118-缓冲流效率测试-复制文件

package Demo11;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class text001 {
    public static void main(String[] args) throws IOException {
        long s = System.currentTimeMillis();
        FileInputStream fis = new FileInputStream("C:\code\新建文件夹\01_异常的产生过程解析.bmp");
        FileOutputStream fos = new FileOutputStream("D:\百度网盘下载");
        int len = 0;
        while ((len = fis.read()) != -1) {
            fos.write(len);
        }
        fos.close();
        fis.close();
        System.out.println("时间为"+(System.currentTimeMillis()-s));
    }
}

package Demo11;

import java.io.*;

public class text02 {
    public static void main(String[] args) throws IOException {
        long s = System.currentTimeMillis();
        FileInputStream fis = new FileInputStream("C:\code\新建文件夹\01_异常的产生过程解析.bmp");
        FileOutputStream fos = new FileOutputStream("D:\百度网盘下载");
        BufferedInputStream bis = new BufferedInputStream(fis);
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        int len = 0 ;
        byte[] bytes = new byte[1024];
        while((len = bis.read(bytes))!=-1){
            bos.write(bytes,0,len);//为什么这不是new String因为这是字节文件
        }
        bos.close();
        bis.close();
        System.out.println("时间为"+(System.currentTimeMillis()-s));
    }

}