import java.io.*;

/*

 *  文件的复制方式

 *  1 字节流读写单个字节

 *  2 字节流读写字节数组

 *  3 字节流缓冲区 读写单个字节

 *  4 字节流缓冲区读写字节数组

 */

public class Zjsrsclx {

    public static void main(String[] args) throws Exception {

        long e = System.currentTimeMillis();

        File src = new File("D:\\ja.txt");

        File dasc = new File("C:\\ja.txt");

        long c = System.currentTimeMillis();

        System.out.println(e-c);

        lx4(src,dasc);

    }

    private static void lx4(File src, File dasc) throws Exception {

        // 4 字节流缓冲区读写字节数组

        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(src));

        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(dasc));

        byte[] b = new byte[1024*10];

        int len = 0;

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

            bos.write(b,0,len);

        }

        bis.close();

        bos.close();

    }

    private static void lx3(File src, File dasc) throws Exception {

        //3 字节流缓冲区 读写单个字节

        BufferedInputStream bis = new BufferedInputStream(new FileInputStream(src));

        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(dasc));

        int len = 0;

        while((len = bis.read())!=-1){

            bos.write(len);

        }

        bis.close();

        bos.close();

    }

    private static void lx2(File src, File dasc) throws Exception {

        //2 字节流读写字节数组

        FileInputStream fis = new FileInputStream(src);

        FileOutputStream fos = new FileOutputStream(dasc);

        int len = 0;

        byte[] b = new byte[1024*10];

        while ((len = fis.read(b))!=-1){

            fos.write(b,0,len);

        }

        fis.close();

        fos.close();

    }

    private static void lx1(File src,File dasc) throws Exception {

        //1 字节流读写单个字节

        //复制粘贴文件。

        FileInputStream fis = new FileInputStream(src);

        FileOutputStream fos = new FileOutputStream(dasc);

        int len = 0;

        while ((len = fis.read())!=-1){

           fos.write(len);

        }

        fis.close();

        fos.close();

    }

}