package com.imooc.io;

import java.io.BufferedOutputStream;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

public class FileOutStreamDemo {

public static void main(String[] args) {

File f1 = new File("one.txt");

File f2 = new File("two.txt");

FileOutputStream fos, fos1;

BufferedOutputStream bos;

long time1, time2, endTime1, endTime2, startTime1, startTime2;

try {

// 不用缓冲流写文件

fos = new FileOutputStream(f1, true);

startTime1 = System.currentTimeMillis();

// byte[] arr=new byte[10000];

for (int i = 0; i <= 100000; i++) {

fos.write('Z');

}

endTime1 = System.currentTimeMillis();

time1 = endTime1 - startTime1;

System.out.println(f1.getName() + "不使用缓冲流来写用时为：" + time1);

// 用缓冲流写文件

fos1 = new FileOutputStream(f2, true);

bos = new BufferedOutputStream(fos1);

startTime2 = System.currentTimeMillis();

for (int i = 0; i <= 100000; i++) {

bos.write('B');

}

endTime2 = System.currentTimeMillis();

time2 = endTime2 - startTime2;

System.out.println(f2.getName() + "使用缓冲流来写用时：" + time2);

System.out.println("节省时间:" + (time1 - time2));

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}