package lianxi;

import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException;

public class CopyFile {public static void copy(File a,File b){    try {        FileInputStream fis = new FileInputStream("a.mp3");        FileOutputStream fos = new FileOutputStream("temp.mp3");        byte[] buf = new byte[1024];        int len;        int read = fis.read();        while((len = fis.read(buf))!=-1){            fos.write(buf, 0, len);        }        fis.close();        fos.close();    } catch (IOException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }}public static void main(String[] args) {    // TODO Auto-generated method stub    File a = new File("");    File b = new File("");    long start,end;    start = System.currentTimeMillis();    copy(a,b);    end = System.currentTimeMillis();    System.out.println("复制所用时间：" + (end - start) + "ms");}}