今日天气:大雨落幽燕,白浪滔天(好水啊)

字节流复制文件

import java.io.*;
public class copyMP4{
	public static void main(String[] args) throws IOException {
		long start=System.currentTimeMillis();
		
//		BufferedInputStream bis=new BufferedInputStream(new FileInputStream("F:\\videos\\1.mp4"));
//		BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream("F:\\videos\\1cp.mp4"));//59毫秒

		FileInputStream fis=new FileInputStream("F:\\videos\\1.mp4");
		FileOutputStream fos=new FileOutputStream("F:\\videos\\1cpcp.mp4");//349
		
		byte[] bytes=new byte[1024];
		int len;
		while((len=fis.read(bytes))!=-1) fos.write(bytes,0,len);
		
		fis.close();
		fos.close();
		
		long end=System.currentTimeMillis();
		System.out.println(end-start);
	}
}