本次作业实现实现了大文件快速拷贝

package copy;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

public class CopyFile {

/**

* @param args

*/

public static void main(String[] args) {

long startTime = System.currentTimeMillis();

try {

FileInputStream fis = new FileInputStream ("a.mp3");

FileOutputStream fos = new FileOutputStream ("temp.mp3");

int read = fis.read();

byte[] b = new byte[1024*1000];

int len = 0 ;

while((len=fis.read(b)) != -1){

fos.write(b,0,len);

}

fis.close();

fos.close();

} catch (IOException e) {

e.printStackTrace();

}

long endTime = System.currentTimeMillis();System.out.println("复制时间："+(endTime-startTime)+"ms");

}

}