package com.sxt.reader;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

/*

 * 字节缓冲流

 * BufferedInputStream

 * BufferedOutputStream

 * 实现Copy文件操作

 */

public class TestBCopy {

    public static void main(String[] args){

        BufferedInputStream bis = null;

        BufferedOutputStream bos = null;

        try {

            //输入流

            bis = new BufferedInputStream(new FileInputStream("F:\\马士兵.zip"));

            //输出流

            bos = new BufferedOutputStream(new FileOutputStream("G:\\CopyDest.zip"));

            //新建字节数组

            byte[] b = new byte[1024];

            //第一步：读取文件到程序

            int len = 0;

            while((len = bis.read(b)) != -1){//读取文件到数组 同时返回数据长度

                System.out.println(len);

                bos.write(b, 0, len);//第二步：再从程序读到文件   System.arraycopy

            }

            System.out.println("Copy操作完成！");

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        } catch (IOException e) {

            e.printStackTrace();

        }finally{

            if(bis != null){//确定流打开再关闭

                try {

                    bis.close();//关闭流

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

            if(bos != null){

                try {

                    bos.close();

                } catch (IOException e) {

                    e.printStackTrace();

                }

            }

        }

    }

}