io.IOException;/** 时 代 J a v a - N o w J a v a . c o m 提 供 **/

import java.nio.MappedByteBuffer;

import java.nio.channels.FileChannel;

import java.nio.file.Path;

import java.nio.file.Paths;

import java.nio.file.StandardOpenOption;

import java.util.EnumSet;


public class Main {

  public static void main(String[] args) {

    Path copy_from = Paths

        .get("C:/folder1/folder2/folder3/videos/test.mp4");

    Path copy_to = Paths.get("C:/test.mp4");


    System.out.println("Using FileChannel.map method ...");

    try (FileChannel fileChannel_from = (FileChannel.open(copy_from,

        EnumSet.of(StandardOpenOption.READ)));

        FileChannel fileChannel_to = (FileChannel

            .open(copy_to, EnumSet.of(StandardOpenOption.CREATE_NEW,

                StandardOpenOption.WRITE)))) {
/* 来 自 nowjava.com - 时代Java*/

      MappedByteBuffer buffer = fileChannel_f