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"); } }