package com.imooc.file;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

public class MyBufferedDemo {

public static void main(String[] args) {

// 文件拷贝

try {

FileInputStream fis = new FileInputStream("happy.gif");

BufferedInputStream bis=new BufferedInputStream(fis);

FileOutputStream fos = new FileOutputStream("happycopy2.gif");

BufferedOutputStream bos=new BufferedOutputStream(fos);

long startTime=System.currentTimeMillis();

int n = 0;

byte[] b = new byte[1024];

while ((n = bis.read(b)) != -1) {

bos.write(b, 0, n);

}

//bos.flush();

long endTime=System.currentTimeMillis();

System.out.println(endTime-startTime);

fos.close();

bos.close();

fis.close();

bis.close();

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

​